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RRB JE CE (CBT II) Mock Test- 2


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150 Questions MCQ Test RRB JE Mock Test Series for Civil Engineering (CE) | RRB JE CE (CBT II) Mock Test- 2

RRB JE CE (CBT II) Mock Test- 2 for Railways 2023 is part of RRB JE Mock Test Series for Civil Engineering (CE) preparation. The RRB JE CE (CBT II) Mock Test- 2 questions and answers have been prepared according to the Railways exam syllabus.The RRB JE CE (CBT II) Mock Test- 2 MCQs are made for Railways 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for RRB JE CE (CBT II) Mock Test- 2 below.
Solutions of RRB JE CE (CBT II) Mock Test- 2 questions in English are available as part of our RRB JE Mock Test Series for Civil Engineering (CE) for Railways & RRB JE CE (CBT II) Mock Test- 2 solutions in Hindi for RRB JE Mock Test Series for Civil Engineering (CE) course. Download more important topics, notes, lectures and mock test series for Railways Exam by signing up for free. Attempt RRB JE CE (CBT II) Mock Test- 2 | 150 questions in 120 minutes | Mock test for Railways preparation | Free important questions MCQ to study RRB JE Mock Test Series for Civil Engineering (CE) for Railways Exam | Download free PDF with solutions
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RRB JE CE (CBT II) Mock Test- 2 - Question 1

Comptroller and Auditor General of India submit the audit reports to _______.

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 1 The reports of the Comptroller and Auditor-General of India relating to the accounts of the Union shall be submitted to the president, who shall cause them to be laid before each House of Parliament.
RRB JE CE (CBT II) Mock Test- 2 - Question 2

Anti-defection law was passed in which Constitutional Amendment Act?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 2 The Anti-Defection Law was passed in 1985 through the 52nd Amendment to the Constitution, which added the Tenth Schedule to the Indian Constitution.
RRB JE CE (CBT II) Mock Test- 2 - Question 3

If any Fundamental Right of a citizen is breached, then under Article 32 of the Indian Constitution he can directly go to the ______.

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 3 Article 32 provides a fundamental right to each person in India to approach the Supreme Court of India for enforcement of the fundamental rights enshrined in Part III of the Constitution. One can seek an order from Supreme Court that shall bind everyone to protect their fundamental right.
RRB JE CE (CBT II) Mock Test- 2 - Question 4

Redistribution of income in a country can be brought about through

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 4 Progressive taxation is a tax that takes a larger percentage from high-income earners than it does from low-income individuals. Progressive expenditure means large percentage of expenditure from high income earners than low income earners.
RRB JE CE (CBT II) Mock Test- 2 - Question 5

What is the position of the Earth when it is at the greatest distance from the sun?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 5 The aphelion is the point in the orbit of an object where it is farthest from the Sun.
RRB JE CE (CBT II) Mock Test- 2 - Question 6

Which of the following wind is blowing from the Mediterranean sea to the North Western parts of India?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 6 A Western Disturbance is an extratropical storm originating in the Mediterranean region that brings sudden winter rain to the northwestern parts of the Indian subcontinent.
RRB JE CE (CBT II) Mock Test- 2 - Question 7

The largest herbarium of India is located at -

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 7 The largest herbarium in India is Indian Botanical Garden, Kolkata. It consists of 1000000 number of specimens.
RRB JE CE (CBT II) Mock Test- 2 - Question 8

At Barren Island, the only active volcano in India is situated in -

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 8 At Barren Island, the only active volcano in India, is situated in the Andaman Islands. Barren Island is located in the Andaman Sea and lies about 138 km (86 mi) northeast of the territory's capital, Port Blair. It is the only active Volcano along the chain from Sumatra to Myanmar and the only active volcano in India.
RRB JE CE (CBT II) Mock Test- 2 - Question 9

Which of the following elements were not found in the form of archaeological remains from Kalibangan?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 9 Kalibangan in Rajasthan has given the evidence of the earliest (c. 2800 BC) ploughed agricultural field. At Kalibangan, fire altars have been discovered. Black Copper bangles are also found at Kalibangan. A couple of burials are absent in Kalibangan.
RRB JE CE (CBT II) Mock Test- 2 - Question 10

For the first time in Gujarat, who implemented the Jizya tax?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 10 Ahmed Shah-1 implemented Jizya tax first time in Gujarat.
RRB JE CE (CBT II) Mock Test- 2 - Question 11

In which year Swami Vivekananda established the Ramakrishna Mission at Belur?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 11 Swami Vivekananda established the Ramakrishna Mission at Belur in 1897.
RRB JE CE (CBT II) Mock Test- 2 - Question 12

Which Indian Personality was conferred with the Seoul Peace Prize in South Korea?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 12 Prime Minister Narendra Modi was conferred with the Seoul Peace Prize during his two-day visit to South Korea. The Seoul Peace Prize Cultural Foundation first announced the award in October 2018. Former Secretary-General of the United Nations Kofi Annan and German Chancellor Angela Merkel are among previous award recipients.
RRB JE CE (CBT II) Mock Test- 2 - Question 13

Which state passed the Official Language (Amendment) Bill 2019 to make Sanskrit the second official language in the state?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 13 The Himachal Pradesh Assembly passed the Official Language (Amendment) Bill 2019 to make Sanskrit the second official language in the state. The bill was introduced in the Assembly by Irrigation and Public Health Minister Mahender Singh.
RRB JE CE (CBT II) Mock Test- 2 - Question 14

Which City topped and won the Swachhata Excellence Awards 2019?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 14 Atal Mission for Rejuvenation and Urban Transformation (AMRUT) cities and municipal corporations of Raigarh (1st prize), Ambikapur (2nd prize), and Kumbakonam (3rd prize) won the top Swachhata Excellence Awards 2019.
RRB JE CE (CBT II) Mock Test- 2 - Question 15

Which Indian Player has become the first Indian to smash 100 sixes in T20 Cricket?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 15 Indian opener Rohit Sharma became the first man from his country to smash a century of sixes in T20I cricket in the second T20 between India and New Zealand held in Eden Park in New Zealand.
RRB JE CE (CBT II) Mock Test- 2 - Question 16

Which among the following multilateral convention seeks to protect human health and the environment from Persistent Organic Pollutants (POPs)?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 16 The Stockholm Convention is a global treaty to protect human health and the environment from persistent organic pollutants (POPs). POPs are chemicals that remain intact in the environment for long periods, become widely distributed geographically, accumulate in the fatty tissue of living organisms,the ,and are toxic to humans and wildlife.
RRB JE CE (CBT II) Mock Test- 2 - Question 17

The ‘Montreux Record’ is a register of:

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 17 The Montreux Record is a register of wetland sites on the List of Ramsar wetlands of international importance where changes in ecological character have occurred, are occurring, or are likely to occur as a result of technological developments, pollution or other human interference.
RRB JE CE (CBT II) Mock Test- 2 - Question 18

Which among the following chronic lung disease commonly known as ‘black lung’ disease, leads to reduced life expectancy in coal-miners?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 18 Coal workers' pneumoconiosis (CWP), also known as black lung disease or black lung, is caused by long-term exposure to coal dust. It is common in coal miners and others who work with coal. It is similar to both silicosis from inhaling silica dust and to the long-term effects of tobacco smoking.
RRB JE CE (CBT II) Mock Test- 2 - Question 19

The Hydroponics is most closely related to which among the following?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 19 Hydroponics is a subset of hydro culture, which is a method of growing plants without soil by using mineral nutrient solutions in a water solvent.
RRB JE CE (CBT II) Mock Test- 2 - Question 20

Which of the following state is home to the Jawai forests that have been given Conservation Reserve status?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 20 Rajasthan will accord the biodiversity rich Jawai Bandh forests in Pali district the status of a conservation reserve.
RRB JE CE (CBT II) Mock Test- 2 - Question 21

Which is not a part of National Action Plan on Climate Change?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 21 National Mission on Pollution Control is not a part of National Action Plan on Climate Change.
RRB JE CE (CBT II) Mock Test- 2 - Question 22

Green Economy is led by?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 22 The UNEP-led Green Economy Initiative, launched in late 2008, consists of several components whose collective overall objective is to provide the analysis and policy support for investing in green sectors and in greening environmental unfriendly sectors.
RRB JE CE (CBT II) Mock Test- 2 - Question 23

Which among the following alkane has largely replaced the ozone layer-depleting halomethanes in household refrigerators and freezers?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 23 Very pure forms of butane, especially isobutane, can be used as refrigerants and have largely replaced the ozone layer depleting halomethanes, for instance in household refrigerators and freezers.
RRB JE CE (CBT II) Mock Test- 2 - Question 24

Which among the following will emit maximum mass of carbon dioxide, when the same quantity is burnt of all of them?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 24 Kerosene will emit maximum mass of carbon dioxide, when the same quantity is burnt of all of them.
RRB JE CE (CBT II) Mock Test- 2 - Question 25

The Ozone Day is observed every year on September 16 as on this day in 1987, the ___________was signed for launching efforts to arrest the depletion of the fragile ozone layer in the stratosphere that prevents the harmful ultraviolet rays of the sun from reaching the earth.

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 25 Ozone Day is observed every year on September 16 as on this day in 1987, the Montreal protocol was signed for launching efforts to arrest the depletion of the fragile ozone layer in the stratosphere that prevents the harmful ultraviolet rays of the sun from reaching the earth.
RRB JE CE (CBT II) Mock Test- 2 - Question 26

Which of the following is not a vector quantity?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 26 Speed is the distance travelled by an object in a certain interval of time. Speed is not dependent on direction; hence it is a scalar quantity. While Displacement, Momentum, and Torque have both magnitude and direction, so they are vector quantity.
RRB JE CE (CBT II) Mock Test- 2 - Question 27

At what temperature (in Fahrenheit) pure water freezes?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 27 The temperature at which a liquid freeze is called the Freezing Point. The freezing point of water is 32°F.
RRB JE CE (CBT II) Mock Test- 2 - Question 28

Which among the following determines the pitch of a sound?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 28 While frequency measures the cycle rate of the physical waveform, the pitch is how high or low it sounds when you hear it. Pitch and Frequency are related to each other. A high pitch sound corresponds to a high frequency sound wave, and a low pitch sound corresponds to a low frequency sound wave.
RRB JE CE (CBT II) Mock Test- 2 - Question 29

Which phenomenon shows the particle nature of light?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 29 The photoelectric effect is a phenomenon in which the emission of electrons occurs when a beam of light strikes a metal or a cathode surface. For the emission of electrons, incident light is required to be greater than a minimum value called Threshold Frequency. Thus, show the particle nature of light.
RRB JE CE (CBT II) Mock Test- 2 - Question 30

Electric Motor converts _____ energy to mechanical energy.

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 30 An electric motor is an electrical machine that converts electrical energy into mechanical energy.
RRB JE CE (CBT II) Mock Test- 2 - Question 31

Optical fibre works on which of the following principle of light?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 31 Optical fibre work on the principle of Total Internal Reflection of Light. In an optical fibre, when light traveling in an optically dense medium hits a boundary at a steep angle (larger than the critical angle for the boundary), the light is completely reflected. This is called total internal reflection.
RRB JE CE (CBT II) Mock Test- 2 - Question 32

Why does water tank appear shallower when viewed from the top?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 32 Water Tank appears shallower when viewed from the top due to refraction of light. This virtual depth is known as Apparent depth.
RRB JE CE (CBT II) Mock Test- 2 - Question 33

The force of friction between two surfaces will increase if:

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 33 The force of friction between two surfaces will increase if the two surfaces are pressed harder.
RRB JE CE (CBT II) Mock Test- 2 - Question 34

The reactions in which oxidation and reduction occur simultaneously are called _______.

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 34 A redox reaction is a type of chemical reaction that involves both oxidation and reduction simultaneously.
RRB JE CE (CBT II) Mock Test- 2 - Question 35

Who discovered Nitrogen?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 35 Nitrogen is a chemical element with the symbol N and atomic number 7. It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772.
RRB JE CE (CBT II) Mock Test- 2 - Question 36

Device used for the detection and measurement of all types of radiation (alpha, beta, and gamma)-

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 36 A Geiger counter (Geiger-Muller tube) is a device used to detect and measure all types of radiation alpha, beta, and gamma radiation.
RRB JE CE (CBT II) Mock Test- 2 - Question 37

Haematite is an ore/mineral of

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 37 Haematite is an ore of Iron. Hematite is colored black to steel or silver-gray, brown to reddish-brown, or red. It is mined as the main ore of iron. Varieties include kidney ore, martite (pseudomorphs after magnetite), iron rose and specularite (specular hematite). ... Maghemite is a hematite- and magnetite-related oxide mineral.
RRB JE CE (CBT II) Mock Test- 2 - Question 38

Which among the following is false about natural rubber?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 38 Natural Rubber is not a monomer of cisisoprene.
RRB JE CE (CBT II) Mock Test- 2 - Question 39

Why does Carbon Tetrachloride have no dipole moment?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 39 Carbon tetrachloride has no net dipole moment because of. Solution : CCI4 has no net dipole moment because of its regular tetrahedral structure.
RRB JE CE (CBT II) Mock Test- 2 - Question 40

Which drug is used as an Antidepressant?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 40 Bupropion is used to treat the major depressive disorder and to help people stop smoking.
RRB JE CE (CBT II) Mock Test- 2 - Question 41

Which of the following is related to simplex communication?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 41 Television is an example of simplex communication.
RRB JE CE (CBT II) Mock Test- 2 - Question 42

A _________ is used to direct and dispatch data packets between different networks.

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 42 A router is used to route data packets between different networks. It reads the information in each packet to tell where it is going. If it is destined for an immediate network it has access to, it will strip the outer packet (IP packet for example), readdress the packet to the proper Ethernet address, and transmit it on that network.
RRB JE CE (CBT II) Mock Test- 2 - Question 43

What does GUI stand for?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 43 A Graphical User Interface (GUI) is a usual interface that allows users to interact with the computer through graphical elements such as pictures and animations.
RRB JE CE (CBT II) Mock Test- 2 - Question 44

Which of the following cable technologies convertThe atomic electrical signals into optical signals?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 44 Fiber optic cables transmit signals in the form of optical signals over a narrow glass fiber stand.
RRB JE CE (CBT II) Mock Test- 2 - Question 45

IP address 128.167.152.2 belongs to which class?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 45 The range of Class B address is 128.0.0.0 to 191.255.255.255
RRB JE CE (CBT II) Mock Test- 2 - Question 46

What is Unix?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 46 UNIX is a multi-user, multi-tasking operating system. Multiple users may have multiple tasks running simultaneously.
RRB JE CE (CBT II) Mock Test- 2 - Question 47

Which of the following is not a web browser?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 47 File Transfer Protocol (FTP) is not a web browser. It is a standard network protocol used for the transfer of computer files between a client and server on a computer network.
RRB JE CE (CBT II) Mock Test- 2 - Question 48

What is ODBC?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 48 Open Database Connectivity (ODBC) is an open standard application programming interface (API) for accessing a database.
RRB JE CE (CBT II) Mock Test- 2 - Question 49

Which key is representing relationship between tables?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 49 A foreign key is a column or group of columns in a relational database table that provides a link between data in two tables. It acts as a cross-reference between tables because it references the primary key of another table, thereby establishing a link between them.
RRB JE CE (CBT II) Mock Test- 2 - Question 50

Computers designed for specialized scientific work and specific instructions are called_________.

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 50 Super computers are designed for special purposes with specific inputs. For example, Super Computers are used for scientific, defense, or architectural purposes with specific instructions or input.
RRB JE CE (CBT II) Mock Test- 2 - Question 51

Li, Na, and K are members of Döbereiner triads if the mass of Li is 7 a.m.u and mass of K is 39 a.m.u, then what is the mass of Na?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 51 Döbereiner Concept

Döbereiner showed that when the three elements were written in the order of increasing atomic masses, the atomic mass of the middle element was roughly the average of the atomic masses of the other two elements.

Application:

Atomic mass of Na = avg. mass (Li , K)

= 7 + 39 / 2 = 23a.m.u

Other example of Döbereiner triads are:

RRB JE CE (CBT II) Mock Test- 2 - Question 52

Number of links in 20 m metric chain is __________.

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 52 Most commonly used is a 20 m chain. Tallies are provided at every 2 m of the chain for quick reading. Every link of this type of chain is 0.2 m.

Therefore, number of links = 20/0.2 = 100

RRB JE CE (CBT II) Mock Test- 2 - Question 53

When the surface of the concrete member is located in the tidal zone, this kind of environmental condition for concrete is considered to be ________

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 53 As per table 3, Clause 8.2.2.1 and 35.3.2 of IS:456-2000,

When the concrete is in contact with or buried under aggressive subsoil/groundwater, this condition is considered very severe.

RRB JE CE (CBT II) Mock Test- 2 - Question 54

The reinforced concrete beam curved in the plane is subjected to ___

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 54

∴ For a curved beam loaded with point load, at any section x-x

There will be an action of Shear Force, Bending Moment, and Torsional Moment as shown in the figure.

RRB JE CE (CBT II) Mock Test- 2 - Question 55

Open specification does not include _____

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 55 Open specifications are specifications of products and manufacturers with both physical and chemical properties and such other information of the product.

The physical properties include strength, weight, thickness or size, etc. Chemical properties specify mainly the composition of the chemical content of the product and precautionary measures required to store the products.

It does not include workmanship to be achieved during construction.

RRB JE CE (CBT II) Mock Test- 2 - Question 56

Lime saturation factor for a good cement is generally _______

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 56 Lime saturation factor is the ratio of the percentage of lime to alumina, iron oxide, and silica.

LSF = Percentage of lime/Percentage of alumina + iron oxide + silica

It generally lies between 0.66 to 1.02.

RRB JE CE (CBT II) Mock Test- 2 - Question 57

Gantry girders are designed to resist

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 57 Gantry Girders: These are laterally unsupported beams provided in industrial buildings to carry cranes.

These are supposed to carry the following loads due to moving crane:

1) vertical loads or (gravity load)

2) lateral loads (produced due to jerk experienced while loading, unloading, and movement of the cranes)

3) longitudinal loads (produced due to longitudinal movement of the crane)

∴ Gantry girders are designed to resist lateral, longitudinal, and vertical loads.

RRB JE CE (CBT II) Mock Test- 2 - Question 58

If the ruling gradient is 1:200 on a particular section of B.G and if a curve of 4° is situated on this ruling gradient, what should be the actual ruling gradient?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 58 Concept

Grade compensation on B.G. is equal to 0.04 percent per degree of curve,

Compensation allowed = 0/04 × 4 = 0.16 per cent.

Now, gradient of curve is 1:200 i.e. 0.5 per cent.

∴ Actual Gradient = 0.50 – 0.16 = 0.34 per cent or 1:294

Important Point:

Grade compensation for different tracks on curves

RRB JE CE (CBT II) Mock Test- 2 - Question 59

Which situation is not considered in the design of sight distance?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 59 Sight distance available from a point is the actual distance along the road surface, over which a driver from a specified height above the carriageway has visibility of stationary or moving objects. Three sight distance situations are considered for design:
  • Stopping sight distance (SSD) or the absolute minimum sight distance

  • Intermediate sight distance (ISD) is defined as twice SSD

  • Overtaking sight distance (OSD) for safe overtaking operation

  • Headlight sight distance is the distance visible to a driver during night driving under the illumination of headlights

  • Safe sight distance to enter into an intersection

RRB JE CE (CBT II) Mock Test- 2 - Question 60

Which of the following has the highest cycle time?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 60 Power shovel, backhoe, dragline, and clamshell all are used as excavation equipment under a different set of conditions and requirements.

The table below shows a comparison between all different types of excavating equipment.

RRB JE CE (CBT II) Mock Test- 2 - Question 61

The nominal cover for beam should not be less than ________ mm for moderate exposure condition.

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 61 As per IS 456: 2000, the nominal reinforcement under different environmental conditions is as shown in the table below

RRB JE CE (CBT II) Mock Test- 2 - Question 62

Which among the following statement is incorrect for a first-class building?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 62 Specification of the first-class building are as follows

Damp Proof Coarse:- D.P.C. shall be 2.5 cm thick cement concrete 1 : 1.5 : 3, mixed with one kg of impermo per bag of cement or other standard waterproofing materials as specified and painted with two coats of bitumen.

Roof:- Roofs shall be of R.C.C slab with an insulation layer and lime concrete terracing above, supported over R.S joists or R.C.C beams as required. The height of rooms shall not be less than 3.7 m.

Flooring:- Mosaic flooring must be provided, including staircase. Floors of bedrooms shall be colored and polished of 2.5 cm cement concrete over 7.5 cm lime concrete. Floors of others shall be of 2.5 cm cement concrete over 7.5 cm lime concrete polished.

Finishing:- Inside and outside finishing shall be of 12 mm cement lime plastered 1 : 1 : 6 Drawing, dining, and bedrooms inside shall be distempered, and others inside whitewashed 3 coats.

Important Specifications:

Foundation and Plinth:- Foundation and plinth shall be of first-class brickwork in lime mortar or 1 : 6 cement mortar over lime concrete or 1 : 4 : 8 cement concrete.

Superstructure:- Superstructure shall be of first-class with lime mortar or 1 : 6 cement mortar. lintels over doors and windows shall be of R.C.C.

RRB JE CE (CBT II) Mock Test- 2 - Question 63

A block of wood floats in water with 2/3rd of its volume submerged. Its relative density is:

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 63 According to Archimedes Principle, when a body is fully or partially immersed in a liquid, the amount of liquid displaced by the body is equal to the loss of weight of the body in the liquid.

∴ Weight of wooden block = Weight of the volume of fluid displaced

Let,

The density of wooden block = γb, the density of water = γw, and volume of block = V

Weight of wooden block = γb × V

Weight of the volume of fluid displaced = γw × 2/3 × V

∴ γb = 2/3 × γw

∴ The relative density for the wooden block is 2/3.

RRB JE CE (CBT II) Mock Test- 2 - Question 64

Which of the following is the optically readable media?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 64
  • Using an optically readable medium, data is recorded by making marks in a pattern that can be read back with the help of light.

  • CD-ROM and DVD are optically readable media

  • Floppy disk is a type of disk storage composed of a disk of thin and flexible magnetic storage medium.

  • A hard disk is an electromechanical data storage device that uses magnetic storage to store and retrieve digital information.

  • Magnetic tape is a medium for magnetic recording, made of a thin, long, narrow strip of plastic film which has a magnetic coating.

RRB JE CE (CBT II) Mock Test- 2 - Question 65

The Supply Curve shows the relation between which of the following?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 65
  • The Supply curve is a graphical representation that shows the relationship between the quantity of product that a seller is able and willing to supply and the product’s price.

  • The quantity of the product supplied is on the horizontal axis (X-Axis), and the product price is measured on the vertical axis (Y-Axis) of the graph.

  • Time is an important factor to supply since suppliers must react quickly to a change in demand or price.

RRB JE CE (CBT II) Mock Test- 2 - Question 66

The line joining the points having the same elevation above the datum surface is called ________

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 66 Contour Line: It is an imaginary line joining the points of the same elevation above the datum surface.

Contour Surface: An imaginary at which every point is located at the same elevation above the datum is known as contour surface.

Contour Interval: The difference in elevation between successive contour lines on a given map is fixed. This vertical distance between any two contour lines on a map is called the contour interval.

Contour Gradient: An imaginary line on the surface of the earth having a constant inclination with the horizontal (slope) is called contour gradient. It is expressed as the ratio of the vertical height to a specified horizontal distance.

Important Point:

Horizontal Equivalent: The horizontal distance between two points on two consecutive contour lines for a given slope is known as horizontal equivalent. depends upon the slope of the ground and required grade for construction of a road, canal and contour interval.

RRB JE CE (CBT II) Mock Test- 2 - Question 67

Maximum area of reinforcement required for a beam of effective size 250 mm × 200 mm is ________

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 67 The maximum area of steel for a beam ⇒ 4% of the cross-sectional area of the beam

∴ Maximum area of steel = 0.04 × 250 × 200 = 2000 mm2

Important Point:

The minimum area of steel required for a section is given by

RRB JE CE (CBT II) Mock Test- 2 - Question 68

exposure of a high concentration of nitrogen dioxide may cause

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 68 Effects of Nitrogen Dioxide
  • Elevated levels of nitrogen dioxide can cause damage to the human respiratory tract and increase a person's vulnerability to, and the severity of, respiratory infections and asthma.

  • Long-term exposure to high levels of nitrogen dioxide can cause chronic lung disease (acute bronchitis)

  • High levels of nitrogen dioxide are also harmful to vegetation—decreasing growth or reducing crop yields.

  • It may also affect the senses, for example, by reducing a person's ability to smell an odour.

RRB JE CE (CBT II) Mock Test- 2 - Question 69

To create a mirror image of a selected object in AUTOCAD 2017, shortcut command is _______

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 69 To create a mirror image of a selected object in AUTOCAD 2017, the shortcut command is MI + (Enter).

Tips & Tricks:

Important Point:

For more shortcuts and tricks, you can refer .

RRB JE CE (CBT II) Mock Test- 2 - Question 70

CPU stands for __________.

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 70 Central Processing Unit (CPU): It is the most important unit, where all the processing jobs take place. CPU is the control centre of the computer and hence it is said to be the brain of the computer. CPU has three main components:
  1. Arithmetic Logic Unit (ALU): It performs all the arithmetic operations like addition (+), multiplication (*), subtraction (-), division (/) on the numerical data directed by the control unit. All the logical operations, like less than (<), greater="" than="" (="">), equal to (ALU also carries out =), not equal to (≠) etc..
  2. Control Unit (CU): It controls and coordinates all the operations taking place in the system. It controls the flow of data and information from one unit to the other.
  3. Registers/Memory Unit (MU): To execute a program, data and instructions need to be stored temporarily. This storage is done in the MU. The data and instructions are retrieved from MU by Control Unit to supply ALU as required by the program.

RRB JE CE (CBT II) Mock Test- 2 - Question 71

Methane an air pollutant is produced ________.

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 71 Animals produce methane during the digestion process. Currently, around 20 percent of the world's methane emissions comes from ruminants. Studies revealed that ruminants, which include cows and sheep, release more methane into the environment than kangaroos.
RRB JE CE (CBT II) Mock Test- 2 - Question 72

A force of 20 Newton acts on a body of mass 20 kg for 5 seconds. Change in its momentum is

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 72 Change in momentum = force x time = 20 x 5 = 100 Ns
RRB JE CE (CBT II) Mock Test- 2 - Question 73

The two main gases obtained from anaerobic decomposition are-

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 73 Anaerobic decomposition is an effective method for treatment of numerous organic wastes in absence of oxygen. It has following advantages over aerobic decomposition

i) Lesser energy requirement

ii) lower nutrient requirement

iii) production of biogas which is a valuable source of energy

Anaerobic Decomposition:

Organic Impurities + Anaerobic Bacteria → CO2 + CH4 + Energy

RRB JE CE (CBT II) Mock Test- 2 - Question 74

Polyethylene is formed by ____

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 74 Three methods of polymerization are as follows

i) Addition polymerization: It is a type of reaction that involves the simple linking of the monomers without forming any by-products. E.g., PVC, polyethylene, etc.

ii) Condensation polymerization: It is a type of reaction in which the linking of monomers involves the loss of small molecules like water as by-products. E.g., polyurethane, polyacetals, etc.

iii) Co-polymerization: It is the addition polymerization of two or more different monomers. E.g., Vinyl chloroacetate, Butadiene-styrene co-polymers, etc.

RRB JE CE (CBT II) Mock Test- 2 - Question 75

Equations of viscous fluid motion are analyzed by

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 75 Euler’s equation: This equation considers only pressure force and gravity forces. Thus, it holds good only for the hydrostatic condition of the fluid.

Bernoulli’s equation: This equation related to the conservation of energy of the fluid mass and it is applicable only for ideal fluid flow.

Hagen-Poiseuille equation: This equation computes head loss due to the friction in laminar as well as turbulent flow. It cannot help analyzing the viscous fluid motion.

Navier – Stokes equation: This equation considers pressure force, gravity force and viscous force and hence it completely analyses the viscous fluid motion.

However, it does not holds good for turbulent flow. Thus, Reynold’s equation is used to analyze turbulent flow.

RRB JE CE (CBT II) Mock Test- 2 - Question 76

Pile driving hammer weighs about __________

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 76 A pile driving hammer is to furnish the energy required to drive the pile into the soil by dropping from a height. The weight of the hammer varies from 225 kg to 1350 kg and the drop height is between 1.5 m to 6.0 m.

The different type of hammers used for pile driving are:

i) Drop hammer

ii) Single actin hammer

iii) Double acting hammer

iv) Differential acting hammer

v) Hydraulic hammer

vi) Diesel hammer

vii) Vibrating hammer

viii) Sonic hammer

Important Point:

A heavy hammer with a small drop is more effective than a small hammer with a large drop.

RRB JE CE (CBT II) Mock Test- 2 - Question 77

If Ec and Es are modulus of elasticity of concrete and steel respectively, then the modular ratio (m) will be

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 77 Modular ratio is defined as ratio between Modulus of elasticity of Steel and Modulus of elasticity of Concrete.

The modular ratio m has the value of 280/3σcbc, where σcbc is the permissible compressive stress in concrete due to bending in N/mm2.

RRB JE CE (CBT II) Mock Test- 2 - Question 78

Which among the following is not a Rigid Pavement Failure?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 78 Rigid Pavement Failures: -
  1. scaling of cement concrete

  2. shrinkage crack

  3. spalling of Joints

  4. Wrapping cracks

  5. Mud Pumping

  6. Structural cracks

Flexible Pavement failures: -

  1. Alligator (map) cracking

  2. Consolidation of pavement layer

  3. Shear failure

  4. Longitudinal Cracking

  5. Frost Heaving

  6. Reflection cracking

  7. Lack of binding to the lower course

  8. Formation of waves and corruption.

You should also know this:

Frost Heaving:

Frost heaving is often misunderstood for shear or other types of failures. In shear failure, the upheaval of a portion of pavement is followed with a depression. In the case of frost heaving, there is mostly a localized heaving-up pavement portion depending upon the groundwater and climatic conditions.

Mud Pumping:

Mud pumping recognized when the soil slurry ejects out through the joints and cracks of cement concrete pavement caused during the downward movement of ​the slab under the heavy wheel loads. Pumping is noticed just after the rains in cement concrete pavements that are placed on clayey soil subgrade.

RRB JE CE (CBT II) Mock Test- 2 - Question 79

A square raft of size 4 m is founded at a depth of 3 m in a cohesive soil having c = 120 kN/m2. The net ultimate bearing capacity of the soil using Terzaghi’s theory will be nearly ___

(Take: γ = 19.5 kN/m2, Nc = 9.6, Nq = 2.7 and Nγ = 1.2)

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 79 According to Terzaghi’s, ultimate bearing capacity of clayey soil for square footing is given by,

qultimate = 1.3 c Nc + γDNq + 0.4 γBNγ

qnet=1.3cNc+γD(Nq−1)+0.4γBNγ

Nc = 9.6, Nq = 2.7 and Nγ = 1.2

qnet=1.3cNc+γD(Nq−1)+0.4γBNγqnet = 1634.49 kN/m2

∴qnet ≈ 1634.50 kN/m2

RRB JE CE (CBT II) Mock Test- 2 - Question 80

When both ends of the compression members are hinged, the effective length will be

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 80 Concept

When both ends are hinged for a given compression, effective length is equal to the actual length of the member.

Tips & Tricks:

RRB JE CE (CBT II) Mock Test- 2 - Question 81

For providing an Indian type W.C. the R.C.C slab in the toilet portion:

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 81 Sunken slabs are used in the toilets, bathrooms and washing place where we have our washing machines. The purpose of having a sunken slab is to conceal all the pipes below the floor. Since the pipes that carry water are concealed below the floor, care has to be taken to avoid leakage problems.

For providing an Indian type W.C. the R.C.C slab in the toilet portion should be sunk by 50 cm.

RRB JE CE (CBT II) Mock Test- 2 - Question 82

Organic soil formed from vegetal matter and having fibrous aggregates of macroscopic and microscopic size is ______

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 82 Marl is a stiff, marine calcareous clay of greenish color.

Loamy Soil contains almost equal proportion od sand silt and clay and is found along the beds of river. Since it is most suitable for agriculture, it is also one of the alluvial soil.

Peat is an organic soil having fibrous aggregates of macroscopic and microscopic particles. It is formed from vegetal matter under excessive moisture.

Important Points:

Caliche contains gravel, silt, and sand, and its particles are cemented by calcium carbonate.

Tuff is composed of very fine particles ejected from volcanoes during its explosion and is deposited by wind or water.

RRB JE CE (CBT II) Mock Test- 2 - Question 83

Which type of rail is used by the Indian Railway?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 83 Flat footed rail was invented by Charles Vignos in 1836, and at present, about 90% of the railway in the world is laid with this form of rails.

Advantages of a flat-footed rail are as followed:

i) No chair is required as rails are directly spiked to the sleepers.

ii) It is stiffer vertically as well as laterally.

iii) It is less liable to kinks development.

iv) It is economical than all other types of rail.

v) It distributes the load over a larger area of the sleeper.

RRB JE CE (CBT II) Mock Test- 2 - Question 84

Which of the above statement is correct?

The coefficient of permeability ‘k’ depends upon:

i) Void ratio of the soil

ii) Duration of flow

iii) Diameter of the soil grain

iv) Shape of the particle

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 84 The coefficient of permeability ‘k’ is given by

where

e = void ratio

D = effective size of soil particle

γ = weight density of fluid

μ = viscosity of fluid

c = constant (depends upon the shape of the particle)

∴ The coefficient of permeability depends upon the shape of particles, the diameter of particles, and void ratio.

RRB JE CE (CBT II) Mock Test- 2 - Question 85

When a file is deleted _________

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 85
  • When a file is deleted, the data is not initially removed from the hard disk.

  • Instead, the space on the disk that was occupied by the deleted data is "deallocated."

  • After it is deallocated, space is available for use when new data is written to the disk.

  • Until space is overwritten, it is possible to recover the deleted data by using a low-level disk editor or data-recovery software

RRB JE CE (CBT II) Mock Test- 2 - Question 86

If we arrange different gases in decreasing order of their percentage available in atmosphere. Which one of the option is correct?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 86 The atmosphere is a thin layer of gases which stays above the earth due to the force of gravitation. Its air is colourless, odourless and tasteless.

Nitrogen and oxygen are two major gases of the atmosphere. Carbon dioxide (CO2), Helium, Ozone, Argon and hydrogen are found in lesser quantities. Apart from these gases, tiny dust particles are also present in the air.

The atmospheric composition of gases are as follow

RRB JE CE (CBT II) Mock Test- 2 - Question 87

Carbon monoxide forms carboxyhemoglobin in human blood that may cause

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 87 Carbon monoxide, when mixed with blood cells in the human body, leads to the formation of Carboxyhemoglobin which is Pink in colour. It decreases the oxygen-carrying capacity.

CO + Blood → Carboxyhemoglobin

Important Point:

  • Carbon monoxide is a toxic gas, but it is difficult for people to detect

  • Carbon monoxide is a product of incomplete combustion of organic matter

  • It is often produced by motor vehicles that run on gasoline, diesel, or other carbon-based fuels

  • Exposure at 100 ppm or greater can be dangerous to the human heart.

RRB JE CE (CBT II) Mock Test- 2 - Question 88

Formation of the ozone hole is maximum over

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 88 Depletion in the ozone concentration over a restricted area as springtime decline over Antarctica is called an ozone hole. An ozone hole was discovered over Antarctica by Farman et al, 1985.

It is quite large (23 million square km in 1992 and 28.3 million square km in 2000). A small ozone hole also occurs over the North Pole, it was discovered in 1990.

RRB JE CE (CBT II) Mock Test- 2 - Question 89

Which of the following Rulers founded the Nalanda Mahavihara?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 89
  • Nalanda Mahavihara was founded in the 5th century CE by Kumargupta I of the Gupta Dynasty.

  • It was an ancient Mahavihara, a Buddhist monastery.

  • Sri Gupta founded the Gupta Empire.

  • Chandragupta, I was the first great ruler of the Gupta Empire, who assumed the title of Maharajadhiraja.

  • Samudragupta was the 2nd ruler of the Gupta Empire. He was also called Napoleon of India.

RRB JE CE (CBT II) Mock Test- 2 - Question 90

Under which of the following amendments of the Indian constitution, special status was given to Delhi?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 90
  • Under the 69th amendment of the Indian Constitution, Special status was given to Delhi as the National Capital Territory of Delhi.

  • Under the 86th amendment of the Indian Constitution, Elementary education was made a fundamental right under article 21 A.

  • Under the 44th amendment of the Indian Constitution, the Right to Property was deleted as of a fundamental right.

  • Under the 42nd amendment of the Indian Constitution, Preamble was amended for the first time.

RRB JE CE (CBT II) Mock Test- 2 - Question 91

What was the theme of World Brain Day 2019?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 91
  • World Brain Day is observed on July 22 every year.

  • The day aims at promoting the interest of neurology. Previously, World Brain Day has covered topics like dementia, epilepsy, and stroke, in cooperation with other societies.

  • World Brain Day 2019 theme is Migraine: The Painful Truth.

  • This year, the focus is on migraine, which is known to be one of the world's most common brain diseases.

RRB JE CE (CBT II) Mock Test- 2 - Question 92

When a ship floats on water

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 92 According to Archimedes principle, when a body is immersed fully or partially in a liquid, it experiences an upward force that is equal to the weight of the fluid displaced by it; therefore,,, the mass of water displaced is equal to the mass of the ship.
RRB JE CE (CBT II) Mock Test- 2 - Question 93

A concave lens has a focal length of 20 cm. At what distance the image be formed from the lens if the object is placed at a distance of 40 cm from the lens.

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 93 Using,

1/f = 1/v - 1/u

Where,

f= focal length =−20cm

v= image⁡ distance=v

u= Object distance = -40 cm

1/-20 = 1/v - (1/-40)

V = -13.33 cm

RRB JE CE (CBT II) Mock Test- 2 - Question 94

Dilute hydrochloric acid is added to granulated zinc taken in a test tube. The correct observation is:

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 94 Concept

The reaction of Zn and HCl is example of displacement reaction.

When a more reactive element displaces a less reactive element from its compound then that is known as displacement reaction. Both metals and nonmetals take part in displacement reactions

Application:

The underlying reaction between hydrochloric acid and granulated zinc is :

Zn + 2HCl → ZnCl2 + H2

From the above reaction the gas released is H2

H2 is colourless odourless gas which burns with a popping sound.

RRB JE CE (CBT II) Mock Test- 2 - Question 95

What does rapid hardening cement contain?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 95 The difference of rapid hardening cement to thatordinary Portland cement is the quantity of limestone (tri-calcium silicate) used as raw material, which gives the high early strength to the cement. Rapid hardening cement uses more tri-calcium silicate (C3S) than ordinary Portland cement.
RRB JE CE (CBT II) Mock Test- 2 - Question 96

Preventing rain water to run-off and its accumulation and deposition for re-use on site is called

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 96 Rainwater harvesting is a simple method by which rainfall is collected for future usage. The collected rainwater may be stored, utilized in different ways, or directly used for recharge purposes.

By storage of rainwater, not only availability of water in increased but fall in water level can also be prevented.

RRB JE CE (CBT II) Mock Test- 2 - Question 97

Book Value ______

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 97 Book Value: It is defined as the value of the property shown in the account book in that particular year, i.e. the original cost less the total depreciation till that year.

Thus, the book value of property gradually reduces at a constant amount year after year up to the limit of scrap value.

RRB JE CE (CBT II) Mock Test- 2 - Question 98

Which of the following is most suited for tunnel construction across the narrow valley?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 98 A tunnel is defined as an underground passage for the transport of passengers, water, sewage minerals, gas, etc.

Based on alignment, tunnels are classified as follows:

i) Off-spur tunnels: These are short length tunnels to negotiate minor local obstacles, which cannot be avoided by permitted curves.

ii) Saddle or base tunnels: These tunnels are constructed along the natural slopes till the slopes do not exceed the ruling gradient.

iii) Slope tunnels: These tunnels are constructed in steep hills for economic and safe operations of roads and railways.

iv) Spiral tunnels: These tunnels are provided in narrow valleys in the form of loops in the interior of the mountain so as to increase the length of the tunnel to avoid steep slopes.

RRB JE CE (CBT II) Mock Test- 2 - Question 99

The turbine suitable for low heads and high flow rates is:

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 99 Classification of the turbine based on the energy available at the inlet

i) Reaction Turbine: A turbine for which both pressure energy and kinetic energy is available at the inlet is a reaction turbine.

E.g. Francis Turbine, Kaplan Turbine and Propeller Turbine.

They are useful for low head and high discharge.

ii) Impulse Turbine: A turbine for which only kinetic energy is available at the inlet is an impulse turbine.

E.g., Pelton Turbine and Turgo Impulse Turbine.

They are useful for high head and low discharge.

RRB JE CE (CBT II) Mock Test- 2 - Question 100

While measuring the area of a plan using a planimeter, the following readings were taken. If the anchor point was outside the plan and the zero marks of the disc was crossed once by the index in the clockwise direction, the map area is _______.

Given:

Multiplying constant = 100 cm2

Initial reading = 1.378

Final reading = 8.378

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 100 Area of the map, A=M[ Final reading − Initial reading±10N+c]

Where M = multiplying constantly.

N = No of revolution passes the zero mark [ + ve for clockwise and –ve for anti-clockwise revolution]

C = Constant of index arm = 0; when the anchor point is outside the plan

A=100×[8.378−1.378+10×1+0]

= 1700cm2

RRB JE CE (CBT II) Mock Test- 2 - Question 101

Two steel plates, each of 12 mm thickness, are connected by a double-cover butt joint by bolts as shown in figure below. If the bolt diameter is 20 mm and steel is of grade Fe 410, which one of the following sections is the most critical section for a cover plate?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 101 Critical section for Cover Plate

The cross-sectional area of the plate through various sections.

Let the width of the plate be ‘b’, the thickness of plate ‘t’ and diameter of the hole be ‘dh’

For section 1-1: Asection 1-1 = (b – 3 dh) × t

For section 2-2: Asection 2-2 = (b – 2 dh) × t

For section 3-3: Asection 3-3 = (b – 1 dh) × t

∴ Critical section for the cover plate is section 1-1 as the cross-sectional area is least.

Critical section for Main Plate:

For main plate, although the cross-sectional area is minimum at section 1-1 maximum force is resisted at section 3-3 as force is first experienced at section 3-3 and the remaining is then transferred to section 2-2 and section 1-1 respectively.

RRB JE CE (CBT II) Mock Test- 2 - Question 102

The depth of sealant, in any case, should not be less than ____

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 102 Sealants are used to fill the expansion joints provided in masonry or concrete structure. These are produced from natural or cellular rubber, bitumen, expanded plastics, coconut pith, etc.

The dept of sealant should not be more than one half of the width of the joint and should not be less than 4 mm in any case.

RRB JE CE (CBT II) Mock Test- 2 - Question 103

Centroid of the circle lies at

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 103 Concept

Centroid: The point that may be considered as the center of a one– or two–dimensional figure i.e., the sum of the displacements of all points in the figure from such a point being zero.

For the circle, the centroid lies at the centre.

∴ The centroid of the circle lies at the centre.

RRB JE CE (CBT II) Mock Test- 2 - Question 104

Composite structure is suitable for _________

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 104 Load bearing structure: It is a system of a building comprising slabs, beams, and load-bearing walls.

E.g., Rural building, temples, low rise flats, tenements, residential bungalows, etc.

Framed structure: It comprises of slabs resting on beams that are supported by a network of columns.

E.g.,.,project’s cost andneeded Multistoried or High-rise buildings.

Composite structure: It is structured with a combination of load bearing as well as framed structure.

E.g. Warehouses, halls, large factory sheds, workshops, etc.

RRB JE CE (CBT II) Mock Test- 2 - Question 105

The structure provided to support the weight of the walls above doors and windows is __________

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 105 Lintel is provided above the opening of windows, doors, and ventilators in the wall to support the weight of the wall above the openings.

Important Points:

Sills: They are provided between the bottom of the window frame and above the top of the walls below.

Weather shed/Chajja: These are generally combined with the lintels to protect doors, windows or ventilators from sun, rain, wind, frost, etc.

RRB JE CE (CBT II) Mock Test- 2 - Question 106

Which one is a file management tool that comes with windows?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 106
  • Windows explorer has become a very powerful utility for navigation and searching directories for files of the system

  • Windows Explorer is the file management tool that comes with Windows

  • It gives the ability to rename, copy, move or delete the folders and files on the computer's drives

  • Folders and files are displayed hierarchically within Windows Explorer

  • Folders contain subfolders as well as files

  • Windows Explorer is called File Explorer in Window 10

RRB JE CE (CBT II) Mock Test- 2 - Question 107

When was the Fourth Anglo Mysore war fought?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 107
  • The Fourth Anglo Mysore war was fought between the Mysore Kingdom and The East India Company in 1799.

  • Tipu Sultan was killed in the battle.

  • The First Anglo Mysore war was fought between Hyder Ali and The East India Company in 1767.

  • The Second Anglo Mysore war was fought between Hyder Ali and The East India Company in 1782.

  • The Third Anglo Mysore war was fought between Tipu Sultan and The East India Company in 1791.

RRB JE CE (CBT II) Mock Test- 2 - Question 108

The rusting of iron is a process where the iron reacts with oxygen to form rust. Chemically the reaction may be written as:

a Fe + b O2 + → c Fe2O3.

In the balanced chemical reaction, the coefficient of Fe ‘a’ is:

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 108 Balancing Oxygen

LHS = 2

RHS = 3

LCM (2,3) = 6

Multiply Oxygen on LHS by 3 and on RHS by 2

a Fe + 3 O2 + → 2 Fe2O3

Balancing Fe:

RHS = 4

LHS = 1

Multiply Fe on LHS by 4

4 Fe + 3 O2 + → 2 Fe2O3

RRB JE CE (CBT II) Mock Test- 2 - Question 109

When a hydrocarbon is burnt it gives yellow flames with black smoke. Which of the following is true regarding hydrocarbon:

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 109 Concept

Saturated Hydrocarbon:

Compounds of carbon, which are linked by only single bonds between the carbon atoms are called saturated compounds.

Unsaturated Hydrocarbon:

Compounds of carbon having double or triple bonds between their carbon atoms are called unsaturated compounds.

Application:

Saturated hydrocarbons give a clean flame while unsaturated carbon compounds will give a yellow flame with lots of black smoke.

RRB JE CE (CBT II) Mock Test- 2 - Question 110

In RCC beams, as the percentage area of tensile steel increases

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 110 As the percentage area of steel increases, the depth of the neutral axis will increase.

In a balanced section, an increase in the area of steel will result in higher tensile stress carrying capacity.

To counteract or generate equivalent compressive stress/force, the neutral axis has to come down.

In a singly reinforced rectangular beam section,

implies that

xu∝Ast

which means as the percentage area of tensile steel increases the depth of the neutral axis increases

RRB JE CE (CBT II) Mock Test- 2 - Question 111

The working conditions in Imhoff tanks are –

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 111

Imhoff tank: It is a robust and effective settler that causes a suspended solids reduction of 50 to 70%, COD reduction of 25 to 50%, and leads to potentially good sludge stabilization.

It consists of two compartments:

Upper Compartment: This compartment has a circular or rectangular shape with V-shaped walls and a slot at the bottom, allowing solids to settle into the digestion compartment, while preventing foul gas from rising up and disturbing the settling process. It is exposed to atmosphere, and thus working condition is aerobic.

Lower Compartment: In this compartment, sludge accumulates and is compacted and partially stabilized through anaerobic digestion. Thus, working condition is anaerobic

RRB JE CE (CBT II) Mock Test- 2 - Question 112

What percentage of the total cost is added in the cost of construction for contingencies?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 112 Contingency is the amount needs to be added in the base cost estimate of the project to account uncertainty in the cost of the project and to make sure that the budget is not exceeded at a certain confidence level. These uncertainties may be due to adverse weather conditions, industrial disputes etc.

On awarding the contract, 5% of the contract value is included as ​the contingency in the cost plan.

RRB JE CE (CBT II) Mock Test- 2 - Question 113

A soil has a liquid limit of 40% and plasticity index of 20%. The plastic limit of the soil will be

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 113 Plasticity Index = Liquid Limit - Plastic limit

I­­p = w­­­­l­ - w­p

I­p = 20%

w­l = 40%

20% = 40% - w­p

wL = 20%

RRB JE CE (CBT II) Mock Test- 2 - Question 114

Which scale is used to measure three dimensions on a scale?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 114 (i) Plain scale: It is can measure two successive dimensions only. (unit,1/10 unit) e.g. (cm, mm)

(ii) Diagonal scale: It can measure three successive dimensions. (unit, 1/10unit, 1/10 unit) e.g. (m, dm, cm)

(iii) Vernier Scale: It is a device for measuring accurately the fractional part of the smallest division on a graduated scale.

(iv) Graphical Scale: It is a line drawn on the map representing the corresponding ground distance.

Hence, Diagonal scale is used to measure three dimensions on a scale.

RRB JE CE (CBT II) Mock Test- 2 - Question 115

Which bearing is most suitable for girder spans extending to 20 meters long?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 115 Bearings: These are the devices used in long-span bridges to avoid the development of high stresses in the main girders due to temperature changes or deflections.

They are classified as:

a) Shallow or fixed plate bearings – suitable for spans up to 12 m.

b) Deep cast base bearings – suitable for spans 12 m to 20 m.

c) Rocker bearings – suitable for spans more than 20 m.

d) Sliding plate bearings – suitable for girders of span 12 or 20 m.

RRB JE CE (CBT II) Mock Test- 2 - Question 116

A soil with a sensitivity of 9 will have ______ structure.

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 116 The sensitivity of the soil is given by

S=qu/qr

qu = unconfined compressive strength of soil in an undisturbed state

qr = unconfined compressive strength of soil in the remolded state

Classification of soil based on Sensitivity:

RRB JE CE (CBT II) Mock Test- 2 - Question 117

The duration of second generation computers is generally accepted

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 117

Hence option B is the right answer.

RRB JE CE (CBT II) Mock Test- 2 - Question 118

Consider the following statements:

  1. The gravitational force exerted by the sun on the moon is greater than the gravitational force exerted by the earth on the moon.

  2. A heavy body falls at a faster rate than a light body in vacuum.

Which of the following statements given above is/are correct ?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 118 The gravitational force F between two bodies is directly proportional to the product of masses of those bodies. Here, since the product m1 and m2 is greater for the sun and the moon than that of the earth and the moon (because mass of the sun is greater than that of earth), therefore F exerted by the sun on the moon is greater than the F exerted by the earth on the moon.
RRB JE CE (CBT II) Mock Test- 2 - Question 119

The function of the sluice valve provided in the pipe line is

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 119 Sluice valve: These valves are used to regulate the flow of water in the pipe system by dividing into a number of sections.

Check Valve: These valves are used to check the flow of water in reverse direction. These are generally provided on the delivery side of the pump. These valves work automatically.

Scour valve: This valve is used to drain the water out of the pipe system.

RRB JE CE (CBT II) Mock Test- 2 - Question 120

‘When a body is wholly or partially, immersed in a fluid, it experiences an up thrust equal to the weight of the fluid displace’. This is known as:

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 120 Archimedes principle states that when a body is fully or partially immersed in a liquid, the amount of liquid displaced by the body is equal to the loss of weight of the body in the liquid. It states that when a body is immersed fully or partially in a fluid, it experiences an upward force that is equal to the weight of the fluid displaced by it.
RRB JE CE (CBT II) Mock Test- 2 - Question 121

The tensile strength of the concrete is estimated by ______

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 121 Flexural strength of concrete/ Bending tensile strength of concrete/ Modulus of rupture of concrete (fcr) is given by

RRB JE CE (CBT II) Mock Test- 2 - Question 122

The ordinates of unit hydrograph can be obtained by dividing each of the ordinates of direct runoff by the

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 122 Unit Hydrograph: It is defined as the direct runoff hydrograph resulting from one-unit depth (1 cm) of excess rainfall occurring uniformly over the basin and at a uniform rate for a specified duration (D-hours).

Steps to derive UH:

a) A hydrograph plotted by rainfall excess of a given duration (D-h) is selected.

b) Base flow is separated from the selected hydrograph to derive DRH.

c) The area under the DRH is calculated, which will be equal to the runoff volume.

d) The runoff volume is then divided by the catchment area to obtain effective rainfall.

e) The ordinates of the DRH are divided by the effective rainfall (Obtained from step “d”) to get the ordinates of UH of D-hr duration.

∴ The ordinates of unit hydrograph can be obtained by dividing each of the ordinates of direct runoff by the depth of direct runoff.

RRB JE CE (CBT II) Mock Test- 2 - Question 123

A fixed stipulated sum of penalty payable by the contractor having no relationship with real damage is known as?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 123 Liquidated damages: These are damages defined in the construction contract and chargeable against funds due to the contractor for each day the contractor fails to complete the project beyond the contract completion date.
RRB JE CE (CBT II) Mock Test- 2 - Question 124

As the span of a bridge increases, how does the impact factor vary?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 124 Impact factor for RC bridges, =4.5/6+L

Where L is the length of span in meters,

hence impact factor will decrease on increase with span.

RRB JE CE (CBT II) Mock Test- 2 - Question 125

Which of the following statements are correct for Load bearing structure?

I. The carpet area of the upper floor is lesser than the lower floor

II. Thickness of the higher-level wall is lesser than the lower level

III. Load of the structure is borne by the walls only

IV. It is suitable for Highrise buildings, towers or skyscrapers

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 125 The system of a building comprising of slabs, beams, and load-bearing walls are known as a load-bearing structure.

For such structure, loads from the slab roof or trusses and floors are transmitted through walls to the firm soil below the ground. In load-bearing structures, the wall thickness of the upper floors is lesser than the lower floor. Therefore, the carpet area of higher level is more than the lower level.

Such type of structure is most suited for buildings up to three storeys and a where hard strata of soil is available. It is generally adopted for residential bungalow, tenement, temples, rural buildings, etc.

RRB JE CE (CBT II) Mock Test- 2 - Question 126

A short hollow circular steel column having wall thickness 8 mm and outer diameter being 80 mm must carry a compressive load of 100 kN. Calculate the deformation of the column if the length of the column is 2 meters. (Take E = 2.1 × 105 N/mm2)

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 126 Deformation of an axially loaded bar is given by

δl=P×L/A×E

Where

δl = deformation of a bar

L = Length of a bar

A = cross-sectional area of bar

E = Modulus of Elasticity of section

Calculation:

Given: L = 2000 mm, E = 2.1 × 105 N/mm2 and P = 105 N

RRB JE CE (CBT II) Mock Test- 2 - Question 127

Consider the following statements:

In the water-supply distribution network, the dead end system is not favored because:

a. it is cumbersome in terms of design.

b. the pressure at the dead-ends becomes undesirably low in the case of additional extensions.

c. it is difficult to maintain residual chlorine levels at the dead ends.

d. at the time of repairs, service connections beyond the point of repair are deprived of water.

Of these statements.

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 127 Dead-end System

It is also called as a tree system, it consists of one main supply line, from which originates (generally at right angles) a number of sub main pipes. Each sub main is then divided into several branch pipes, called laterals. This type of distribution system is suitable for older towns which have developed in a haphazard manner, without properly planned road e.g. old city, irregularly grown city, etc.

It is easier to construct as no designing or planning is required. The pressure at the ends becomes undesirably low and it is difficult to maintain chlorine levels at the ends.

RRB JE CE (CBT II) Mock Test- 2 - Question 128

Which of the following is the information retrieval service?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 128
  • The internet is a globally connected network system that transmits data via various types of media. Sometimes it is referred to as a ‘network of networks’

  • The World Wide Web, or simply web, is a way of accessing information over the medium of the internet

  • A web browser is a software application for accessing information on the World Wide Web

RRB JE CE (CBT II) Mock Test- 2 - Question 129

When was the Battle of Ghaghra fought?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 129
  • The Battle of Ghaghra was fought between Sultan Muhammad Lodhi (The last claimant of the Lodhi Empire) and Babur (Founder of Mughal Empire in India) in 1529.

  • Muhammad Lodhi was defeated by Babur in this battle.

  • The Battle of Ghaghra was the decisive battle for the Mughals in India as It led to the complete control of the Mughals in North India.

RRB JE CE (CBT II) Mock Test- 2 - Question 130

A ball of mass 8 kg is dropped from a height of 20 m. What is the velocity with which it strikes the ground?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 130 PE lost = KE gained

KE gained = mgh

KE gained = 8*10*20

KE gained = 1600 J

KE = (1/2)mv2

1600 = (1/2)*8*v2

Solve for v

V = Square root of 400

V = 20 m/s2

RRB JE CE (CBT II) Mock Test- 2 - Question 131

Maximum limit of chloride content of reinforced concrete (in kg/m3) is _______

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 131 As per Clause 8.2.5.2 of IS 456-2000,

Maximum limit of concrete are as follows:

RRB JE CE (CBT II) Mock Test- 2 - Question 132

“Pocket” is a part of

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 132 Diversion Head Works: These are works constructed across the river to raise the water level and to divert it into the canal and also for other purposes.

Components of Diversion head work are as follows:

1) Weir or Barrage

2) Divide wall

3) Fish ladder

4) Approach channel or pocket

5) Scouring sluices

6) Silt Excluder

7) Head regulator

8) Guide bank or marginal bund

∴ “Pocket” is a part of Diversion Head Work.

RRB JE CE (CBT II) Mock Test- 2 - Question 133

Fire-resistant mortar consists of ___

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 133 Fire-resistant Mortar: This mortar is prepared by adding aluminous cement to the finely crushed powder of firebricks. General proportion is 1/3rd of aluminous cement and 2/3rd of powder of fire bricks.

These are used for lining furnace, ovens, etc.

RRB JE CE (CBT II) Mock Test- 2 - Question 134

Match List – I (Nature of the solids) with List-II (Unit operation or process connected with its removal) and select the correct answer using the codes given below the lists:

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 134 Total dissolved solids: Reverse Osmosis removes TDS by forcing the water, under pressure, through a synthetic membrane. The membrane contains microscopic pores which will allow only molecules smaller than 0.0001 microns to pass through.

As the molecules of dissolved metals and salts are large compared to the water molecules, water squeezes through the membrane leaving the metals and salts behind.

Colloidal Solids: These are extremely small size (1-200 mill microns) particles. These do not settle out on standing and cannot be removed by conventional physical treatment processes.

Colloids exhibit Brownian movement and are generally electrically charged with respect to their surroundings and hence Coagulation is the best treatment to be provided.

Volatile Solids: These are removed by sludge digestion technique as they are very fine particles. They undergo aerobic/anaerobic reactions for decomposition and forms sludge at the bottom of the tank.

Settleable Solids: They are removed by sedimentation.

RRB JE CE (CBT II) Mock Test- 2 - Question 135

Which of the following is not used in measuring perpendicular offsets?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 135 Perpendicular offsets may be set by

A. Using cross staffs

There are three types of cross-staff

1. Open cross-staff

2. The French cross-staff and

3. The Adjustable cross-staff

B. Using optical Square

C. Using Prism square

D. Using Steel tape

Hence, line ranger is not used for measuring perpendicular offsets

RRB JE CE (CBT II) Mock Test- 2 - Question 136

As per Indian Standard 456 – 2000 specifications, High Strength concrete is designated into

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 136

RRB JE CE (CBT II) Mock Test- 2 - Question 137

From the following assumption made in the derivation of Bernoulli’s equation is incorrect.

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 137 Following assumption are made in deriving the Bernoulli’s equation

1) Flow is steady

2) Fluid is incompressible

3) Fluid is non-viscous (inviscid)

4) Equation is applicable along a streamline

5) Effect of friction is neglected

6) Only pressure and gravity forces are taken into account

7) Velocity is uniform over the cross-section

RRB JE CE (CBT II) Mock Test- 2 - Question 138

Hauling equipment are used for ________

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 138 Hauling is defined as the movement of materials from one place to another. The equipment used for transportation of materials are known as hauling equipment or simply haulers.

Hauling equipment are classified as:

i) Dump Trucks

a) Side or rear dump trucks

b) Bottom dump trucks

ii) Dumpers

RRB JE CE (CBT II) Mock Test- 2 - Question 139

All columns shall be designed for minimum eccentricity l/500 + d/30 = 20 mm.

Where, l = ________

d = ________.

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 139 Minimum eccentricity to be considered along a lateral dimension as per Clause 25.4 of IS 456:2000 is equal to the unsupported length of columns/500 plus lateral dimension/30, subject to a minimum of 20 mm.

∴ l = unsupported length of column and d = lateral dimension of the column

RRB JE CE (CBT II) Mock Test- 2 - Question 140

Which of the following gain unauthorized access to the user system and demand ransom to regain access?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 140 Ransomware is a type of malicious software that threatens to publish the victim's data or perpetually block access to it unless a ransom is paid
  • In May 2017, WannaCry ransomware targeted computers running the Microsoft Windows operating system by encrypting data and demanding ransom payments in the Bitcoin cryptocurrency

  • Around 37 incidents of ransomware attacks were reported to the Indian Computer Emergency Response Team (CERT-In), according to Minister of State for Electronics and IT

Adware is any software application in which advertising banners are displayed while a program is running

Spyware is mostly used for the purposes of tracking and storing internet user movements on the web and provides pop-up ads to the internet user

Trojan horse is a program that appears harmless but in fact malicious which misleads user of its true intent

RRB JE CE (CBT II) Mock Test- 2 - Question 141

Entrance length is defined as

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 141 Entrance length: it can be observed in the diagram below, the velocity profile approaches the parabolic profile through a distance (Le) from the entry of the pipe. This is known as entrance length and is given by

RRB JE CE (CBT II) Mock Test- 2 - Question 142

A body is projected at an angle such that its horizontal range is 3 times the maximum height. Find the angle of projection.

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 142 Maximum height reached ⇒H=2sin2⁡α/2g

Range ⇒R=u2sin⁡2α/g

Calculation:

Let u and a be velocity of projection and the angle of projection.

Then Maximum height reached ⇒H=u2sin2⁡α/2g

Range ⇒R=u2sin⁡2α/g

Given that R = 3 x H

RRB JE CE (CBT II) Mock Test- 2 - Question 143

The outer protective layer of a tree is

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 143

FIGURE FROM

1) Pitch → Inner most central portion.

2) Heart wood → The inner annual rings surrounding the pith.

3) Sap wood → The outer annual rings between Heart wood and cambium layer

4) Cambium layer → A thin layer of sap between sap wood and inner bark

5) Inner bark → It gives protection of the cambium layer.

6) Outer bark → It is the outermost part of the tree.

RRB JE CE (CBT II) Mock Test- 2 - Question 144

If a radius of curvature of a simple curve is 229.2 m, then its degree of curvature is-

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 144 Concept

For 20 m chain length,

The degree of curve (D) is given by ⇒ D=1146/R

For 30 m chain length,

Degree of curve (D) is given by ⇒ D=1729/R

Calculation:

∴ For 20 m chain length, D = 1146/229.2 = 5°

∴ For 30 m chain length, D = 1729/229.2 = 7.54°

∴ Most appropriate option is 5° and hence 20 m chain length should be considered.

RRB JE CE (CBT II) Mock Test- 2 - Question 145

Many ancient monuments have been spoilt by acid rain which is

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 145 When the quantity of acids in the raining water is more than the average, then such rain is called 'Acid rain'.

We are aware that normally rainwater has a pH of 5.6. When the pH of the rainwater drops below 5.6, it is called acid rain.

Acid rain refers to the ways in which acid from the atmosphere is deposited on the earth’s surface. Oxides of nitrogen and sulphur, which are acidic in nature, can be blown by the wind along with solid particles in the atmosphere and finally settle down either on the ground as dry deposition or in water, fog and snow as wet deposition.

Acid rain is a byproduct of a variety of human activities that emit the oxides of sulphur and nitrogen in the atmosphere. As mentioned earlier, the burning of fossil fuels (which contain sulphur and nitrogenous matter) such as coal and oil in power stations and furnaces or petrol and diesel in motor engines produce sulphur dioxide and nitrogen oxides.

SO2 and NO2 after oxidation and reaction with water are major contributors to acid rain because polluted air usually contains particulate matter that catalyzes the oxidation.

2SO2 (g) + O2 (g) + 2H2O (l) → 2H2SO4 (aq)

4NO2 (g) + O2 (g)+ 2H2O (l) → 4HNO3 (aq)

The bad effects of acid rain

  • When acid rain falls and flows as groundwater reaches rivers, lakes, etc., it affects plants and animal life in the aquatic ecosystem.

  • Acid rain is harmful to agriculture, trees, and plants as it dissolves and washes away nutrients needed for their growth.

  • It causes respiratory ailments in human beings and animal

  • It may also cause corrosion in many buildings bridges, monuments, fencing, etc

  • It irritates the eyes and skin of human beings

  • This rain reduces the lustre of the metals too

  • Acid rain damages buildings and other structures made of stone or metal

  • The Taj Mahal in India has been affected by acid rain

RRB JE CE (CBT II) Mock Test- 2 - Question 146

Which of the following rivers originates outside India?

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 146
  • River Sutlej originates outside India, at Mount Kailash, Tibet.

  • It enters India through Shipki la Pass.

  • Yamuna River originates at Yamunotri Glacier, Uttarakhand.

  • Ganga River originates at Gaumukh, Gangotri Glacier, Uttarakhand.

  • Luni is the only river that flows in Rajasthan.

RRB JE CE (CBT II) Mock Test- 2 - Question 147

Ethanoic acid reacts with absolute ethanol to give a compound X. The compound X is used in making perfumes and as a flavouring agent. The compound X is:

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 147 Concept

Esterification reaction:

Esters are formed by the reaction of an acid and an alcohol.

Ethanoic acid reacts with absolute ethanol in the presence of an acid catalyst to give an ester.

Esters are sweet-smelling substances. These are used in making perfumes and as flavouring agents

Reaction:

CH3 – COOH + CH3 CH2 COOH → CH3 – CO – O – CH2 – CH3

RRB JE CE (CBT II) Mock Test- 2 - Question 148

Volumetric strain (ev) is given by ____

Here, σx = stress in x-direction, σy = stress in y-direction, σz = stress in z-direction, μ = Poisson ratio and E = Modulus of Elasticity.

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 148 Volumetric strain (ev) = ex + ey + ez

Here ex, ey, and ez are the strain in the x, y, and z directions, respectively.

RRB JE CE (CBT II) Mock Test- 2 - Question 149

A pigment generally used to impart white colour in a paint is

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 149 The main modern white hiding pigment is Titanium dioxide. Zinc oxide is a weaker white pigment with some important usages.

Some pigments are toxic, such as those used in lead paint. Paint manufacturers replaced lead white with a less toxic substitute, which can even be used to colour food titanium white (titanium dioxide).

RRB JE CE (CBT II) Mock Test- 2 - Question 150

The drain which is provided a parallel to the roadway to intercept and divert the water from hill slopes is _______

Detailed Solution for RRB JE CE (CBT II) Mock Test- 2 - Question 150 Catch water drain: The drains provided parallel to the roadway to intercept and divert the water from hilly slopes catch water drain.

Its purpose is to gather water draining from higher sloping ground before it reaches the flat land.

Side drains: These drains are also provided parallel to the roadway for plain region.

Sloping drains: These are provided at the intersections of the roadways and also along the short paths.

Cross drains: These are provided along the cross drainage portion of the roadway.

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