CBT CE Full Test - 1

# CBT CE Full Test - 1

Test Description

## 150 Questions MCQ Test RRB JE (Railways Junior Engineer) CBT Mock Test Series | CBT CE Full Test - 1

CBT CE Full Test - 1 for Railways 2023 is part of RRB JE (Railways Junior Engineer) CBT Mock Test Series preparation. The CBT CE Full Test - 1 questions and answers have been prepared according to the Railways exam syllabus.The CBT CE Full Test - 1 MCQs are made for Railways 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for CBT CE Full Test - 1 below.
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CBT CE Full Test - 1 - Question 1

### The fineness modulus of an aggregate is roughly proportional to:

Detailed Solution for CBT CE Full Test - 1 - Question 1

Fineness modulus of an aggregate is an indicator of the mean size of particles. The coarser the particle, the higher the fineness modulus.

CBT CE Full Test - 1 - Question 2

### In which of the following during the emission of radioactive rays, no changes occur in the mass or charge?

Detailed Solution for CBT CE Full Test - 1 - Question 2
• In γ-emission rays ( Gamma rays), no changes occur in the mass/charge.
• Gamma rays are electromagnetic waves of short wavelength and high frequency.
• They are emitted by most radioactive sources along with alpha or beta particles
• Through releasing a gamma photon it reduces to a lower energy state. Hence, Gamma rays have no electrical charge connected with them.
• Alpha rays are released by high mass whereas beta has high energy electrons.
CBT CE Full Test - 1 - Question 3

### The desirable length of overtaking zone as per IRC recommendation is equal to

Detailed Solution for CBT CE Full Test - 1 - Question 3

Overtaking zones are provided when OSD cannot be provided throughout the length of the highway. These are zones dedicated for overtaking operation, marked with wide roads.

The desirable length of overtaking zones is 5 times OSD and the minimum is three times OSD.

CBT CE Full Test - 1 - Question 4

Which force is required to maintain a body in Uniform circular Motion?

Detailed Solution for CBT CE Full Test - 1 - Question 4
• The Centripetal force is required to maintain a body in Uniform Circular Motion.
• Centripetal Force acts when a body moves around the other body, the force that causes this acceleration and keeps the body moving along a circular path is acting towards the centre
CBT CE Full Test - 1 - Question 5

The maximum number of passenger cars that can pass a given point on a roadway during one hour under the most ideal roadway and traffic conditions, is called

Detailed Solution for CBT CE Full Test - 1 - Question 5

Basic capacity: The basic capacity is the maximum numbers of passenger cars that can pass a given point on a lane or a roadway during one hour under the most ideal roadway and traffic conditions that can possibly be attained.

Possible capacity: It is the maximum number of vehicles that can pass a given point on a lane or roadway during one hour under the prevailing roadway and traffic conditions.

Practical Capacity: It is the maximum number of vehicles that can pass a given point on a lane or roadway during one hour with creating unreasonable delay under the prevailing roadway and traffic conditions.

Design capacity: it is the practical capacity or a smaller value determined for use in designing the highway to accommodate the design hourly volume.

Theoretical Capacity: It is the number of vehicles passing any point in one hour per lane.

CBT CE Full Test - 1 - Question 6

Which quantum number is associated with the angular momentum of the electron?

Detailed Solution for CBT CE Full Test - 1 - Question 6
• The quantum mechanical state of an electron is identified by the following quantum numbers:
1. Denoted by n, the principal quantum number is always an integer and describes the electron's state.
2. The Orbital quantum number / azimuthal quantum number is denoted by l and is associated with the angular momentum (L) of the electron due to its orbital motion. It is given by

l = n - 1

3.  The energy of an electron in a hydrogen atom is affected by a strong magnetic field and the quantum number which describes this magnetic effect is called magnetic quantum number. It is denoted by ml.

4.   Denoted by ms, the spin quantum number is associated with the intrinsic angular momentum of the electron.

CBT CE Full Test - 1 - Question 7

The average pan coefficient of the standard USWB class A pan evaporimeter used for evaporation is

Detailed Solution for CBT CE Full Test - 1 - Question 7

In order to convert pan evaporation value into lake evaporation value a pan coefficient is used.

Lake evaporation = Pan Coefficient (Cp) × Pan Evaporation

CBT CE Full Test - 1 - Question 8

Maimxum number of vehicle can be parked with -

Detailed Solution for CBT CE Full Test - 1 - Question 8

A maximum number of vehicles can be parked at 90parking angle.

This 90o parking angle causes obstruction to the road traffic particularly if the road width is less. But, it can accommodate the maximum number of vehicles for a given kerb length.

CBT CE Full Test - 1 - Question 9

Which electronic components were used in Fifth Generation Computers?

Detailed Solution for CBT CE Full Test - 1 - Question 9

Fifth Generation (Present and Future):

• 5th generation computers use ULSI (Ultra-Large Scale Integration) chips
• Millions of transistors are placed in a single IC in ULSI chips
• 64-bit microprocessors have been developed during this period
• Memory chips and flash memory up to 1 GB, hard disks up to 600 GB & optical disks up to 50 GB have been developed
• Fifth generation computing devices, based on Artificial Intelligence, are still in development, though there are some applications, such as voice recognition, that is being used today

Notes:

CBT CE Full Test - 1 - Question 10

Which of the following is not an example of a biomass energy source?

Detailed Solution for CBT CE Full Test - 1 - Question 10

Energy resources can be classified into two categories:

1. Renewable source (Non-conventional energy)
2. Non-Renewable source (Conventional energy)

Renewable energy resources are natural resources which can be regenerated continuously and are inexhaustible. They can be used again and again in an endless manner. Examples are Wood, Solar energy, wind energy, hydropower, tidal energy, geothermal energy, Biomass Energy etc.

• Biomass Energy: Energy produced by organic matter like plants and animals are called Biomass Energy
• Examples of biomass are wood, crop residues, seeds, cattle dung, sewage, agricultural wastes etc
• Biogas and biofuel are examples of biomass energy

Non-Renewable energy resources are natural resources which cannot be regenerated once they are exhausted. They cannot be used again. Examples are Oil, Coal, petroleum, natural gas, nuclear fuels etc.

CBT CE Full Test - 1 - Question 11

Who among the following authored the book 'The Golden Threshold'?

Detailed Solution for CBT CE Full Test - 1 - Question 11
• Sarojani Naidu became the first Indian women president of the Congress at the Kanpur session in 1925.
• She was the first woman to become the governor of Uttar Pradesh.
• She began writing at the age of 13. Known as the Nightingale of India, she eulogised India in her poems published in three collections, The Golden Threshold (1905), The Bird of Time (1912) and the Broken Wing (1917).
CBT CE Full Test - 1 - Question 12

Let F1 and F2 be the force between two bodies separated by a distance d and 2d respectively. Then F2/F1 is

Detailed Solution for CBT CE Full Test - 1 - Question 12

Newton’s law of gravitation states that each body in this universe attracts every other body with a force, which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centres. The direction of the force is along the line joining the particles.

CBT CE Full Test - 1 - Question 13

The method in which disposal of refuse is carried out by burning it at high temperature in the presence of oxygen

Detailed Solution for CBT CE Full Test - 1 - Question 13

Incineration is a method in which disposal of refuse is carried out by burning it at high temperature either in presence of oxygen.

Composting is the method of disposal of refuse, in which decomposition can be carried out either in presence or absence of oxygen.

Pyrolysis is a method in which the disposal of refuse is carried out by burning it at high temperature either in absence of oxygen.

Pulverization refers to the action of crushing and grinding of heavier solids into the lighter solids.

Shredding refers to the action of cutting and tearing of heavier solids into the lighter solids.

CBT CE Full Test - 1 - Question 14

While adjusting the tilting level which one of the following is considered as the principal line?

Detailed Solution for CBT CE Full Test - 1 - Question 14

Principal line:

1. The line of sight
2. The axis of the level tube

1. The line of sight and
2. The axis of the level tube
3. The axis of collars
4. The vertical axis through the spindle of the level
CBT CE Full Test - 1 - Question 15

Excess of ________ is responsible for brick’s decay.

Detailed Solution for CBT CE Full Test - 1 - Question 15

Magnesia:

A good brick earth should contain a small quantity of magnesia (about 1%)

Magnesium in brick earth imparts yellow tint to the brick.

It is responsible for reducing shrinkage

Excess of magnesia leads to the decay of bricks.

CBT CE Full Test - 1 - Question 16

Consider the following:

1. Carbon dioxide   2. Oxides of Nitrogen  3. Oxides of Sulphur

Which of the above is/are the emission/emission from coal combustion at thermal power plants?

Detailed Solution for CBT CE Full Test - 1 - Question 16
• Carbon dioxide is the emission/emission from coal combustion at thermal power plants.
• Along with carbon dioxide, sulphur dioxide and nitrogen dioxide are also gaseous emissions which leads to global warming and acid rain.
• These emissions are formed due to the combustion process when coal is burned to produce heat.
• However, emissions depend on the quantity of coal used and the amount of sulphur present in the coal.
CBT CE Full Test - 1 - Question 17

Which one of the following is an example of a determinate structure?

Detailed Solution for CBT CE Full Test - 1 - Question 17

Beam overhanging on both side

Ds = 0

Fixed beam

Ds = 3

Continuous beam

Ds = 3

Two – hinged arch

Hence, overhanging beam would be determinate structure.

CBT CE Full Test - 1 - Question 18

Mat thickness, during asphalt pavement construction through asphalt paver, is controlled by

Detailed Solution for CBT CE Full Test - 1 - Question 18

Screed:

The "floating" screed is free to pivot about its pin connections. This pin connected tow-arm arrangement enables the screed to be self-leveling and gives it the ability to compensate for irregularities in the underlying surface.

Mat thickness, which is controlled by the screed or the screed can be tied to a specified grade using sensor tracing a straight line.

CBT CE Full Test - 1 - Question 19

If the net amount of irrigation is 8 cm and field efficiency is 75%, the gross amount of water to be applied to the field will be

Detailed Solution for CBT CE Full Test - 1 - Question 19

Gross Irrigation Requirement, GIR =

The gross amount of water to be applied to the field will be

CBT CE Full Test - 1 - Question 20

Who among the following has won Australian Open Men’s Singles 2019 title at Melbourn?

Detailed Solution for CBT CE Full Test - 1 - Question 20
• Novak Djokovic defeated Rafael Nadal to win his 7th Australian Open Men’s Singles title at Melbourn.
• The resurgent world No. 1 outplayed the second-ranked Nadal 6-3, 6-2, 6-3 in a largely one-sided match.
• In Women’s Singles, Japan’s Naomi Osaka clinched her maiden Australian Open Grand Slam Singles title in Melbourne.
CBT CE Full Test - 1 - Question 21

Which country has become the 124th member of the International Criminal Court (ICC)?

Detailed Solution for CBT CE Full Test - 1 - Question 21
• Malaysia has become the 124th member of the International Criminal Court (ICC).
• The ICC is the world's only permanent war crimes court and aims to prosecute the worst abuses when national courts are unable or unwilling.
• The headquarters of International Criminal Court is in The Hague, Netherlands.
• Malaysia's capital is Kuala Lumpur and its currency is Malaysian Ringgit.
CBT CE Full Test - 1 - Question 22

The actual velocity for mouthpiece is found to be 9 m/s and the coefficient of velocity is 0.855, then the theoretical velocity for mouthpiece will be

Detailed Solution for CBT CE Full Test - 1 - Question 22

Coefficient of velocity for mouthpiece, C
Therefore,
Theoretical velocity =
Theoretical velocity =
Theoretical velocity = 10.5 m/s

CBT CE Full Test - 1 - Question 23

The rotational effect of an applied force can be measured by ________.

Detailed Solution for CBT CE Full Test - 1 - Question 23
• Moment of Force is defined as the rotational effect of a force on a body about an axis of rotation and its unit is Newton metre.
• Centripetal Force acts towards the centre of the circular path in which a body is moving.
• Impulse is the product of force and time since it is the reaction when a large force acts on a body for a very small time.
CBT CE Full Test - 1 - Question 24

The maximum shear stress in a beam of circular cross-section with radius R is given as (F = shear force)

Detailed Solution for CBT CE Full Test - 1 - Question 24

So, shear stress distribution across a circular section is parabolic.

With the increase of y, the shear stress decreases.

At y = R, τ = 0

At y = 0, τ = τ max

So, at neutral axis, the shear stress is maximum.

CBT CE Full Test - 1 - Question 25

When the USB is connected to a system, its root hub is connected to the _________.

Detailed Solution for CBT CE Full Test - 1 - Question 25

USB root hub is the software driver that connects multiple USB peripherals to the computer. Root hub is connected to the processor through Bus.

CBT CE Full Test - 1 - Question 26

If the rate of change of radial acceleration of the transition curve is 30 cm/sec3, the radius is 200 m and the velocity is 14 m/sec. The length of the transition curve is:

Detailed Solution for CBT CE Full Test - 1 - Question 26

Length of transition curve is given by:

C = rate of change of radial acceleration = 30 m/sec3

CBT CE Full Test - 1 - Question 27

Lateral ties in RCC columns are provided to resist

Detailed Solution for CBT CE Full Test - 1 - Question 27

Function of Lateral ties-

1. to resist buckling and strengthen bond.

2. to bind longitudinal reinforcement and proper distribution of concrete.

Providing lateral ties at the proper spacing confines concrete (like gripping the concrete enclosed between the lateral ties) thereby preventing pieces of failed concrete from falling away.

The transverse reinforcing bars are provided to ensure that every longitudinal bar nearest to the compression face has effective lateral support against buckling.

CBT CE Full Test - 1 - Question 28

In an element the complimentary shear stress is always:

Detailed Solution for CBT CE Full Test - 1 - Question 28

In an element the complimentary shear stress is always equal in magnitude but opposite in sign.

Concept:

Consider a rectangular block ABCD as displayed in following figure. Now assume a set of shear stresses (τ) of opposite direction, as displayed in following figure, is applied over the opposite surfaces of rectangular block i.e. AB and CD.

If we consider the effect of this set of shear stresses (τ) of opposite direction, we can easily say that there will be zero net force acting over the rectangular block but there will be one couple acting over the rectangular block in clockwise direction.

In order to balance the rectangular block, there must be one more couple of similar intensity acting over the rectangular block in opposite direction i.e. in anti-clockwise direction. Therefore, there will be one more set of shear stresses (τ’) of same intensity acting over the rest two opposite surfaces of rectangular block and this set of shear stresses will be termed as complementary shear stress.

CBT CE Full Test - 1 - Question 29

A ribbed slab is provided for which of the following?

Detailed Solution for CBT CE Full Test - 1 - Question 29

Benefits of the ribbed slab

These slabs are more flexible, light in weight, floor depth is very thin, excellent vibration control, good thermal insulation can be achieved, durable, acoustically insulated, and fire resistance. These slabs are generally used in a plain ceiling.

Therefore, all of the given options are correct.

CBT CE Full Test - 1 - Question 30

A drainage canal discharges 0.2 m3/sec of water from 250 hectares area, the drainage coefficient of the land will be

Detailed Solution for CBT CE Full Test - 1 - Question 30

Drainage Co-efficient (D.C)

The depth of water drained off from a given area in 24 hours is called the drainage co-efficient or it can be defined as the design capacity of the drainage system and is typically expressed as a depth of water removed in 24 hours.

D.C.= 6.912 × 10−3m = 6.912mm
Therefore, the drainage coefficient of the land will be 7 mm.

CBT CE Full Test - 1 - Question 31

If fck and fy are characteristic strength of concrete and yield stress of steel respectively and Es is the modulus of elasticity of steel, the ultimate flexural strain in concrete can be taken as

Detailed Solution for CBT CE Full Test - 1 - Question 31

At certain depth, the fibers would have reached the strain of 0.002 and the stress of 0.446fck.

On further increasing the load, the strain will ultimately reach to the value of 0.0035.

Beyond this strain, the concrete is believed to fail. So, once the extreme fibers fail, the cracks will develop, which leads to the weakening of the section and leading to failure of the structure.

CBT CE Full Test - 1 - Question 32

In a Newmark’s chart for stress distribution, there are 10 concentric circle and 20 radial lines. The influence factor for the chart would be

Detailed Solution for CBT CE Full Test - 1 - Question 32

Newmark's Chart consists of a number of concentric circles and radial lines, which divides the chart into different area units, the influence of which is the same at the centre of that chart.

Since the influence of each area, the unit is the same at the centre, so the influence of each area unit will be =

where m = number of a concentric circle and n = number of radial lines.
Therefore, Influence factor =

CBT CE Full Test - 1 - Question 33

In which type of flooring the base concrete of lime or cement concrete of mix 1 : 5 : 10 is laid over well-compacted sub base?

Detailed Solution for CBT CE Full Test - 1 - Question 33

In terrazzo flooring and cement concrete flooring the base course may be

• 7.5 to 10 cm thick either in lean cement concrete (1 : 3 : 6 to 1 : 5 : 10) or
• lime concrete containing 40% mortar of 1 : 2 lime-sand and 60% coarse aggregate of 40 mm nominal size

The base course is laid over well compacted soil, compacted properly and levelled to rough surface.

CBT CE Full Test - 1 - Question 34

The soundness of cement is tested by:

Detailed Solution for CBT CE Full Test - 1 - Question 34

Table showing different tests to find different property:

CBT CE Full Test - 1 - Question 35

__________ is a combination of an electronic theodolite and an electronic distance meter.

Detailed Solution for CBT CE Full Test - 1 - Question 35

Total station is a combination of an electronic theodolite and an electronic distance meter.

The combination makes it possible to determine the coordinates of a reflector by aligning the instruments cross-hairs on the reflector.

Simultaneously it can measure vertical and horizontal angle and slope distance.

A microprocessor in the instrument take care of the recordings, readings, and other computations.

CBT CE Full Test - 1 - Question 36

If one end of a hinged column is made fixed and the other free, how much is the critical load compared to the original value?

Detailed Solution for CBT CE Full Test - 1 - Question 36

When one end of the hinged column is fixed and other free. New Le = 2L

CBT CE Full Test - 1 - Question 37

Which is the type of pan concrete mixers?

Detailed Solution for CBT CE Full Test - 1 - Question 37

Pan Type Concrete Mixers:

Pan type mixers consists a circular pan in which concrete is mixed. The mixing is done by blades which are arranged in star shape inside the pan.

There are two types of pan mixers are available.

1. The one in which, the circular pan is constant and only star blades rotate about vertical axis of pan.

2. The one in which circular pan rotates while the blades are at static position.

In both the cases, the mixing is efficient and concrete mixture is collected through central hole provided in the pan.

The rotating star blades contains special blades called scrapper blades which will make concrete not to stick to the pan.

CBT CE Full Test - 1 - Question 38

Which of the following chemical compounds is used for causing acid rain?

Detailed Solution for CBT CE Full Test - 1 - Question 38
• Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air.
• These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.
• Sulfur dioxide and nitrogen oxides dissolve very easily in water and can be carried very far by the wind.
• As a result, the two compounds can travel long distances where they become part of the rain, sleet, snow, and fog that we experience on certain days.
CBT CE Full Test - 1 - Question 39

The minimum grade of plain concrete in sea-water or exposed directly along the sea coast shall be at least:

Detailed Solution for CBT CE Full Test - 1 - Question 39

Concrete in Sea-water (as per IS 456: 2000)

Concrete in sea-water or exposed directly along the sea-coast shall be at least M 20 Grade in the case of plain concrete and M 30 in case of reinforced concrete. The use of slag or pozzolana cement is advantageous under such conditions.

CBT CE Full Test - 1 - Question 40

Which of the following folk/tribal dances is associated with Karnataka?

Detailed Solution for CBT CE Full Test - 1 - Question 40

Yakshagana is a popular folk-theatre form of Karnataka with a long history of nearly four hundred years. It is a unique harmony of musical tradition, eye-catching costumes, and authentic styles of dance, improvised gestures and acting with its extemporaneous dialogue appealing to a wide range of the community. It is a vibrant and vigorous living form of theatre art.

CBT CE Full Test - 1 - Question 41

The intensity of light is ________ due to constructive interference.

Detailed Solution for CBT CE Full Test - 1 - Question 41
• The non-uniform distribution of energy due to the superposition of light waves in a media is called the interference of light.
• Constructive interference occurs when the crest of one wave falls on the crest of other wave or the trough of one wave falls on the trough of the other wave.
• The resultant intensity due to constructive interference is, therefore, maximum.
CBT CE Full Test - 1 - Question 42

Which Pass connects the Kashmir valley with the Deosai Plains of Ladakh?

Detailed Solution for CBT CE Full Test - 1 - Question 42
• Burzail Pass connects the Kashmir valley with Deosai Plains of Ladakh.
• It remains covered in snow during the winter.
CBT CE Full Test - 1 - Question 43

Why is the Caps Lock key referred to as a toggle key?

Detailed Solution for CBT CE Full Test - 1 - Question 43

A toggle key toggles the input from other keys on the keyboard between different input modes.

• The most commonly used toggle key is the caps lock key, which alternates the letter keys between uppercase and lowercase
• Num lock is another toggle key which helps to input numerals from the numeric keyboard and is turned on by default
• Scroll lock key allows arrow keys to scroll through window's contents and allows users to scroll without depending on the scroll bar
• The insert key is another example of a toggle key, and it toggles between overtype mode and insert mode while entering text
CBT CE Full Test - 1 - Question 44

What is the tagline for ‘Pradhan Mantri Krishi Sinchayee Yojana’?

Detailed Solution for CBT CE Full Test - 1 - Question 44
• “More Crop per Drop” is the tagline for ‘Pradhan Mantri Krishi Sinchayee Yojana’.
• The policy was launched in the year 2015-2016 to promote farming and irrigation.
• The main objective of the scheme is to converge the investments in irrigation at the farm level and provide end to end solutions to the farmers.
CBT CE Full Test - 1 - Question 45

A computer virus is a

Detailed Solution for CBT CE Full Test - 1 - Question 45

A computer Virus is a malicious software that, when executed replicates itself by modifying other computer programs.

The full of VIRUS is Vital Information Recourse Under Siege, because they replicate and multiply and use up computer memory processing power with fake repetitive commands. It causes the system to become slow and keeps hanging.

CBT CE Full Test - 1 - Question 46

Out of the constituents of cement namely, tricalcium silicate (C2S), dicalcium silicate (C2S), tricalcium aluminate (C3A) and tetracalcium alumina ferrite (C4AF), which has the highest rate of hydration:

Detailed Solution for CBT CE Full Test - 1 - Question 46

The rate of hydration out of four Bogue's compounds in descending order is given below: C4AF, C3A, C3S, C2S.

Note:

This question is about the rate of hydration and not the heat of hydration.

The rate of hydration is highest for C4AF and heat of hydration is highest for C3A.

CBT CE Full Test - 1 - Question 47

The average crushing and tensile strength of hand molded bricks in kN/m2 is:

Detailed Solution for CBT CE Full Test - 1 - Question 47

The average crushing strength and tensile strength of hand molded bricks are 60,000 kN/m2 and 2000 kN/m2 respectively. The shearing strength of bricks is about one-tenth of the crushing strength

CBT CE Full Test - 1 - Question 48

A suspension bridge with a two-hinged stiffening girder is

Detailed Solution for CBT CE Full Test - 1 - Question 48

A suspension bridge with a two-hinged stiffening girder is statically indeterminate of one degree.

A suspension bridge with a three-hinge stiffening girder is statically determinate.

CBT CE Full Test - 1 - Question 49

For determining the ultimate bearing capacity of soil the recommended size of square bearing plate used in the plate load test is 30-75 cm with a minimum thickness of:

Detailed Solution for CBT CE Full Test - 1 - Question 49

Shape and size of the plate load test are given below:

• Square or circular in shape
• Thickness >= 25 mm
• Size may vary from 300 to 750 mm
• For clayey and silty soils and for loose to medium dense sandy soils with N<15, 450 mm square plate is used
• For dense sandy or gravelly soils(15< N < 30) three plates of sizes 300 mm to 750 mm is used depending  on reaction loading and maximum grain size
• Side of plate = 4× size of particles
CBT CE Full Test - 1 - Question 50

The equivalent stiffness of two springs of stiffness S1 and S2 joined in series is given by:

Detailed Solution for CBT CE Full Test - 1 - Question 50

Equivalent stiffness of spring for series combination:

Equivalent stiffness of spring for parallel combination:

Seq = S1 + S2

CBT CE Full Test - 1 - Question 51

Which of the following instruments is not connected with stream flow measurement?

Detailed Solution for CBT CE Full Test - 1 - Question 51

Generally, three methods are used for making stream flow measurements:

i) Current meter.

ii) Dilution techniques.

iii) Indirect methods.

The new modern techniques for stream flow measurement are:

i) Electromagnetic flow meter

ii) Sounding weight

iii) Echo-depth recorder

Hygrometer is an instrument used for measuring the amount of humidity and water vapour in the atmosphere, soil and in confined spaces.

CBT CE Full Test - 1 - Question 52

If the permissible compressive stress in concrete in bending for M30 grade of concrete is 10 N/mm2, then modular ratio will be

Detailed Solution for CBT CE Full Test - 1 - Question 52

As per IS : 456-2000, modular ratio is given by

For M30 concrete

σcbc = 10 N/mm2

CBT CE Full Test - 1 - Question 53

Chlorofluorocarbons which damage the ozone layer of the atmosphere are not used in which of the following?

Detailed Solution for CBT CE Full Test - 1 - Question 53
• Chlorofluorocarbons (CFC) are used in Refrigerator, Air conditioner and Aerosol spray.
• Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine.
CBT CE Full Test - 1 - Question 54

Which one is the intensity of the level of noise?

Detailed Solution for CBT CE Full Test - 1 - Question 54

Intensity of level of noise is denoted by “Decibel”

Dimensions are measured in meters, centimetres etc.

Force is measured in Newtons

Luminous intensity is measured in candela.

CBT CE Full Test - 1 - Question 55

Presence of fluoride in water greater than the permissible level of 1.5 mg/L causes

Detailed Solution for CBT CE Full Test - 1 - Question 55

Presence of fluoride in water greater than permissible limit of 1.5 mg/lit causes dental fluorosis. Only children are affected. The fluoride in water greater than 5 mg/lit causes deformation of bones.

Methemoglobinemia (Blue baby disease) is caused by excess of nitrates in water. Nitrate is not harmful as it is fully oxidized. The permissible limit of nitrate is 45 mg/lit. High quantities of copper are likely to affect human lungs and other respiratory organs.

CBT CE Full Test - 1 - Question 56

When KMnO4 is added in water for the purpose of disinfection, which color appear in the water

Detailed Solution for CBT CE Full Test - 1 - Question 56

Disinfection with KMnO4

1. When KMnO4 is added in water, pink colour appears in the water.
2. If the colour disappear indicates the presence of microorganism and organic matter in it.
3. KMnO4 is added further up to an extent pink colour remains stable in water.
4. The stand of pink colour in water indicates the removal of microorganism and organic matter from the water.
5. It is advisable not to use water for 48 hours after the treatment with KMnO4.
CBT CE Full Test - 1 - Question 57

Maximum spacing of shear reinforcement measured along the axis of the member for vertical shear shall not exceed the lesser of:

Detailed Solution for CBT CE Full Test - 1 - Question 57

According to IS 456:2000, clause 26.5.1.5,

The maximum spacing of shear reinforcement measured along the axis of the member shall not exceed 0.75 d for vertical stirrups where d is the effective depth of the section under consideration. In no case shall the spacing exceed 300 mm.

CBT CE Full Test - 1 - Question 58

The commercially successful fibres in fibre reinforced concrete are of:

Detailed Solution for CBT CE Full Test - 1 - Question 58

Conventional concrete is modified by random dispersal of particles of short discrete fibres. These fibres may be of steel, glass, carbon, asbestos etc. Such concrete is known as fibre reinforced concrete. Asbestos cement fibres so far have proved to be commercially successful.

CBT CE Full Test - 1 - Question 59

If the depth of flow in a channel is 1 m and the velocity of the flow is 2 m/sec, then the velocity at which elementary wave can travel upstream is:

Detailed Solution for CBT CE Full Test - 1 - Question 59

Velocity at which elementary wave can travel upstream (Vu/s) = C – V

Where,

C = celerity =
y = depth of flow

Vu/s = 3.132 – 2 = 1.132 m/s

CBT CE Full Test - 1 - Question 60

Which among the following is/are output devices?

I. Scanner
II. Speaker
III. Plotter

Detailed Solution for CBT CE Full Test - 1 - Question 60

An input device is any hardware device that sends data to a computer, allowing you to interact with and control it.

An output device is any hardware that sends data from a computer to another device mostly in form of audio or video.

• Scanner scans any document and sends it to computer, so it is a input device.
• Speaker gets data from computer in form of audio. So it is a output device.
• Plotter is printer that print vector image. It recieve data from computer and print it on paper. So it is also a output device.
CBT CE Full Test - 1 - Question 61

Electrostatic Precipitators are devices for

Detailed Solution for CBT CE Full Test - 1 - Question 61

The electrostatic precipitator is one of the most widely used collection devices for particulates. An electrostatic precipitator (ESP) is a particulate collection device that removes particles from a flowing gaseous stream (such as air) using the force of an induced electrostatic charge.

ESP can be operated at high temperature and pressures, and its power requirement is low. An electrostatic precipitator is a type of filter (dry scrubber) that uses static electricity to remove soot and ash from exhaust fumes before they exit the smokestacks.

CBT CE Full Test - 1 - Question 62

The only Viceroy to be assassinated in India was ________.

Detailed Solution for CBT CE Full Test - 1 - Question 62
• Richard Southwell Bourke, 6th Earl of Mayo also known as Lord Mayo in India was the only viceroy to be assassinated in India.
• Sher Ali Afridi on 8th Feb 1872, assassinated Lord Mayo, the then viceroy of India, in Port Blair.
• TRICK"Mayo" sounds like "maaro" (to kill) similar to assassination.
CBT CE Full Test - 1 - Question 63

Which of the following is used in the form of an electrolyte of the dry cell (battery)?

Detailed Solution for CBT CE Full Test - 1 - Question 63
• Ammonium chloride and zinc chloride is used in the form of an electrolyte of the dry cell (battery).
• Ammonium chloride is mixed with Plaster of Paris to form a paste, with a small amount of zinc chloride added to increase the shelf life of the battery.
• Ammonium chloride paste allows current to flow.
• Zinc chloride paste allows a dry-cell to conduct the electricity and provide electrical power to various substances.
• Zinc chloride paste used between the space of anode and cathode electrodes in a dry cell along with moist paste of ammonium chloride where zinc chloride acts as an electrolyte.
CBT CE Full Test - 1 - Question 64

A hydraulic jump occurs at the spillway. The depth before the jump is 0.2 m. The sequent depth is 3.2 m.

What is the energy dissipated in m (approximate)?

Detailed Solution for CBT CE Full Test - 1 - Question 64

The energy dissipation is given by

= 10.55 m

CBT CE Full Test - 1 - Question 65

The phenomenon of removal of material from the foundation of structure through seepage water is called as

Detailed Solution for CBT CE Full Test - 1 - Question 65

When high hydraulic gradients exist, there is a possibility that the seeping water may cause internal erosion within the dam, especially if the soil is poorly compacted.

Erosion of soil material can work its way back into the embankment, creating voids in the form of channels or ‘pipes’, and thus impairing the stability of the dam.

This form of erosion of soil material from the foundation of structure is referred to as piping and occurs when water flow upwards resulting in zero effective stress.

It is the phenomenon seen in cohesionless soil which loses its shear strength due to high upward hydraulic gradient.

The piping failure in a hydraulic structure can be prevented by-

i. Increasing the stress due to weight of the structure

ii. Increasing the creep length of the flow of water

iii. By introducing inverted filter on downstream side

CBT CE Full Test - 1 - Question 66

The minimum width to be provided for a staircase for the educational building is:

Detailed Solution for CBT CE Full Test - 1 - Question 66

Minimum Width Provisions for Stairways

The following minimum width provisions shall be made for each stairway

CBT CE Full Test - 1 - Question 67

Which layer of the atmosphere has the maximum concentration of Ozone gas?

Detailed Solution for CBT CE Full Test - 1 - Question 67
• Stratosphere layer of atmosphere has the maximum concentration of Ozone gas.
• Approximately 10 per cent of Ozone layer is present in Troposphere and rest of the 90 per cent found in Stratosphere layer of atmosphere..
• Ozone layer in Stratosphere atmosphere absorbs most of the ultraviolet radiation from the Sun.
• Stratosphere is the second layer of atmosphere whereas Troposphere is the lowest layer of the atmosphere.
• The Thermosphere is the layer of the Earth's atmosphere is above the Mesosphere.
• There are five layers of atmosphere namely- Troposphere, Stratosphere, Mesosphere, Thermosphere and Exosphere.
CBT CE Full Test - 1 - Question 68

Which one of the following is not correctly matched?

Detailed Solution for CBT CE Full Test - 1 - Question 68

Mechanical removal of garbage - Screening

Settling of BOD and other wastes due to gravity – Primary Settling

Settling of biomass – Secondary Settling

The settling of biomass is generally done in the secondary settling tank.

CBT CE Full Test - 1 - Question 69

The velocity potential function is given by ϕ = 2(x2 - y2). The velocity component at the point (-1, 4) will respectively be

Detailed Solution for CBT CE Full Test - 1 - Question 69

Given:

Velocity component can be written as

Therefore, the velocity component will be

u = 4 units

v = 16 units

CBT CE Full Test - 1 - Question 70

Bulking of sand is:

Detailed Solution for CBT CE Full Test - 1 - Question 70

The increase in moisture of sand increases the volume of sand and is known as bulking of sand.

Reason for the bulking of sand

• The reason is that moisture causes a film of water around sand particles which results in the increase of the volume of sand
• For a moisture content percentage of 5 to 8, there will be an increase in volume up to 20 to 40 per cent depending upon the sand
• If the sand is finer there will be more increase in volume

CBT CE Full Test - 1 - Question 71

If unit load moves from left to right on the Simply supported beam, the nature of ILD for the reaction is:

Detailed Solution for CBT CE Full Test - 1 - Question 71

In order to draw ILD for Reactions at any support, first we have to remove the support and then have to give unit displacement at that support. The corresponding deflected shape of the beam is the ILD for reaction at that support as shown in figure:

Let the unit load moves from the left end A to the right end B of the beam.

CBT CE Full Test - 1 - Question 72

Rigging system is used to

Detailed Solution for CBT CE Full Test - 1 - Question 72

Rigging System:

A crane is designed to pick or lift a load by means of a hoisting mechanism using ropes.

The load must be properly attached to the crane by a rigging system.

To properly attach the load, it is necessary to determine the forces that will affect the job.

Then to select and arrange the equipment that will move the load safely.

The forces involved in rigging will vary with the method of connection and the effects of motion.

The rigger must, by proper application of mechanical laws and by resolving load-movement-induced stresses, correctly determine the weight and center of gravity of the load.

CBT CE Full Test - 1 - Question 73

An object of weight 49 N is accelerated across a level surface at 0.20 m/s2. The net force acting on the object is (g = 9.8 m/s2)

Detailed Solution for CBT CE Full Test - 1 - Question 73

W = mg

49 = m × 9.8

m = 5 kg

Net Force = ma = 5 × 0.2 = 1.0 N

CBT CE Full Test - 1 - Question 74

The maximum principal strain theory failure of a material at the elastic limit is also known as

Detailed Solution for CBT CE Full Test - 1 - Question 74

The different theory of failures used in designing strength of materials are:

Maximum Principal stress theory (Rankine’s Theory)

Maximum shear stress theory (Guest – Tresca’s Theory)

Maximum Principal strain (Saint Venant’s Theory) Theory

Total strain energy per unit volume (Haigh’s Theory) Theory

Shear strain energy per unit volume Theory (Von – Mises & Hencky’s Theory)

CBT CE Full Test - 1 - Question 75

How many days, a timber may require for natural seasoning?

Detailed Solution for CBT CE Full Test - 1 - Question 75

When a tree is felled it contains about 50% or more of its dry weight as water.

So it becomes necessary to remove water from it for engineering use.

The process of drying timber efficiently is known as the seasoning of timber.

Natural Seasoning of Timber:
Natural seasoning is the process in which timber is seasoned by subjecting it to the natural elements such as air or water.

Natural seasoning takes nearly 4 - 6 months for felled trees.

CBT CE Full Test - 1 - Question 76

An identified source of irrigation water has ion concentrations of Na+, Ca++ and Mg++ as 28, 12 and 20 milliequivalents per litre, respectively. The SAR of this water is approximate:

Detailed Solution for CBT CE Full Test - 1 - Question 76

SAR =

CBT CE Full Test - 1 - Question 77

Which is the strongest concrete mix?

Detailed Solution for CBT CE Full Test - 1 - Question 77

The strongest concrete among the given ratio is 1 : 2 : 4, i.e. concrete mix proportion for M15. This is because for 6 bags of sand and coarse aggregate, one bag of cement is used to prepare the mix. Which is stronger than 1 : 5 : 10, 1 : 4 : 8 (M5) and 1 : 3 : 6 (M10) mix.

1 : 5 : 10 – 1 bag of cement for 15 bags of aggregate – weakest

1 : 4 : 8 – 1 bag of cement for 12 bags of aggregate

1 : 3 : 6 – 1 bag of cement for 9 bags of aggregate

1 : 2 : 4 – 1 bag of cement for 6 bags of aggregate – strongest

CBT CE Full Test - 1 - Question 78

Which of the following is removed through the process of aeration?

Detailed Solution for CBT CE Full Test - 1 - Question 78

Aeration of water is employed to remove the various dissolved gases like carbon dioxide and oxidizes metals like iron, manganese, hydrogen sulphide, and volatile organic chemicals (VOCs).

CBT CE Full Test - 1 - Question 79

The slump test is performed to measure

Detailed Solution for CBT CE Full Test - 1 - Question 79

Slump is a test to measure the plasticity of concrete.

Slump test is the most commonly used method of measuring consistency of concrete which can be employed either in laboratory or at site of work.

It is not a suitable method for very wet or very dry concrete.

CBT CE Full Test - 1 - Question 80

For a uniform flow depth of 2 m in a rectangular open channel having a width of 4 m and a bed slope of 0.0016, Manning’s coefficient is found to be 0.02. The velocity of the channel is

Detailed Solution for CBT CE Full Test - 1 - Question 80

Velocity in an open channel is given by

where

n = Manning’s Coefficient

R = Hydraulic radius = (Wetted Area/ Wetted Perimeter)

S = Bed Slope

CBT CE Full Test - 1 - Question 81

In Froude model law, the scale ratio for velocity (i.e. Vm/Vp) will be (Consider L= Lm/Lp)

Detailed Solution for CBT CE Full Test - 1 - Question 81

In Froude Model law,

Scale ratio for velocity (Vr = Vm/Vp) = (Lr)0.5

Scale ratio for time, Tr = (Lr)0.5

Scale ratio for discharge, Qr = (Lr)2.5

Scale ratio for Force, Fr = (Lr)3

Scale ratio for Power, Pr = (Lr)3.5

CBT CE Full Test - 1 - Question 82

Which is/are an abiotic component?

I. Sunlight
II. Plants
III. Water
IV. Animals
V. Soil
VI. Insects

Detailed Solution for CBT CE Full Test - 1 - Question 82

The natural environment components can be classified into two

1. Abiotic components
2. Biotic components

Abiotic components

These components are not living but can support other living organisms. Some kinds of such organisms are given below:

• Inorganic substances: The elements which are taken up by the plants with the help of sunlight and converted into food. The examples of such inorganic elements are like nitrogen, calcium, phosphorus, hydrogen, carbon dioxide and oxygen.
• Organic substances: The substances which are taken in the form of inorganic materials from the food source and are again sent back to the environment after decomposition by decomposers. E.g. Carbohydrates, proteins, fats etc.
• Physical factors: These factors have a direct effect on living organisms, which are climatic conditions like temperature, rainfall, wind, humidity, soil and light energy which is used by the plants for the preparation of food.
• Lithosphere: The outermost layer of the earth (i.e.) soil or land.
• Hydrosphere: Part of the earth having water resources like oceans, rivers, ponds, and lakes.
• Atmosphere: It is a cover around the earth composed by a variety of gases which protects the living organisms from various harmful cosmic radiations.

Biotic components

The area in which life is possible is called as a biosphere. All living organism in the biosphere depends upon one another and these organisms exist in the biosphere forming the following community.

• Producers: The green plants present on earth surface which produces their own food only once by the process of photosynthesis in sunlight, water, and carbon dioxide forms food for other organisms. E.g. Sugar, carbohydrates etc.
• Consumer: This organisms directly (or) indirectly depend upon the green plants for the source of food. E.g. All animals including man.
• Decomposers: These are micro-organisms which decompose the complex compounds in the dead organic matter of plants and animals and again recycle the elements into the environment. E.g. Bacteria and fungi.

​So for the given conditions:

• Biotic Components – Plants, Animals, Fungi, Insects
• Abiotic Components – Sunlight, Water, Soil.
CBT CE Full Test - 1 - Question 83

Polar moment of inertia of a hollow shaft having D and d as outer and inner diameters is given by:

Detailed Solution for CBT CE Full Test - 1 - Question 83

Polar moment of inertia of Solid cylinder:

Polar moment of inertia of Hollow Cylinder:

CBT CE Full Test - 1 - Question 84

Which one of the following polymeric materials is used for making bulletproof jackets?

Detailed Solution for CBT CE Full Test - 1 - Question 84
• Kevlar is used for making bulletproof jackets.
• Kevlar is a synthetic fiber and heat-resistant.
• It absorbs the energy of a bullet and extends it over a larger area.
• It consists of many application which includes racing sails, bicycle tyres, bulletproof jackets, and vests.
• It was developed by an American scientist Stephanie Kwolek in the year 1965.

CBT CE Full Test - 1 - Question 85

The horizontal angle that a line makes with the magnetic meridian is called:

Detailed Solution for CBT CE Full Test - 1 - Question 85

True meridian: Line or plane passing through geographical north pole and geographical south pole.

Magnetic meridian: When the magnetic needle is suspended freely and balanced properly, unaffected by magnetic substances, it indicates a direction. This direction is known as magnetic meridian. The angle between the magnetic meridian and a line is known as magnetic bearing or simple bearing of the line.

CBT CE Full Test - 1 - Question 86

Which of the following coarse aggregate require minimum cement paste?

Detailed Solution for CBT CE Full Test - 1 - Question 86

Aggregates with minimum surface area require less cement for binding.

Rounded aggregates have the minimum surface area for a given volume.

However, concrete prepared from rounded aggregates is relatively weaker than that prepared from angular aggregates.

CBT CE Full Test - 1 - Question 87

The ratio of D60 and D10 sieve sizes in the sieve analysis of granular material is called

Detailed Solution for CBT CE Full Test - 1 - Question 87

Coefficient of Uniformity / Uniformity Coefficient:

It is defined as the ratio of D60 and D10 sieve sizes in sieve analysis of granular material.

Higher is the value of Cu larger is the range of the particle size.

For uniformly graded soil, Cu = 1

For well graded sand, Cu > 6

For well graded gravel Cu > 4

Coefficient of Curvature / Curvature Coefficient:

For well graded soil, 1 < Cc < 3

For gap graded soil, 1 < Cor Cc > 3

where

D60 = size at 60% finer by weight

D30 = size at 30% finer by weight

D10 = size at 10% finer by weight = Effective size

CBT CE Full Test - 1 - Question 88

An increase in which of the following gases leads to global warming?

Detailed Solution for CBT CE Full Test - 1 - Question 88
• Carbon dioxide is responsible for trapping heat energy from the Sun within the Earth's atmosphere by preventing the rays of the Sun from escaping into the atmosphere.
• This leads to an increase in the overall temperature and this phenomenon is called global warming.
CBT CE Full Test - 1 - Question 89

Cavitation can take place in case of

Detailed Solution for CBT CE Full Test - 1 - Question 89

Cavitation in centrifugal pumps

• Cavitation is likely to occur at the inlet to the pump
• Since the pressure there is the minimum and is lower than the atmospheric pressure the formation of bubbles or cavities in liquid, developed in areas of relatively low pressure around an impeller
• The imploding or collapsing of these bubbles trigger intense shockwaves inside the pump, causing significant damage to the impeller and/or the pump housing
CBT CE Full Test - 1 - Question 90

Proper cleaning of filter with caustic soda can avoid the problem of ______ in the rapid sand filter.

Detailed Solution for CBT CE Full Test - 1 - Question 90

To avoid Mud Ball Formation:

To avoid the operational problem of mud ball formation in rapid sand filter, the filter is properly cleaned with caustic soda.

To avoid Air Binding:

Proper cleaning of filter should be done when

1. head loss becomes 2.5 to 3.5 m or
2. Negative head becomes 1.2 m.
CBT CE Full Test - 1 - Question 91

The Gross Domestic Product of a country is defined as which among the following?

Detailed Solution for CBT CE Full Test - 1 - Question 91
• The Gross Domestic Product is defined as the total value of the finished goods and services produced within the boundary of a country in a financial year.
• The GDP of India has shown a growth of 8.2% in the first quarter of the FY 2018-19.
CBT CE Full Test - 1 - Question 92

In Linux and Unix CTRL+D is used to _______.

Detailed Solution for CBT CE Full Test - 1 - Question 92

​CTRL + D closes the command line shell. This sends an EOF (End of file) marker to shell, and shell exits when it receives this marker. This is similar to running the exit command.

CBT CE Full Test - 1 - Question 93

In chain surveying, the following lines are used:

Detailed Solution for CBT CE Full Test - 1 - Question 93

In chain surveying, following lines are used

Base Lines:

It is main and longest line, which passes approximately through the center of the field.

All the other measurements to show the details of the work are taken with respect of this line.

Check Line:

A check line also termed as a proof line is a line joining the apex of a triangle to some fixed points on any two sides of a triangle.

A check line is measured to check the accuracy of the framework. The length of a check line, as measured on the ground should agree with its length on the plan.

Tie or subsidiary lines:

A tie line joints two fixed points on the main survey lines.

It helps to checking the accuracy of surveying and to locate the interior details.

The position of each tie line should be close to some features, such as paths, building etc.

CBT CE Full Test - 1 - Question 94

Which of the following is an operating system?

I. Ubuntu
II. Linux
III. Unix

Detailed Solution for CBT CE Full Test - 1 - Question 94

Ubuntu, Linux, Unix, Microsoft Windows and macOS all fall under the category of operating systems.

An Operating system is basically a low-level system software and an important program that runs on every computer. Its basic function is to perform basic tasks such as controlling peripherals, managing computer software and hardware resources, keeping track of directories and files in the storage drive, sending output to the display and more.

CBT CE Full Test - 1 - Question 95

Ramon Magsaysay Award is named after the former President of ________.

Detailed Solution for CBT CE Full Test - 1 - Question 95
• The Ramon Magsaysay Award is an annual award established to perpetuate former Philippine President Ramon Magsaysay's example of integrity in governance, courageous service to the people, and pragmatic idealism within a democratic society.
• The prize was established in April 1957 by the trustees of the Rockefeller Brothers Fund based in New York City with the concurrence of the Philippine government.
CBT CE Full Test - 1 - Question 96

The Laboratory apparatus are made of ________.

Detailed Solution for CBT CE Full Test - 1 - Question 96
• The Laboratory apparatus are made of pyrex glass. Pyrex glasses are borosilicate glasses.
• Some of the basic laboratory apparatus comprise of a volumetric flask, graduated cylinder, funnel, and beaker.
• Flint glasses are durable and heavy characterized by their high refractive quality, clarity, and brilliance.
• Crookes glasses are those which are designed to diminish the transmission of UV rays.
CBT CE Full Test - 1 - Question 97

Gagan started a business and Michael joined him after 2 months. Gagan spent Rs. 15000 while Michael spent Rs. 27,000. Their one year profit came out to Rs. 5000. How much profit will Gagan get?

Detailed Solution for CBT CE Full Test - 1 - Question 97

Ratio of profit = 15000×12 : 27000×10

= 2:3

Profit of gagan = 2/(2+3) * 5000 = 2000

CBT CE Full Test - 1 - Question 98

Kawal Tiger Reserve is in ________

Detailed Solution for CBT CE Full Test - 1 - Question 98

Kawal Tiger Reserve is located at Jannaram mandal of Mancherial District in Telangana state of India.

CBT CE Full Test - 1 - Question 99

The design sharing and bearing strength of an ordinary black bolt are 60 kN and 90 kN respectively. If the factored load is 360 kN, the number of bolts required will be

Detailed Solution for CBT CE Full Test - 1 - Question 99

Bolt value = 60 kN (minimum value of the design shearing and bearing strength)

Hence, number of bolts required = 360/60 = 6

CBT CE Full Test - 1 - Question 100

Maximum abrasion value for a base course in WBM with bituminous surfacing is

Detailed Solution for CBT CE Full Test - 1 - Question 100

CBT CE Full Test - 1 - Question 101

The depth of foundation is usually calculated from:

Detailed Solution for CBT CE Full Test - 1 - Question 101

Rankine’s formula provides the guidance on the minimum depth of foundation based on bearing capacity of the soil.

Therefore, the depth of the foundation can be expressed as

Where, Df = minimum depth of foundation, qu= ultimate bearing capacity of the soil, γ = density of soil, φφ = angle of repose or internal friction of soil.

CBT CE Full Test - 1 - Question 102

Which of the following living beings is most likely to produce greenhouse gases?

Detailed Solution for CBT CE Full Test - 1 - Question 102

Green plants are most likely to produce greenhouse gases.

• Greenhouse gases consists gases such as carbon dioxide, methane, water vapour, nitrous oxide and ozone.
• These gases absorbs heat which produced from the Sun.
• A greenhouse is called so because it is a house which contains green things such as plants and beneficial gasses.
CBT CE Full Test - 1 - Question 103

Duralumin alloy consists of Al, Mn, ________.

Detailed Solution for CBT CE Full Test - 1 - Question 103
• Duralumin alloy consists of Mg, Mn, Al, and Cu.
• Duralumin is a lightweight, strong, and hard alloy of aluminium, used widely in aircraft construction.
• It is workable, ductile, and relatable in the normal state and can be drawn and rolled into a variety of shapes.
CBT CE Full Test - 1 - Question 104

Excess nitrate in drinking water can cause

Detailed Solution for CBT CE Full Test - 1 - Question 104

An illness that begins when large amounts of nitrates in water are ingested by an infant and converted to nitrite by the digestive system. The nitrite then reacts with oxy-haemoglobin (the oxygen-carrying blood protein) to form metheglobin, which cannot carry oxygen. If a large enough amount of metheglobin is formed in the blood, body tissues may be deprived of oxygen, causing the infant to develop a blue coloration of their mucous membranes and possibly digestive and respiratory problems. This condition is also known as methemoglobinemia

CBT CE Full Test - 1 - Question 105

No deductions is made in the masonry for the openings if the area of the opening does not exceed.

Detailed Solution for CBT CE Full Test - 1 - Question 105

No deduction is made for following masonry works measurements:

(1) Opening each up to 1000sq cm 0.1 square meter

(2) Ends of beams, post, rafters, etc. up to 500 sq.cm or 0.05 sq.m in section.

(3) Bed plate, wall plate, bearing of balcony (chajja) and the like up to 10 cm depth. Bearing of floor and roof slabs are not deducted from masonry.

CBT CE Full Test - 1 - Question 106

The maximum permissible degree of curve for B.G. track in hilly area should be

Detailed Solution for CBT CE Full Test - 1 - Question 106

The maximum degree of curve permissible is

16° on the meter gauge, and

40° on the narrow gauge.

CBT CE Full Test - 1 - Question 107

Which of the following is the main constituent of Biogas after Methane?

Detailed Solution for CBT CE Full Test - 1 - Question 107
• Methane and Carbon dioxide are the main constituent of Biogas.
• Methane is produced by the anaerobic bacterial decomposition of vegetable matter under water.
• It is also known as marsh gas or swamp gas.
• Its chemical formula is CH4.
CBT CE Full Test - 1 - Question 108

Maximum camber recommended by IRC is

Detailed Solution for CBT CE Full Test - 1 - Question 108

Maximum camber recommended by IRC is 4% (on the earth surface in heavy rainfall region). If the calculated camber is more than 4% it is limited to the recommended value.

As per IRC-SP:73-2007

CBT CE Full Test - 1 - Question 109

Which of the following is used to retrieve the information through URL (e.g. http://XYZ.com) on the world wide web?

Detailed Solution for CBT CE Full Test - 1 - Question 109
• web browser is a software application for accessing information on the World Wide Web
• URL is an acronym for Uniform Resource Locator, It is a reference to the resource on the internet
• client is a computer that connects to and uses the resources of a remote computer, or server
• The server handles the request from the web browser and sends back a response to build a connection to provide web services
• Cookies are messages that web servers pass to the web browser when user visit Internet sites
CBT CE Full Test - 1 - Question 110

The major pollutant that may cause damage to prestigious monument Taj Mahal is

Detailed Solution for CBT CE Full Test - 1 - Question 110

1. Sulphur dioxide is responsible for causing damage to the prestigious monument Taj Mahal.

2. It also gets dull due to mineral impurities present in the marble get oxidised and create brown stains.

3. The Air Pollution Monitoring Laboratory at Agra has found that the level of air pollutants such as Sulphur-di-oxide and Nitrous oxide gases - are generally responsible for turning Taj Mahal yellow.

4. It happens due to a large number of power plants and industries structured around Taj Mahal.

CBT CE Full Test - 1 - Question 111

The workability of Ready-Mix Concrete shall be within the limits on the specified value for slump test as

Detailed Solution for CBT CE Full Test - 1 - Question 111

As per IS 4926:2003, clause 6.2

The work ability shall be within the following limits on the specified value as appropriate:

Slump:

+ 25 mm or + 1/3 of the specified value, whichever is less.

Compacting factor:

± 0.03, where the specified value is 0.90 or greater,

± 0.04, where the specified value is less than 0.90 but more than 0.80, and

± 0.05, where the specified value is 0.80 or less.

CBT CE Full Test - 1 - Question 112

The tensile strength of wood parallel to grains is about…………………. times its compressive strength, parallel to the grains.

Detailed Solution for CBT CE Full Test - 1 - Question 112

The compressive strength of wood parallel to grains ranges from 30-75 MPa and tensile strength varies from 85-190 MPa, which is nearly 3 times its compressive strength.

CBT CE Full Test - 1 - Question 113

Which one of the following statements include the principle of surveying?

Detailed Solution for CBT CE Full Test - 1 - Question 113

There are two fundamental principles of surveying, these are:

1) To work from whole to the part

2) To fix the positions of new stations by at least two methods

CBT CE Full Test - 1 - Question 114

What is Syzygy?

Detailed Solution for CBT CE Full Test - 1 - Question 114
• When two or more celestial bodies arrange themselves in a straight line due to their own revolution it is known as a syzygy.
• All eclipses are syzygy but, not all syzygy are eclipses.
• For example, the full moon and new moon are syzygy involving the lining up of the Sun, Earth and Moon so, lunar and solar eclipses are syzygy.
CBT CE Full Test - 1 - Question 115

The first page of a web site is called its:

Detailed Solution for CBT CE Full Test - 1 - Question 115

The home page is the first page that we see when a website is opened on the web browser. It is also called the start page or the main page, though home page is a more commonly used name. It is generally made attractive and contains various hyperlinks to different pages within the web site to attract visitors to its site. Some web sites require users to login to the web site to access the home page.

CBT CE Full Test - 1 - Question 116

Fly ash is the environmental pollutant generated by

Detailed Solution for CBT CE Full Test - 1 - Question 116

Fly ash, also known as "pulverised fuel ash" is a coal combustion product composed of fine particles that are driven out of the boiler with the flue gases in thermal power plant.

CBT CE Full Test - 1 - Question 117

In January 2019, Krishna Sobti passed away. She was a famous ________.

Detailed Solution for CBT CE Full Test - 1 - Question 117
• Krishna Sobti was a famous Hindi writer and essayist.
• She had won the Sahitya Akademi Award in 1980 for her novel Zindaginama.
• She was awarded the Jnanpith in 2017 for her contribution to Indian literature.
• Some of her celebrated works include Daar Se Bichhudi, Mitro Marjani, Zindaginama, Dil-o-Danish etc.
CBT CE Full Test - 1 - Question 118

In a hot bituminous plant, while liquid asphalt is combined with the aggregate for mixing, the temperature of the asphalt should be in the range of

Detailed Solution for CBT CE Full Test - 1 - Question 118

When liquid asphalt is combined with the aggregate for mixing, the temperature of the asphalt should be in the range of 300°F.

Drum and batch plants are the two most common plant types for hot-mixed asphalt. Therefore, both drum mix and batch plants have heating systems to keep the liquid asphalt at the required temperature.

If asphalt is delivered at a cooler temperature, the system must be capable of raising the temperature of the delivered asphalt cement.

The two methods commonly used for heating liquid asphalt are the direct fire and the hot oil processes.

CBT CE Full Test - 1 - Question 119

What is the total degree of indeterminacy both internal and external of the plane frame shown below?

Detailed Solution for CBT CE Full Test - 1 - Question 119

Static Indeterminacy (DS)

DS = Dse + Dsi

Dse = External static indeterminacy

Dsi = Internal static indeterminacy

Dse = Re – R

Where

Re = Total number of independent support reaction

R = Total number of available equations of static equilibrium

Dsi = 3 × C - Rr

where

C = number of closed loops

Rr = total number of internal reactions released.

Alternative

Ds = 3 × C – R’

Where,

C = number of cuts required to make it cantilever beam.

R’ = number of reactions applied to make all joints rigid and number of restrained required to make the hinged joint rigid (m - 1)

m = number of members meeting at the hinge

C = 7

R’ = 2 × (m - 1)

R’ = 2 × (4 - 1)

R’ = 6

∴ Ds = 3 × 7 – 6

Ds = 15

Alternative

Dse = 3 × 4 – 3

Dse = 9

Dsi = 3 × 4 – (2 × 3)

Dsi = 12 – 6 = 6

Ds = Dse + Dsi

= 9 + 6

= 15

CBT CE Full Test - 1 - Question 120

Which of the following equipment used in compaction below the surface uses the principle of kneading action?

Detailed Solution for CBT CE Full Test - 1 - Question 120

Compaction of the soil in the field can be achieved through the action of pressure, impact, vibration or kneading.

Sheepsfoot Rollers:

These are surface rollers that apply the principle of kneading action to affect compaction below the surface.

They are suitable for all types of soil but are preferred for cohesive soil.

Smooth Wheeled Roller:

These are surface rollers that apply the principle of pressure action to affect compaction below the surface.

These are suitable for the compaction of cohesionless soil.

Rammers:

These are equipment that applies the principle of impact action to affect compaction below the surface.

They are suitable for all types of soil but are preferred for cohesionless soil.

Vibrators:

These are surface rollers that apply the principle of vibration action to affect compaction below the surface.

These are suitable for the compaction of cohesionless soil.

It is the best method used for the compaction of the sand.

CBT CE Full Test - 1 - Question 121

A set of programs which enables computer hardware and software to work together is called

Detailed Solution for CBT CE Full Test - 1 - Question 121

System software is a type of computer program that is designed to run a computer's hardware and application programs. If we think of the computer system as a layered model, the system software is the interface between the hardware and user applications.

CBT CE Full Test - 1 - Question 122

The value of the property during its useful life based on the purchase value and depreciation etc. is known as:

Detailed Solution for CBT CE Full Test - 1 - Question 122

Book value is the value of asset recorded on the accounting books of the firm at a given time period. It is generally calculated at the end of each year. Book value at the end of a given year equals the initial cost less the total depreciation amount till that year.

Salvage value represents estimated market value of the asset at the end of its useful life. It is the expected cash inflow that the owner of the asset will receive by disposing it at the end of useful life.

Useful life represents the expected number of years the asset is useful in terms of generating revenue. The asset may still be in working condition after the useful life but it may not be economical. Useful life is also known as depreciable life. The asset is depreciated over its useful life. Scrap Value implies that the asset has no further useful life.

CBT CE Full Test - 1 - Question 123

Candela is the unit of ________.

Detailed Solution for CBT CE Full Test - 1 - Question 123
• Candela (Cd) is the SI unit of luminous intensity.
• Luminous intensity is a measure of the amount of visible light emitted from a point source per unit time per unit solid angle.
CBT CE Full Test - 1 - Question 124

The most durable varnish is:

Detailed Solution for CBT CE Full Test - 1 - Question 124
• Varnish is a nearly homogeneous solution of resin in oil, alcohol or turpentine
• Oil-based varnish is the most durable finish that can be easily applied by the average woodworker
• This varnish surpasses most other finishes in its resistance to
• water,
• heat,
• solvents
• other chemicals
CBT CE Full Test - 1 - Question 125

The fore bearing of line AB is 50°. The included angle ABC is 240°. The FB of line BC is:

Detailed Solution for CBT CE Full Test - 1 - Question 125

FB of forward line = FB of backward line + included angle;

If sum is more than 180°, deduct 180°

If sum is more than 540°, deduct 540°

If sum is less than 180°, add 180°

FB of line BC = 50 + 240 = 290°. Sum is more than 180°, hence deducting 180°, we get FB of line BC = 290- 180 = 110°.

CBT CE Full Test - 1 - Question 126

Deduction at the L-junction of the wall for the total length of the central line is __________.

Detailed Solution for CBT CE Full Test - 1 - Question 126

In the Centre-line method at the L-joint area will be calculated twice when take-off quantity. So, this area should be deducted once from the measurement when take-off quantity. But there is no reduction in at the L-junction of a wall for the total length of the central line in this method.

CBT CE Full Test - 1 - Question 127

Which mirror is used by doctors to examine the eyes, ears, nose, and throat?

Detailed Solution for CBT CE Full Test - 1 - Question 127
• When the object is between the centre of curvature and focus or between focus and pole of a concave mirror, the image formed is virtual, erect and magnified.
• Therefore, doctors use concave mirrors to examine the eyes, ears, nose,and throat from a close range as the image formed is enlarged and provides a better view to the doctor.
CBT CE Full Test - 1 - Question 128

The acceleration due to gravity, g

Detailed Solution for CBT CE Full Test - 1 - Question 128

Acceleration due to the gravity of the Earth:

When a body is dropped from a certain height above the ground, it begins to fall towards the earth under gravity. The acceleration produced in the body due to gravity is called the acceleration due to gravity. It is denoted by g. Its value close to the Earth’s surface is 9.8 m/s2.

Variation in acceleration due to gravity:

The value of g varies from place to place on the surface of the earth.

Variation in g with height or altitude:

G decreases on going up a height h above the surface of the earth.

Variation in g with depth:

Value of g decreases as we go down below the surface of the earth.

CBT CE Full Test - 1 - Question 129

The lining of the canal will lead to:

Detailed Solution for CBT CE Full Test - 1 - Question 129

The laying of the impervious layer which protects the bed and sides of the canal is called canal lining. The lining of the canal is necessary for the following reasons:

(a) to minimise the seepage losses through the bed and sides of the canal.

(b) to prevent scouring and erosion of bed and sides of the canal due to high velocity of flood water at the time of heavy rainfall.

(c) increase the discharge in the canal section by increasing the velocity.

(d) to prevent the growth of weeds along the bed and sides of the canal.

(e) to increase the command area

CBT CE Full Test - 1 - Question 130

Detailed Solution for CBT CE Full Test - 1 - Question 130

Putty is made by mixing a base of whiting (finely ground chalk) with linseed oil in various proportions.

CBT CE Full Test - 1 - Question 131

The art of dressing of edges of timber pieces so as to make them straight and square with the face is called _______

Detailed Solution for CBT CE Full Test - 1 - Question 131

The following are the technical terms commonly used in carpentry

1. Shooting: The art of dressing of edges of timber pieces so as to make them straight and square with the face.
2. Rebating: The process of preparing a rectangular portion on the edge of a timber piece so as to receive another timber piece which is also similarly cut.
3. Sawing: The art of cutting of wood by means of the saws is known as the sawing.
4. Studding: The fixing of small timber battens to the timber walls to which laths and boards are to be nailed.
CBT CE Full Test - 1 - Question 132

Approximately what percentage of water supplied in the community enter into the sanitary sewerage system?

Detailed Solution for CBT CE Full Test - 1 - Question 132

Sanitary sewage is mostly the spent water of the community draining into the sewer system.

It has been observed that a small portion of spent water is lost in evaporation, seepage in ground, leakage, etc.

Usually 80% of the water supply may be expected to reach the sewers.

CBT CE Full Test - 1 - Question 133

The minimum edge distance in member with a rolled edge (for bolted hand cut connection) is approximately

Detailed Solution for CBT CE Full Test - 1 - Question 133

Specification for pitch of bolts or rivets

1. Minimum pitch and minimum gauge length

= {2.5 × nominal diameter of the bolt

2. Minimum end and edge distance

3. Maximum end and edge distance

= {12 × t × ϵ,
Where, ϵ =

fy = yield stress

t = thickness of thinner plate

CBT CE Full Test - 1 - Question 134

The following equation is a representation of which law?

Detailed Solution for CBT CE Full Test - 1 - Question 134
• V is,  is a representation of the Combined Gas Law.

• This law is obtained by combining Gay-Lussac's Law, Boyles's Law and Charles's Law.
• Boyle's Law is represented as P 1V= P2V2, P is pressure and V is the volume.
• Charles' Law is represented as V1T= V2T1,  V is the volume whereas T is the temperature.
• Graham's Law states that the rate of effusion of a gas is inversely proportional to the square root of the mass of its particles.
CBT CE Full Test - 1 - Question 135

When temperature increases, viscosity of the soil __________ where its permeability_________

Detailed Solution for CBT CE Full Test - 1 - Question 135

Permeability (k) =
As we know, with increase in temperature viscosity of fluid decreases (Soil contains water inside its pores), so overall viscosity of soil reduces.

Further, Viscosity of soil is inversely proportional to its permeability from the above relation. Therefore, with decrease in viscosity of soil, permeability increases.

CBT CE Full Test - 1 - Question 136

"Forests" is listed in the _________ list given in the Seventh Schedule in the Constitution of India.

Detailed Solution for CBT CE Full Test - 1 - Question 136

Through the 42nd Amendment Act of 1976 five subjects were transferred from State to Concurrent List. They are: 1. Education 2. Forests 3. Weights & Measures 4. Protection of Wild Animals and Birds 5. Administration of Justice

CBT CE Full Test - 1 - Question 137

Which of the following statement is correct about the value of acceleration due to gravity at the poles?

Detailed Solution for CBT CE Full Test - 1 - Question 137
• Due to the equatorial bulge, i.e. the equator being more bulged towards the outside, the poles are nearer to the Centre of the earth, as compared to the equatorial region.
• And as the acceleration due to gravity is inversely proportional to the distance from the Centre of the earth, as the distance is less on poles, the acceleration due to gravity(g) is more at the poles.
CBT CE Full Test - 1 - Question 138

Drift method of tunneling is used to construct a tunnel in

Detailed Solution for CBT CE Full Test - 1 - Question 138

Drift method of Tunneling:

A drift is a small tunnel measuring 3 m x 3 m, which is driven into the rocks and whose section is expanded in the later processes till it acquire the size of the tunnel.

A number of drill holes are provided all around the drift and these are filled up with explosives and ignited so that the size of the drift expands to become equal to the required cross section of the tunnel.

(a) If the quality of the rock is bad or if it contains excessive water, this is detected in advance and corrective measures can then be taken in time.

(b) A drift assists in the ventilation of tunnels.

(c) The quantity of explosives required is less.

(d) A side drift allows the use of timber to support the roof.

(a) It is a time-consuming process, as the excavation of the main tunnel gets delayed till the drift is completed.

(b) The cost of drilling and removing the muck from the drift is high, as the work has to be done using manually operated power-driven equipment.

CBT CE Full Test - 1 - Question 139

A soil sample has a porosity of 40 percent, its void ratio is

Detailed Solution for CBT CE Full Test - 1 - Question 139

Given:

Porosity, η = 40%

Void, Ratio, e =

CBT CE Full Test - 1 - Question 140

With a percentage increase of carbon in steel, decreases its ________.

Detailed Solution for CBT CE Full Test - 1 - Question 140

Ductility is the ability of material to deform under stress. With increase in carbon content the strength, hardness and brittleness increases but the ductility and toughness decreases.

CBT CE Full Test - 1 - Question 141

When did the Constituent Assembly adopt Constitution?

Detailed Solution for CBT CE Full Test - 1 - Question 141
• The Constitution of India was adopted by the Constituent Assembly on 26th November, 1949 but it came into force on 26th January, 1950.
• Constitution of India is known as the supreme law of India which consists of fundamental political codes, powers, procedures, structures and the duties of the government institutions, directive principles and the duties of the citizen.
• It is the longest written constitution of any country in the world.
• B.R. Ambedkar was considered to be its chief architect as he was the Chairman of the Drafting Committee
CBT CE Full Test - 1 - Question 142

The Geological formations, that is porous but less permeable, contain water but transmits water at a slow rate is called as

Detailed Solution for CBT CE Full Test - 1 - Question 142

Different types of geological formations:

1. Aquitard are porous but less permeable geological formations from which water cannot flow but instead sieves through it.

2. Aquifers are porous and permeable geological formations from which sufficient discharge can be extracted.

3. Aquiclude are porous but impermeable geological formations from which discharge cannot be extracted.

4. Aquifuge are neither porous nor permeable geological formations.

CBT CE Full Test - 1 - Question 143

Head loss in a flowing fluid is experienced due to _____.

A. Friction at surface
B. Change of direction
C. Change of section of the passage
D. Obstruction in passage

Detailed Solution for CBT CE Full Test - 1 - Question 143

The head loss represents the reduction in the total head or pressure of the fluid as it flows through a hydraulic system. The head loss that occurs in pipes is dependent on the flow velocity, the viscosity of the fluid, pipe diameter and length, changes in direction of the fluid and a friction factor based on the roughness of the pipe and the Reynolds number of the flow.

CBT CE Full Test - 1 - Question 144

Which of the following decisive battles had established the dominion of the British in India?

Detailed Solution for CBT CE Full Test - 1 - Question 144

The Battle of Buxarwas fought on 22-23 October 1764 between the forces under the command of the British East India Company led by Hector Munro and the combined armies of Mir Qasim, Nawab of Bengal till 1763; the Nawab of Awadh; and the Mughal Emperor Shah Alam.

• The combined armies of Mughals, Awadh and MirQasim were defeated by the British army.
• Treaty of Allahabad was signed after the battle of Buxar.
CBT CE Full Test - 1 - Question 145

Which of the following properties of water is determined using ethylene diamine tetra acetic acid solution?

Detailed Solution for CBT CE Full Test - 1 - Question 145

Eriochrome black T is used as an indicator while titrant is ethylene – di – amine – tetracetic acid (EDTA).

CBT CE Full Test - 1 - Question 146

The principal rafter is designed as a:

Detailed Solution for CBT CE Full Test - 1 - Question 146

Principal rafter is the top chord member of truss and is subjected to compressive forces from loads transferred by purlins at the nodes. The rafters act as simple supported beams between the purlins, either with or without cantilever.

CBT CE Full Test - 1 - Question 147

Testing of chlorine residue in water is done through

Detailed Solution for CBT CE Full Test - 1 - Question 147

The amount of chlorine residue left in the chlorinated water is experimentally determine by the following test:

1. Orthotolidine test
2. DPD test
3. Chlorotex test
4. Starch Iodide test
CBT CE Full Test - 1 - Question 148

An area of 64 square kilometer is represented by 256 square centimeters on a map. The R. F. of the scale is

Detailed Solution for CBT CE Full Test - 1 - Question 148

Representative Factor, RF is 256 cm2 = 64 cm2

Factor for measuring area is given by

CBT CE Full Test - 1 - Question 149

Detailed Solution for CBT CE Full Test - 1 - Question 149

Scaffolding:

Scaffolding is a temporary structure to support the original structure.

It is also used by the workers as a platform to carry on the construction works.

Types of scaffolding vary with the type of construction work.

Scaffolding is made up of timber or steel.

It should be stable and strong to support workmen and other construction material placed on it.

Bamboo is one of the most widely used and suitable material for scaffolding in India.

CBT CE Full Test - 1 - Question 150

What is the formula of Ethanoic acid?

Detailed Solution for CBT CE Full Test - 1 - Question 150
• Acetic acid, commonly named ethanoic acid, is a colorless liquid organic compound with the chemical formula CH3COOH.
• When undiluted, it is sometimes called glacial acetic acid.

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