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RRB JE ME (CBT II) Mock Test- 4


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150 Questions MCQ Test RRB JE Mock Test Series for Mechanical Engineering (ME) | RRB JE ME (CBT II) Mock Test- 4

RRB JE ME (CBT II) Mock Test- 4 for Railways 2022 is part of RRB JE Mock Test Series for Mechanical Engineering (ME) preparation. The RRB JE ME (CBT II) Mock Test- 4 questions and answers have been prepared according to the Railways exam syllabus.The RRB JE ME (CBT II) Mock Test- 4 MCQs are made for Railways 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for RRB JE ME (CBT II) Mock Test- 4 below.
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RRB JE ME (CBT II) Mock Test- 4 - Question 1

Who among the following has been given the award for sportswoman of the year in Laureus World Sports Awards 2019?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 1 The Laureus World Sports Awards 2019 were presented on 18 February 2019 to honour the greatest sporting achievements of 2018 and celebrate the power of sport to change the world. Sportswoman of the Year was given to Simone Biles (USA) Gymnastics.
RRB JE ME (CBT II) Mock Test- 4 - Question 2

Which of the following Indian water missions was awarded with “Public Water Agency of the Year” at the Global Water Summit 2019 in London?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 2 The National Mission for Clean Ganga (NMCG) was awarded the distinction of “Public Water Agency of the Year” by Global Water Intelligence at the Global Water Summit in London.
RRB JE ME (CBT II) Mock Test- 4 - Question 3

Who is the Author of the book, ``The Oxford India Gandhi — Essential Writings”?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 3 The Oxford India Gandhi — Essential Writings’ authored by Gopalkrishna Gandhi. The Oxford India Gandhi looks beyond the plaster-cast image of Mohandas Karamchand Gandhi, the Mahatma.
RRB JE ME (CBT II) Mock Test- 4 - Question 4

Folk dance "Lai Haraoba" is popular in which Indian state?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 4 One important festival of Manipur is Lai-Haraoba and is celebrated in the month of May. The word Lai Haraoba means ‘Festivity of the Gods' and is a native festival of the Meiteis. Meiteis are the majority ethnic groups of the state of Manipur.
RRB JE ME (CBT II) Mock Test- 4 - Question 5

Which of the following marriages was NOT considered legal in ancient India?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 5 In Hindu Marriage System, there are eight types of marriages mentioned, grouped into Prashasta or Approved or Desirable marriages and Aprashasta or Disapproved or Undesirable marriages. Gandharva Vivah is a prashasta form of marriage, in which the bride and groom marry without the consent of family and kinsman.
RRB JE ME (CBT II) Mock Test- 4 - Question 6

During the reign of which Mughal ruler was the 'Jizya' re-imposed?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 6 Jizya was abolished by the third Mughal emperor Akbar, in 1564. It was finally abolished in 1579. However, Aurangzeb, the sixth emperor, re-introduced and levied jizya on non-Muslims in 1679.
RRB JE ME (CBT II) Mock Test- 4 - Question 7

Ujjain is situated on the banks of which river?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 7 Ujjain is an ancient city beside the Kshipra River in the central Indian state of Madhya Pradesh.
RRB JE ME (CBT II) Mock Test- 4 - Question 8

Where are the Nandi hills located?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 8 Nandi Hills, or Nandidurg, is a hill fortress in the south Indian state of Karnataka. Tipu Sultan Fort, a summer retreat of Mysore's Tipu Sultan, features stone carvings and wall paintings.
RRB JE ME (CBT II) Mock Test- 4 - Question 9

Which of the following channels separates Amino dive from Lakshadweep?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 9 The Laccadive Islands or Cannanore Islands are one of the three island subgroups in the Union Territory of Lakshadweep. 7 Degree channel separates Amino dive from Laccadive, while 8 degree channel separates the Maldives from Lakshadweep.
RRB JE ME (CBT II) Mock Test- 4 - Question 10

Where do we find the ideals of Indian democracy in the Constitution?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 10 The term 'Preamble' refers to the introduction of the preface to the Constitution. It embodies the source of the Constitution, i.e., the people of India. The terms sovereign, socialist, secular, democratic, a republic in the Preamble suggest the state’s nature.
RRB JE ME (CBT II) Mock Test- 4 - Question 11

What is the maximum number of seats fixed for Lok Sabha in India?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 11 Correct Option is 2 : 552 seats

The maximum strength of the House allotted by the Constitution of India is 552. Currently, the house has 545 seats which is made up by the election of up to 543 elected members and at a maximum, 2 nominated members of the Anglo-Indian Community by the President of India.

RRB JE ME (CBT II) Mock Test- 4 - Question 12

What is the function of a political pressure group in democracy?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 12 The pressure groups supplement electoral democracy, they keep the government in touch with public opinion between elections. Elections take place once in five year, but the pressure groups engage the government in an ongoing dialogue with the people. Similarly, the pressure groups give political voice to minority and vulnerable sections of the society. Moreover, pressure groups raise concerns about various social issues such as fundamental rights and liberties, poverty, environment, domestic violence etc.
RRB JE ME (CBT II) Mock Test- 4 - Question 13

The first mega food park of Rajasthan has come up in which city?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 13 The first mega food park of Rajasthan was inaugurated by Union Minister for Food Processing Industries Harsimrat Kaur Badal at Roopangarh village near Ajmer. The Park is expected to provide employment to around 5 thousand persons. Rajasthan is the fourth largest producer of food grains in India and leader in mustard, guar seed, coriander, groundnut, fennel, soybean, gram, and oilseeds.
RRB JE ME (CBT II) Mock Test- 4 - Question 14

Who is the principal regulatory authority for the stock market in India?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 14 SEBI (Securities and Exchange Board of India) is the regulator for the securities market in India. It was established in 1988 and given statutory powers on 30 January 1992 through the SEBI Act, 1992.
RRB JE ME (CBT II) Mock Test- 4 - Question 15

Which of the following is a component of M-1?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 15 Checkable deposits are a component of M-1. M-1 is the money supply that includes physical currency and coins, demand deposits, travellers’ checks, other checkable deposits and negotiable order of withdrawal (NOW) accounts. The most liquid portions of the money supply are measured by M1 because it contains currency and assets that can be quickly converted to cash.
RRB JE ME (CBT II) Mock Test- 4 - Question 16

The magnifying power of a telescope is 9. When adjusted for parallel rays, the distance between the objective and the eyepiece is 20cm. The focal length of the lenses are-

RRB JE ME (CBT II) Mock Test- 4 - Question 17

In the circuit, the equivalent resistance between A and B is–

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 17

The circuit is equivalent to the following. It is a balanced Wheatstone bridge between abcd and then in parallel (2R) resistances. Thus ignoring resistance between the arms. The circuit is equivalent to three (2R's) resistances in parallel (abc, adc, aRRc).

RRB JE ME (CBT II) Mock Test- 4 - Question 18

In the production of wave energy, which form of energy is used?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 18 The water in the sea rises and falls because of waves on the surface. Wave machines use Kinetic energy in this movement to drive electricity generators. Wave energy is also known as ocean energy. Wave energy is essentially power drawn from waves.
RRB JE ME (CBT II) Mock Test- 4 - Question 19

Two electric bulbs, one of 200 volt 40 watts and the other 200 volts 100 watts are connected in the house wiring circuit

RRB JE ME (CBT II) Mock Test- 4 - Question 20

A metal bar may be heated electronically by-

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 20 Induction heating is often used to heat an item causing it to expand prior to fitting or assembly. Bearings are routinely heated in this way using utility frequency (50/60 Hz) and a laminated steel transformer type core passing through the centre of the bearing.
RRB JE ME (CBT II) Mock Test- 4 - Question 21

The motion of a simple pendulum is an example of-

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 21
  • When a pendulum bob is displaced from equilibrium and then released, it begins it’s back and forth vibration about its fixed equilibrium position.

  • The motion is regular and repeating, an example of periodic motion.

RRB JE ME (CBT II) Mock Test- 4 - Question 22

When parallel beams of light fall on a convex mirror, then :

A.: They undergo reflection satisfying

B: They get reflected as if they are coming from the focus

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 22

Both options are correct. should be equal because incident ray and reflected ray make the same angle with the normal of the plane. In the 2nd option, the lines which are parallel to the axis meet at the focus and appear like they are coming from focus.

RRB JE ME (CBT II) Mock Test- 4 - Question 23

What is the full form of COMPUTER?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 23 COMPUTER stands for Common Operating Machine Purposely Used for Technological and Educational Research. Computer is an electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program.
RRB JE ME (CBT II) Mock Test- 4 - Question 24

ASCII stands for __________.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 24 ASCII abbreviated from American Standard Code for Information Interchange, is a character encoding standard for electronic communication. ASCII codes represent text in computers, telecommunications equipment, and other devices.
RRB JE ME (CBT II) Mock Test- 4 - Question 25

The hexadecimal equivalent of a binary 111111110010 is ________.

RRB JE ME (CBT II) Mock Test- 4 - Question 26

What is the base of the octal number system ?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 26 The base of the octal number system is 8.

It uses the digits 0 to 7. Octal numerals can be made from binary numerals by grouping consecutive binary digits into groups of three (starting from the right).

RRB JE ME (CBT II) Mock Test- 4 - Question 27

Which one of the following is not part of an OS?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 27 Music and video files are not present in OS, except a few basic tunes and logo of the company.
RRB JE ME (CBT II) Mock Test- 4 - Question 28

Which one of the following is not an application software package?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 28 Redhat Linux is an open source operating system which is assembled by the company Red Hat.
RRB JE ME (CBT II) Mock Test- 4 - Question 29

Which of the following is considered as the fastest printer?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 29
  • A laserjet printer has a good print speed among laser, inkjet, bubble jet, and dot matrix printers.

  • Laser printing is an electrostatic digital printing process.

  • It produces high-quality text and graphics.

RRB JE ME (CBT II) Mock Test- 4 - Question 30

Which of the following is not a pointing device?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 30 Pointing device is a generic term for any device (e.g., among laser, inkjet, bubble jet, and dot matrix printersA a graphics tablet, mouse, stylus, or trackball) used to control the movement of a cursor on a computer screen. A keyboard is defined as the set of typewriter-like keys that enables you to enter data into a computer or other devices.
RRB JE ME (CBT II) Mock Test- 4 - Question 31

Which of the following acts as the central nervous system for other components of the computer system?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 31 The control unit acts as the central nervous system for other components of the computer system. The control unit is a component of a computer's central processing unit that directs the operation of the processor. It tells the computer's memory, arithmetic, and logic unit and input and output devices how to respond to the instructions that have been sent to the processor.
RRB JE ME (CBT II) Mock Test- 4 - Question 32

NAND gate is the combination of--

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 32

This is a NOT-AND gate which is equal to an AND gate followed by a NOT gate.

RRB JE ME (CBT II) Mock Test- 4 - Question 33

___________ is the process of restoring a forest that once existed but was removed at some point of time in the past.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 33 Reforestation is the natural or intentional restocking of existing forests and woodlands (forestation) that have been depleted, usually through deforestation. Reforestation can be used to rectify or improve the quality of human life by soaking up pollution and dust from the air, rebuilding natural habitats and ecosystems, and mitigating global warming.
RRB JE ME (CBT II) Mock Test- 4 - Question 34

Which among the following is not a natural ecosystem?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 34
  • The natural ecosystem is a community of living and nonliving organisms, where each component interacts together as a unit through biological, physical and chemical processes.

  • The distinctiveness of natural ecosystems is that they are purely natural and their formations are not in any way influenced by human activity.

  • Natural ecosystems may be terrestrial (such as a desert, forest, or meadow) or aquatic (a pond, river, or lake).

RRB JE ME (CBT II) Mock Test- 4 - Question 35

The term 'brown air' is used for-

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 35 Photochemical smog is a type of smog produced when ultraviolet light from the sun reacts with nitrogen oxides in the atmosphere. It is visible as a brown haze, and is most prominent during the morning and afternoon, especially in densely populated, warm cities and is known as 'brown air'.
RRB JE ME (CBT II) Mock Test- 4 - Question 36

The word monsoon refers to ___________.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 36 The word monsoon refers to Changing direction of winds. Monsoon is traditionally defined as a seasonal reversing wind accompanied by corresponding changes in precipitation, but is now used to describe seasonal changes in atmospheric circulation and precipitation associated with the asymmetric heating of land and sea.
RRB JE ME (CBT II) Mock Test- 4 - Question 37

The process that divides the day from night on the globe is called the circle of ..............

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 37
  • The circle that divides the day from night on the globe is called the circle of illumination.

  • The circle of illumination is at the right angle to the orbital plane.

RRB JE ME (CBT II) Mock Test- 4 - Question 38

The following city, which was declared as 'Tiger Gateway of India', is_________

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 38 Nagpur was declared as the 'Tiger Gateway of India.’ The declaration of Nagpur as the Gateway to the Tiger Land came after the much lauded and successful campaign 'Nagpur roars of Waghpur'.
RRB JE ME (CBT II) Mock Test- 4 - Question 39

Which temperature zone is known as the surplus zone?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 39 The tropics are a region of the Earth surrounding the Equator. They are delimited in latitude by the Tropic of Cancer in the Northern Hemisphere at 23°26′13.2″ (or 23.43699°) N and the Tropic of Capricorn in the Southern Hemisphere at 23°26′13.2″ (or 23.43699°) S; these latitudes correspond to the axial tilt of the Earth. The tropics are also referred to as the tropical zone and the torrid zone. The tropics include all the areas on the Earth where the Sun contacts the zenith, a point directly overhead, at least once during the solar year (which is a subsolar point).
RRB JE ME (CBT II) Mock Test- 4 - Question 40

All the interacting organisms in an area together with the non-living constituents of the environment form an _____.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 40 All the interacting organisms in an area together with the non-living constituents of the environment form an Ecosystem. The study of the ecosystem is called ecology.
RRB JE ME (CBT II) Mock Test- 4 - Question 41

'Rn' is the chemical symbol of which element?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 41 Correct Option is b : Radon

Radon is a chemical element with the symbol Rn and atomic number 86. It is a radioactive, colorless, odorless, tasteless, noble gas.

RRB JE ME (CBT II) Mock Test- 4 - Question 42

What is the chemical name of vinegar?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 42 Correct Option is a : Acetic acid

Acetic acid is the chemical name of vinegar. Vinegar is an aqueous solution of acetic acid. It has a wide variety of industrial and domestic uses, such as its use as a household cleaner. Acetic acid has a distinctive sour taste and pungent smell.

RRB JE ME (CBT II) Mock Test- 4 - Question 43

Which of the following is not a transition metal?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 43 Correct Option is d : Radium

In chemistry, the term transition metal has three possible meanings: The IUPAC definition defines a transition metal as "an element whose atom has a partially filled d subshell, or which can give rise to cations with an incomplete d subshell.” Radium is not a transition metal.

RRB JE ME (CBT II) Mock Test- 4 - Question 44

Isobars are atoms of different chemical elements that have ______.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 44 Isobars are atoms of different chemical elements that have the same mass number but different atomic numbers.
RRB JE ME (CBT II) Mock Test- 4 - Question 45

In nuclear reactors, cadmium rods are used as which of the following?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 45 In nuclear reactors, cadmium rods are used as Controllers. Control rods are used in nuclear reactors to control the fission rate of uranium and plutonium. They are composed of chemical elements such as boron, silver, indium and cadmium that are capable of absorbing many neutrons without fissioning themselves.
RRB JE ME (CBT II) Mock Test- 4 - Question 46

What is the number of groups and periods in the modern periodic table?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 46 18, 7 is the number of groups and periods in the modern periodic table. The periodic table is structured as an 18 X 7 grid, positioned above a smaller double row of elements. The periodic table only lists chemical elements, and includes each isotope of each element within one cell.
RRB JE ME (CBT II) Mock Test- 4 - Question 47

Which of the following types of medicine is used for treating indigestion?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 47 Antacid is used for treating indigestion

Antibiotics inhibit the growth of or destroy microorganisms.

Analgesic is a pain-relieving medication.

Antiseptics are antimicrobial medicine applied to living tissue/skin to reduce the possibility of infection, sepsis, or putrefaction.

RRB JE ME (CBT II) Mock Test- 4 - Question 48

Not servicing the vehicles results in incomplete combustion of carbonaceous matter in the automobile engine which generates: ______________.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 48
  • Incomplete combustion occurs when the supply of air or oxygen is poor.

  • Water is still produced, but carbon monoxide and carbon are produced instead of carbon dioxide.

  • Carbon monoxide is a poisonous gas, which is one reason why complete combustion is preferred to incomplete combustion.

RRB JE ME (CBT II) Mock Test- 4 - Question 49

A metal sulphate's chemical formula MSO4 . A chloride of the same metal will have the formula.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 49 The chemical formula of metal sulphate is MSO4 as the valency of the metal M++ will be 2 as the valency of SO4-- is 2. The chemical formula of its chloride(Cl2-- ) of the metal is MCl2 .
RRB JE ME (CBT II) Mock Test- 4 - Question 50

In which of the following solutions the concentration of H+ ion is the maximum?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 50 the concentration of H+ ion is the maximum in pH 5.
RRB JE ME (CBT II) Mock Test- 4 - Question 51

Specific speed of a fluid machine

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 51 Specific speed of a fluid machine is a type number representative of its performance.

In order to compare the performance of different pumps, it is necessary to have some term which will be common to all the centrifugal pumps; the term ordinarily used for this purpose is the specific speed. This is a type characteristic and can be used to predict the behavior of one pump based on tests of similar, but different sized pumps.

The specific speed is a characteristic of pumps which can be used as a basis for comparison of the performance of different pumps.

RRB JE ME (CBT II) Mock Test- 4 - Question 52

Air vessel are used in reciprocating pumps in order to

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 52 Air vessels are used in reciprocating pumps in order to minimize the delivery head fluctuation.
RRB JE ME (CBT II) Mock Test- 4 - Question 53

For a given centrifugal pumps,

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 53

The dimensionless number for centrifugal pump is

Hence discharge is directly proportional to speed.

RRB JE ME (CBT II) Mock Test- 4 - Question 54

The component of torque converter that allows torque multiplication is

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 54 A hydraulic torque converter consists of a series of fixed guide vanes which are provided between turbine runner and pump impeller. The liquid exerts a torque on the driven unit through these stationary guide vanes as it flows from pump to turbine runner.
RRB JE ME (CBT II) Mock Test- 4 - Question 55

Measurement of temperature is based on which law of thermodynamics?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 55 Measurement of temperature is based on the Zeroth law of thermodynamics.
RRB JE ME (CBT II) Mock Test- 4 - Question 56

Joule’s experiment states that for a cycle

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 56

RRB JE ME (CBT II) Mock Test- 4 - Question 57

An insulated box containing 0.5 kg of a gas having cv = 0.95kJ/kgK falls from a balloon 4 km above the earth’s surface. the temperature rise of the gas when hits the ground is

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 57 Change in internal energy = change in potential energy

McvdT = mgh

dT = 9.81 x 4000/0.98 x 103 = 40 K

RRB JE ME (CBT II) Mock Test- 4 - Question 58

A Carnot engine operates between 27℃ and 327℃. If the engine produces 300 kJ of work, what is the entropy change during heat addition?

RRB JE ME (CBT II) Mock Test- 4 - Question 59

Increase in entropy of a system represents

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 59 Entropy is the measure of degree of disorderness. Increase in entropy of a system represents degradation of energy.
RRB JE ME (CBT II) Mock Test- 4 - Question 60

Will capillary rise occur and if it occurs what will be capillary rise if glass capillary tube is immersed in water and experiment is carried out by astronauts in space.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 60

Capillary rise is given by

h=4*cosθ*σ/ρ*g*d

hence rise is inversely proportional to g

In space g is 0 m/s2

Hence, capillarity rise will occur finitely and will be the whole length of the tube.

RRB JE ME (CBT II) Mock Test- 4 - Question 61

If a pure substance is below the triple point temperature, the solid on being heated will only

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 61

Upon heating, the phase changes from S to V, so the solid will vaporize or sublime.

RRB JE ME (CBT II) Mock Test- 4 - Question 62

When a system reaches the state of equilibrium, the following property assumes its maximum value

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 62 When a system reaches equilibrium, the driving force that executed the process becomes zero, and entropy attains its maximum value. Moreover, as the process progresses towards equilibrium the available energy or availability decreases continuously.
RRB JE ME (CBT II) Mock Test- 4 - Question 63

A body of mass 2 kg and cp=1.00 kJ/kgK is available at 600 K. If the atmosphere is 300 K and ln 2 = 0.693, the maximum work obtainable from the body till it comes to equilibrium with the atmosphere is

RRB JE ME (CBT II) Mock Test- 4 - Question 64

The COP of an ideal refrigerator is N. If the machine is operated as a heat pump between the same temperature limits, its COP will be

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 64

RRB JE ME (CBT II) Mock Test- 4 - Question 65

Which cycle consists of two reversible isotherms and two reversible isobars?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 65 Two reversible isotherms and two isobars are represented by the Ericsson cycle.
RRB JE ME (CBT II) Mock Test- 4 - Question 66

Air injection in IC engine refers to the njection of

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 66 Air injection in IC engines refers to the injection of liquid fuel and air.
RRB JE ME (CBT II) Mock Test- 4 - Question 67

Which of the following factors would increase the probability of knocking in the CI engines?

1. Long ignition delay of fuel.

2. Low self ignition temperature of fuel.

3. Low volatility of fuel.

Select the correct answer using the codes given below:

Codes:

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 67 In CI engine long ignition delay leads to knocking.
RRB JE ME (CBT II) Mock Test- 4 - Question 68

Which of the following sets of the materials is most commonly used in catalytic converters for CI engines?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 68

Platinum : for hydro-carbon (HC)

Palladium : for Carbon-mono-oxide

Rhodium : for oxide of nitrogen (NOx)

RRB JE ME (CBT II) Mock Test- 4 - Question 69

In a variable speed SI engine, the maximum torque occurs at the maximum

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 69

Brake Power = 2?NT/60

N = speed in rpm

T = torque

RRB JE ME (CBT II) Mock Test- 4 - Question 70

The capillary rise at 20℃ in a clean glass tube of 1 mm diameter containing water is approximately

RRB JE ME (CBT II) Mock Test- 4 - Question 71

What are the forces that influence the problem of fluid statics ?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 71 Gravity and pressure forces influence the problem of fluid statics.
RRB JE ME (CBT II) Mock Test- 4 - Question 72

The vertical component of force on a curved surface submerged in a static liquid is equal to the

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 72 Vertical component of a curved surface is equal to the weight of the liquid contained in that portion extending vertically above the curved surface up to the free surface of the liquid.
RRB JE ME (CBT II) Mock Test- 4 - Question 73

Which one of the following is the condition for stable equilibrium of a floating body ?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 73 The metacenter is above the centre of gravity.
RRB JE ME (CBT II) Mock Test- 4 - Question 74

The flow in a pipe whose valve is being opened or closed gradually is an example of

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 74 As the fluid velocity and flow will change with time the flow will be nonsteady.
RRB JE ME (CBT II) Mock Test- 4 - Question 75

Which one of the following is measured by a rotameter ?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 75 Rotameter and elbow meter measure discharge through pips
RRB JE ME (CBT II) Mock Test- 4 - Question 76

In flow through a pipe, the transition from laminar to turbulent flow does not depend on

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 76 Transitional flow depends upon Reynolds number

∴ Re depends on density of fluid, velocity of fluid, viscosity of fluid, and diameter of the pipe

RRB JE ME (CBT II) Mock Test- 4 - Question 77

For laminar flow through a pipe, the discharge varies

RRB JE ME (CBT II) Mock Test- 4 - Question 78

The boundary layer thickness at a given distance from the leading edge of a flat plat is

RRB JE ME (CBT II) Mock Test- 4 - Question 79

Euler number is defined as the ratio of inertia force to

RRB JE ME (CBT II) Mock Test- 4 - Question 80

Match List-I (Dimensionless number) with List-II (Definition as the ratio of) and select the correct answer using the codes given below the lists:

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 80

Inertia -viscous force ratio → Reynold number

Inertia-Gravity force ratio → Froude number

Inertia- Surface tension ratio → Weber number

Inertia-elastic force ratio → Mach number

RRB JE ME (CBT II) Mock Test- 4 - Question 81

A refrigerating machine having a coefficient of performance equal to 2 is used to remove heat at the rate of 1200 kJ/min. What is the power required for this machine?

RRB JE ME (CBT II) Mock Test- 4 - Question 82

Waste heat can be effectively used in which one of the following refrigeration systems?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 82 In vapour absorption cycle generator is used. The generator is heated with the waste heat coming out from the boiler, gas turbine or solar energy etc.
RRB JE ME (CBT II) Mock Test- 4 - Question 83

Where is an air refrigeration cycle generally employed?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 83 Air refrigeration cycle is used widely for gas liquefaction.
RRB JE ME (CBT II) Mock Test- 4 - Question 84

The sensing bulb of the thermostatic expansion valve is located at the

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 84 The thermostatic expansion valve consists of a needle valve and a seat, a metallic diaphragm, spring, and an adjusting screw. In addition to this, it has a feeler or thermal bulb mounted on the suction line near the evaporator coil outlet. The feeler bulb is partly filled with the same liquid refrigerant as used in the refrigeration system.
RRB JE ME (CBT II) Mock Test- 4 - Question 85

The pressure at any given point of a non-moving fluid is called the ____________

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 85 Hydrostatic pressure varies with the increase in depth. Hydrostatic pressure is measured from the surface of the fluid because of the increasing weight of the fluid. The fluid exerts a downward force from the surface of water thus making it a non-moving fluid.
RRB JE ME (CBT II) Mock Test- 4 - Question 86

The room's sensible heat loss is 30,000 kJ/h and the latent heat loss is 20,000 KJ/h. then the sensible heat factor is

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 86

SHF = RSHL / RSHL + LHL

= 3000/30000 + 20000

= 3/5

= 0.6

RRB JE ME (CBT II) Mock Test- 4 - Question 87

A plane wall is 25 cm thick with an area of 1 m² and has a thermal conductivity of 0.5 W/mK. If a temperature difference of 60°C is imposed across it, what is the heat flow?

RRB JE ME (CBT II) Mock Test- 4 - Question 88

In which one of the following materials is the heat energy propagation minimum due to conduction heat transfer?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 88 Due to the What is the NTU ? nimum thermal conductivity of air, heat conduction is minimum in air.
RRB JE ME (CBT II) Mock Test- 4 - Question 89

Fins are used to increase the heat transfer from the surface by

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 89 fins are used to increase the heat transfer from the surface by increasing the effective surface area.
RRB JE ME (CBT II) Mock Test- 4 - Question 90

Which one of the following numbers represents the ratio of kinematic viscosity to thermal diffusivity?

RRB JE ME (CBT II) Mock Test- 4 - Question 91

Heat transfer by radiation between two grey bodies of emissivity ε is proportional to (notations have their usual meanings)

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 91

RRB JE ME (CBT II) Mock Test- 4 - Question 92

The shape factor of a hemispherical body placed on a flat surface with respect to itself is

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 92

F11 + F, = 1

F11 = 0

F12 = 1

A1F12 = A2F21

?R2 = F212?R2

F21 = 0.5

RRB JE ME (CBT II) Mock Test- 4 - Question 93

A cross-flow type air heater has an area of 50 m². The overall transfer coefficient is 100 W/m²K,the and heat capacity of the stream, be it hot or cold, is 1000 W/K. What is the NTU ?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 93

NTU = UA/Cmin = 100 x 50/1000 = 5

RRB JE ME (CBT II) Mock Test- 4 - Question 94

Consider the following phenomena:

1. Boiling

2. Free convection in air

3. forced convection

4. conduction in the the air

Their correct sequence in increasing order of heat transfer coefficient is

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 94 hboiling >hforced convection > hfree convection > hconduction
RRB JE ME (CBT II) Mock Test- 4 - Question 95

Once-through boilers operate at

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 95 NTPC-Talcher (Orissa) plant has a sub-critical once-through boiler.
RRB JE ME (CBT II) Mock Test- 4 - Question 96

The air pre-heater of a boiler is located between

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 96

Path of Flue Gas

RRB JE ME (CBT II) Mock Test- 4 - Question 97

In a centrifugal compressor, an increase in speed at a given pressure ratio causes

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 97

RRB JE ME (CBT II) Mock Test- 4 - Question 98

In a shock wave, the flow passes from a

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 98 In a shock wave, the flow passes from a supersonic to a subsonic state.
RRB JE ME (CBT II) Mock Test- 4 - Question 99

The reheat cycle in steam power plant is mainly adopted to

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 99 By reheating the steam between the intermediate stage of two turbines improves the quality of the steam at the exit of the turbine.
RRB JE ME (CBT II) Mock Test- 4 - Question 100

The gas in a cooling chamber of a closed-cycle gas turbine is cooled at

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 100 In closed-cycle gas turbines the cooling process occurs at constant pressure.
RRB JE ME (CBT II) Mock Test- 4 - Question 101

Which method combines established methods such as statistical process control, design of experiments and failure mode and effects analysis (FMEA) in an overall framework.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 101 Six Sigma (6σ) is a set of techniques and tools for process improvement. It was introduced by engineer Bill Smith while working at Motorola in 1980.
RRB JE ME (CBT II) Mock Test- 4 - Question 102

Which is the dimensionless quantity in fluid dynamics?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 102 In fluid dynamics, the Mach number (M or Ma) is a dimensionless quantity representing the ratio of flow velocity past a boundary to the local speed of sound
RRB JE ME (CBT II) Mock Test- 4 - Question 103

What is the tolerance limit for any dimension in the limit system which is also known as the tolerance zone.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 103 The term tolerance refers to the difference between the upper (maximum) limit and lower (minimum) limit of a dimension. In other words, tolerance is the maximum permissible variation in a dimension. The tolerance may be of two types i.e. unilateral or bilateral. This allowed the tolerance of +0.002 and -0.002 from normal size.
RRB JE ME (CBT II) Mock Test- 4 - Question 104

In the manufacturing processes of steel,the ,,feedstocksthe the ich metal is converted into steel in the Bessemer process?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 104 In the Bessemer process three distinctive stages used to convert molten pig iron into steel. The Bessemer process was the first inexpensive industrial process for the mass production of steel from molten pig iron before the development of the open hearth furnace. The key principle is removal of impurities from the iron by oxidation with air being blown through the molten iron.
RRB JE ME (CBT II) Mock Test- 4 - Question 105

Which meter is a velocity type meter which has an impeller which rotates horizontally on a vertical shaft.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 105 A multiple jet or multi-jet meter is a velocity type meter which has an impeller which rotates horizontally on a vertical shaft. The impeller element is in a housing in which multiple inlet ports direct the fluid flow at the impeller causing it to rotate in a specific direction in proportion to the flow velocity.
RRB JE ME (CBT II) Mock Test- 4 - Question 106

When was the battle of Chillianwala fought?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 106 The Battle of Chillianwala was fought in January 1849 during the Second Anglo-Sikh War in the Chillianwala region of Punjab (Mandi Bahauddin), now part of modern-day Pakistan.
RRB JE ME (CBT II) Mock Test- 4 - Question 107

The invention of ________ led to the third generation of computers.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 107 The period of the third generation was from 1965-1971. The computers of the third generation used Integrating Circuits in place of transistors.
RRB JE ME (CBT II) Mock Test- 4 - Question 108

Why is KO2 used in oxygen cylinders used in space and submarines?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 108 It absorbs CO2 and increases O2 concentration according to the following reaction

4KO2 + 2CO2 → 2K2CO3 = 3O2

As in product O2 again is produced so its best to generate oxygen using Carbon Dioxide produced during breathing by using cylinder's gas.

RRB JE ME (CBT II) Mock Test- 4 - Question 109

Tooth enamel which is the hardest substance found in the human body, made up of______?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 109 The protective layer around your teeth, called enamel, is the strongest substance that our body produces. In fact, tooth enamel is stronger than any other substance on earth except for diamonds. It is composed largely of calcium and phosphate mineral crystals, similar to the composition of our bones.
RRB JE ME (CBT II) Mock Test- 4 - Question 110

Coefficient of Performance for an ideal refrigeration cycle?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 110 For an ideal refrigeration cycle

COP = TL/(TH-TL)

making the COP drop below unity when the outside air temperature is too low. Therefore, the system used to heat houses uses fuel.

RRB JE ME (CBT II) Mock Test- 4 - Question 111

A single-pressure absorption refrigerator liquid's evaporation rate depends upon?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 111 A single-pressure absorption refrigerator takes advantage of the fact that a liquid's evaporation rate depends upon the partial pressure of the vapor above the liquid and goes down with lower partial pressure.
RRB JE ME (CBT II) Mock Test- 4 - Question 112

Which is applied to the metering tube, which results in a potential difference proportional to the flow velocity perpendicular to the flux lines

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 112 Magnetic flow meter, also technically an electromagnetic flow meter or more commonly just called a mag meter. A magnetic field is applied to the metering tube, which results in a potential difference proportional to the flow velocity perpendicular to the flux lines. The physical principle at work is electromagnetic induction.
RRB JE ME (CBT II) Mock Test- 4 - Question 113

Which is a systematic method for waste minimization ("Muda") within a manufacturing system without sacrificing productivity

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 113 Lean manufacturing or lean production, often simply "lean", is a systematic method for waste minimization ("Muda") within a manufacturing system without sacrificing productivity, which can cause problems.
RRB JE ME (CBT II) Mock Test- 4 - Question 114

A spherical device with 20 mm outer radius has to be covered with an insulation (k=0.2 W/mK). The atmosphere heat convection coefficient is h= 10 W/ K. Find the thickness of insulation for maximum heat transfer?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 114

critical radius for sphere = 2k/h

=40mm

thickness = 40 - 20 = 20mm

RRB JE ME (CBT II) Mock Test- 4 - Question 115

VDI stands for in vehicles?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 115 Variable Direct Injection is a technology that has been tried in a variety of internal combustion engines (mostly diesel) where the amount of fuel injected directly into the cylinder can be varied depending on the demands for the engine.
RRB JE ME (CBT II) Mock Test- 4 - Question 116

What is the velocity of sound waves in the fluid with K as the bulk modulus and p as the density of the fluid?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 116 The velocity of sound waves in the fluid with K as the bulk modulus and p as the density of the fluid is given by K p
RRB JE ME (CBT II) Mock Test- 4 - Question 117

Which among the following is the Largest Freshwater Lake in India?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 117 Wular Lake, One of the Largest Freshwater Lakes in India. Wular Lake, located in the state of Jammu and Kashmir, is often referred to as the largest freshwater lake in India. Wular is a natural lake that is a major part of the Jhelum River basin.
RRB JE ME (CBT II) Mock Test- 4 - Question 118

Biligiriranga Temple Wildlife Sanctuary is located in ________?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 118 The Biligirirangana Hills, commonly called BR Hills, is a hill range situated in south-eastern Karnataka.
RRB JE ME (CBT II) Mock Test- 4 - Question 119

Which adsorbent was used in the vapor absorption cycle in the twentieth century?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 119 The twentieth century, the vapor absorption cycle using water-ammonia systems was popular and widely used, but after the development of the vapor compression cycle, it lost much of its importance because of its low coefficient of performance.
RRB JE ME (CBT II) Mock Test- 4 - Question 120

Maximum Strain Energy Theory postulates that failure will occur when the strain energy per unit volume.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 120 This theory postulates that failure will occur when the strain energy per unit volume due to the applied stresses in a part equals the strain energy per unit volume at the yield point in uniaxial testing.
RRB JE ME (CBT II) Mock Test- 4 - Question 121

For given triangle find

I EF / I AB

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 121

using parallel axis theorem and moment of area for triangle

RRB JE ME (CBT II) Mock Test- 4 - Question 122

On what voltage two-pole common trip breaker breaks the voltage?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 122 Two-pole common trip breakers are common on 120/240-volt systems where 240 volt loads (including major appliances or further distribution boards) span the two live wires.
RRB JE ME (CBT II) Mock Test- 4 - Question 123

LDV stands for in measure the velocity in transparent or semi-transparent fluid flows, or the linear or vibratory motion of opaque, reflecting, surfaces.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 123 Laser Doppler velocimetry (LDV), also known as laser Doppler anemometry (LDA), is the technique of using the Doppler shift in a laser beam to measure the velocity in transparent or semi-transparent fluid flows, or the linear or vibratory motion of opaque, reflecting, surfaces. The measurement with LDA is absolute, linear with velocity and requires no pre-calibration.
RRB JE ME (CBT II) Mock Test- 4 - Question 124

Which file format allows the digital exchange of information among computer-aided design (CAD) systems.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 124 The Initial Graphics Exchange Specification (IGES) (pronounced eye-jess) is a vendor-neutral file format that allows the digital exchange of information among computer-aided design (CAD) systems.
RRB JE ME (CBT II) Mock Test- 4 - Question 125

What is the voltage requirement for the electric resistance welding in the welding process of metal.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 125 Low voltage is required in the electric resistance welding. The process employs currents of the order of few KA, voltages range from 2 to 12 volts, and times vary from a few ms to few seconds. Force is normally applied before, during, and after the flow of current to avoid arcing between the surfaces and to forge the weld metal during post-heating. The necessary pressure shall vary from 30 to 60 N mm-2 depending upon the material to be welded and other welding conditions. The correct option is 6 to 10 volts, and the current is 60 to 400 amperes.
RRB JE ME (CBT II) Mock Test- 4 - Question 126

Which condition is true?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 126 The ratio of slope of adiabatic to the slope of isothermal › 1
RRB JE ME (CBT II) Mock Test- 4 - Question 127

The actual demand for cycles was 300 in January and 400 in February. The forecast for the month of January was 350 units. The value of smoothing Coefficient is 0.50, the forecast for the month of March is

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 127

Forecast of February = 350 - ½(50) = 325

Forecast of March = 325 + ½(75) = 362.5

Demand

Forecast

Error (D-F)

January

300

350

-50

February

400

325

75

March

362.5

RRB JE ME (CBT II) Mock Test- 4 - Question 128

The 52nd amendment to the Constitution of India is most closely related to-

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 128 Constitution 52nd Amendment Act, 1985 provided provisions related to anti-defection in India. In this amendment, articles 101, 102, 190 and 191 were changed. It laid down the process by which legislators may be disqualified on grounds of defection and inserted schedule 10.
RRB JE ME (CBT II) Mock Test- 4 - Question 129

Which of the following is the moon of Pluto?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 129 Pluto has five known moons: Charon (the largest, with a diameter just over half that of Pluto), Styx, Nix, Kerberos, and Hydra. Pluto and Charon are sometimes considered a binary system because the barycenter of their orbits does not lie within either body.
RRB JE ME (CBT II) Mock Test- 4 - Question 130

Green plants utilize ……… percent of the sun's energy to prepare their food by the process of photosynthesis?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 130 The study of flow of energy between various ecosystems states that the autotrophs in a terrestrial ecosystem capture about 1% of the energy of sunlight that falls on their leaves and convert it into feed.
RRB JE ME (CBT II) Mock Test- 4 - Question 131

Tooth Space – Tooth Thickness = ?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 131 Tooth Space – Tooth thickness = Backlash

In backlash, sometimes called lash or play, is a clearance or lost motion in a mechanism caused by gaps between the parts.

RRB JE ME (CBT II) Mock Test- 4 - Question 132

What three-terminal power semiconductor device primarily used as an electronic switch which, as it was developed, came to combine high efficiency and fast switching.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 132 An insulated-gate bipolar transistor (IGBT) is a three-terminal power semiconductor device primarily used as an electronic switch which, as it was developed, came to combine high efficiency and fast switching. It consists of four alternating layers (P-N-P-N) that are controlled by a metal-oxide-semiconductor (MOS) gate structure without regenerative action.
RRB JE ME (CBT II) Mock Test- 4 - Question 133

Which casting is a type of evaporative-pattern casting process that is similar to investment casting except foam is used for the pattern instead of wax.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 133 Lost-foam casting is a type of evaporative-pattern casting process that is similar to investment casting except foam is used for the pattern instead of wax. This process takes advantage of the low boiling point of foam to simplify the investment casting process by removing the need to melt the wax out of the mold.
RRB JE ME (CBT II) Mock Test- 4 - Question 134

The three Time estimates of an activity in a PERT network are

Most likely time = 15 days

Optimistic time = 9 days

Pessimistic time = 27 days

Probability to complete this activity in 16 days?

RRB JE ME (CBT II) Mock Test- 4 - Question 135

Which gas was used in air conditioners?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 135 The most common refrigerant gas used in air-conditioning systems was R-22 (Freon). We started using it in 2010 and the phasing out took place in 2015.
RRB JE ME (CBT II) Mock Test- 4 - Question 136

What is the source of heat in an absorption refrigerator?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 136 An absorption refrigerator is a refrigerator that uses a heat source (e.g., solar energy, a fossil-fueled flame, waste heat from factories, or district heating systems) to provide the energy needed to drive the cooling process.
RRB JE ME (CBT II) Mock Test- 4 - Question 137

Why Flexure formula not apply directly to composite beams, which is the correct assumption?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 137 Flexure formulas do not apply directly to composite beams because it was based on the assumption that the beam was homogeneous. It is therefore necessary to transform the composite material into an equivalent homogeneous section.
RRB JE ME (CBT II) Mock Test- 4 - Question 138

How can we describe the elasticity for the material which is subject to any stress?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 138 Elasticity is the ability of a material to return to its previous shape after stress is released. In many materials, the relation between applied stress is directly proportional to the resulting strain.
RRB JE ME (CBT II) Mock Test- 4 - Question 139

For a pair of involute RACK and Pinion of 14.5 degree pressure angle ,

Find the minimum number of teeth required to avoid interference.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 139

minimum no of teeths in case of rack and pinion

putting Ar =1

and angle as 14.5

we get 31.9

that is minimum 32 teeth

RRB JE ME (CBT II) Mock Test- 4 - Question 140

In 1824 the sepoys refused to go to which place to fight for the East India Company by sea route?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 140 In 1824 the Sepoys were asked to go to Burma by the sea route to fight for the East India Company. The Sepoys refused to do so as they believed that if they crossed the sea they would lose their religion and caste. The Sepoys were severely punished for not obeying the British. In 1856 the Company passed a new law which stated that every new person who took up employment in the company army had to agree to serve overseas if required.
RRB JE ME (CBT II) Mock Test- 4 - Question 141

Which methods are used in managing inventory and financial matters involving the amount of money a company has to have tied up within the inventory of produced goods, raw materials, parts, components, or feed stocks.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 141 "FIFO" stands for first-in, first-out, meaning that the oldest inventory items are recorded as sold first but do not necessarily mean that the exact oldest physical object has been tracked and sold. In other words, the cost associated with the inventory that was purchased first is the cost expensed first. "LIFO" stands for last-in, first-out.
RRB JE ME (CBT II) Mock Test- 4 - Question 142

What is the relation for velocity ratio in the third system of Pulleys which is used for commercial purposes? Where n is the number of pulleys.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 142 Pulleys which are used for reducing the weight for any weight lifting system use velocity ratio in which n is the number of pulleys for three pulleys system it is give as 2n - 1
RRB JE ME (CBT II) Mock Test- 4 - Question 143

Where is the pressure angle maximum on the pitch curve?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 143 The point on the pitch curve where the pressure angle is maximum is the pitch point.
RRB JE ME (CBT II) Mock Test- 4 - Question 144

For an epicyclic gear train the input torque is 100 Nm and RPM of input gear is 1000 clockwise while that of output gear is 100 RPM anticlockwise.

What is the value of holding torque for a gear train?

RRB JE ME (CBT II) Mock Test- 4 - Question 145

Which of the following instruments is used to study the dispersion of light?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 145 When the light emerges from the other face of the prism we observe the seven constituents of light. This phenomenon of the splitting of light into its constituent colours is called dispersion. Spectrometers and polarimeters are instruments used to study dispersion.
RRB JE ME (CBT II) Mock Test- 4 - Question 146

Indian born Shiva Ayyadurai is associated with the invention of -

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 146 Shiva Ayyadurai (born Vellayappa Ayyadurai Shiva, December 2, 1963) is an Indian-born American scientist and entrepreneur. He is notable for his controversial claim to be the "inventor of email", based on the electronic mail software called "EMAIL" he wrote as a New Jersey high school student in the late 1970s.
RRB JE ME (CBT II) Mock Test- 4 - Question 147

Which of the following chemical/s is/are used in the breath test of a person who consumes alcohol during interrogation?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 147 Potassium dichromate and Sulphuric acid are used in the breath test of an alcoholic. This test is widely used by the traffic police to analyze the degree of drunkenness during driving.
RRB JE ME (CBT II) Mock Test- 4 - Question 148

Quasi – static process ?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 148 Quasi – static process is a very slow process, so it is carried out in a very slow manner with small gradients.
RRB JE ME (CBT II) Mock Test- 4 - Question 149

What is the ratio for the mechanical efficiency in any automobile engine while working condition?

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 149 Mechanical efficiency, is the parameter that gives the effectiveness of an engine in transforming it's input energy to output energy. For an internal combustion engine, it is the ratio between the brake work and indicated work.
RRB JE ME (CBT II) Mock Test- 4 - Question 150

A vacuum gage connected to a chamber reads 4.8 psi at a location where the atmospheric pressure is 12.5 psi. Determine the absolute pressure in the chamber.

Detailed Solution for RRB JE ME (CBT II) Mock Test- 4 - Question 150 absolute Pressure = Patm - Pvac= 12.5 -4.8 =7.7 psi
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