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Mock Test: SSC JE (ME)- 4 - Mechanical Engineering MCQ


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30 Questions MCQ Test Mechanical Engineering SSC JE (Technical) - Mock Test: SSC JE (ME)- 4

Mock Test: SSC JE (ME)- 4 for Mechanical Engineering 2024 is part of Mechanical Engineering SSC JE (Technical) preparation. The Mock Test: SSC JE (ME)- 4 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Mock Test: SSC JE (ME)- 4 MCQs are made for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Mock Test: SSC JE (ME)- 4 below.
Solutions of Mock Test: SSC JE (ME)- 4 questions in English are available as part of our Mechanical Engineering SSC JE (Technical) for Mechanical Engineering & Mock Test: SSC JE (ME)- 4 solutions in Hindi for Mechanical Engineering SSC JE (Technical) course. Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free. Attempt Mock Test: SSC JE (ME)- 4 | 100 questions in 60 minutes | Mock test for Mechanical Engineering preparation | Free important questions MCQ to study Mechanical Engineering SSC JE (Technical) for Mechanical Engineering Exam | Download free PDF with solutions
Mock Test: SSC JE (ME)- 4 - Question 1
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An insulated rigid vessel contains a mixture of fuel and air. The mixture is ignited by a minutespark. The contents of the vessel experience.

Mock Test: SSC JE (ME)- 4 - Question 2
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The specific heats of an ideal gas depend on its

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Mock Test: SSC JE (ME)- 4 - Question 3
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When an ideal gas with constant specific heats is throttled adiabatically, with negligible changes in
kinetic and potential energies.

Mock Test: SSC JE (ME)- 4 - Question 4
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Which of the following relationships is valid only for reversible processes undergone by a closedsystem of simple compressible substance (neglect changes in kinetic and potential energy) ?
Detailed Solution for Mock Test: SSC JE (ME)- 4 - Question 4

Q = dU + PdV
Reversible closed system

TdS = du + Pdv

Mock Test: SSC JE (ME)- 4 - Question 5
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The relationship ​ 0 holds good for
Mock Test: SSC JE (ME)- 4 - Question 6
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During the phase change of a pure substance
Mock Test: SSC JE (ME)- 4 - Question 7
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At the triple point of a pure substance, the number of degrees of freedom is
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Mock Test: SSC JE (ME)- 4 - Question 8
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The standard value of atmospheric pressure taken at sea level is
Mock Test: SSC JE (ME)- 4 - Question 9
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For a perfect gas, according to Boyle's law

where p = Absolute pressure,
v = Volume, and
T = Absolute temperature
Mock Test: SSC JE (ME)- 4 - Question 10
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When a gas is heated, change takes place in
Mock Test: SSC JE (ME)- 4 - Question 11
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The general law for the expansion or compression of gases, is
Mock Test: SSC JE (ME)- 4 - Question 12
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The property of working substance which increases or decreases as the heat is supplied orremoved in a reversible manner, is known as
Mock Test: SSC JE (ME)- 4 - Question 13
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The use of Refrigerant R–22 for temperature below – 30º is not recommended due to its
Detailed Solution for Mock Test: SSC JE (ME)- 4 - Question 13

R−22  has freezing temperature of -160°C. It requires 5.85 cubic metres per ton per hour at evaporator temperature of 15°C. It gives a coefficient of performance of around 4.66 and consumes around 1.01 horse power per ton.

Mock Test: SSC JE (ME)- 4 - Question 14
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Global warming is caused by
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Mock Test: SSC JE (ME)- 4 - Question 15
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In the window air conditioner, the expansion device used is
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Mock Test: SSC JE (ME)- 4 - Question 16
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Bell-Coleman cycle is a
Mock Test: SSC JE (ME)- 4 - Question 17
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In a reversed Brayton cycle, the heat is absorbed by the air during
Mock Test: SSC JE (ME)- 4 - Question 18
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The power output from a spark ignition engine is varied by
Mock Test: SSC JE (ME)- 4 - Question 19
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An air standard diesel cycle consists of
Mock Test: SSC JE (ME)- 4 - Question 20
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BHP of a diesel engine can be increased by
Mock Test: SSC JE (ME)- 4 - Question 21
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Alcohols are unsuitable at diesel engine fuels because
Mock Test: SSC JE (ME)- 4 - Question 22
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Knocking tendency in a SI engine reduces with increasing
Mock Test: SSC JE (ME)- 4 - Question 23
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​A diesel engine has
Detailed Solution for Mock Test: SSC JE (ME)- 4 - Question 23

Correct Answer :- c

Explanation : A valve is a device that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways.

According to this, In diesel Engine three Valves are one for Intake Air, 2nd for Exhaust gas and 3rd is for Fuel (Injector).

Mock Test: SSC JE (ME)- 4 - Question 24
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The colour of exhaust from diesel engine is generally
Mock Test: SSC JE (ME)- 4 - Question 25
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A economizer in a steam generator performs the function of
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Mock Test: SSC JE (ME)- 4 - Question 26
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For a given set of operating pressure limits of a Rankine cycle the highest efficiency occurs for
Mock Test: SSC JE (ME)- 4 - Question 27
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In a Rankine cycle heat is added
Mock Test: SSC JE (ME)- 4 - Question 28
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Boiler rating is usually defined in terms of
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Mock Test: SSC JE (ME)- 4 - Question 29
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In steam and other vapour cycle, the process of removing non-condensable is called
Detailed Solution for Mock Test: SSC JE (ME)- 4 - Question 29

Correct Answer :- B

Explanation : In the steam and other vapour cycle the process of removing non-condensable gas is known as scavenging process.

Mock Test: SSC JE (ME)- 4 - Question 30
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A gas turbine cycle with heat exchange and reheating improves
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