Mock Test: SSC JE (ME)- 3 - Mechanical Engineering MCQ

# Mock Test: SSC JE (ME)- 3 - Mechanical Engineering MCQ

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## 100 Questions MCQ Test - Mock Test: SSC JE (ME)- 3

Mock Test: SSC JE (ME)- 3 for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Mock Test: SSC JE (ME)- 3 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Mock Test: SSC JE (ME)- 3 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)- 3 below.
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Mock Test: SSC JE (ME)- 3 - Question 1

### An Ideal gas at 27ºC is heated at constant pressure till the volume becomes three times. The temperature of the gas will then be

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Mock Test: SSC JE (ME)- 3 - Question 2

### If the time taken by a system to execute a process through a finite gradient is infinitely large,the process

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Mock Test: SSC JE (ME)- 3 - Question 3

### Gas contained in a closed system consisting of piston cylinder arrangement is expand. Workdone by the gas during expansion is 50 kJ. Decreases in internal energy of the gas duringexpansion is 30 kJ. Heat transfer during the process is equal to

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Mock Test: SSC JE (ME)- 3 - Question 4

Direction: Each of the next consists of two statements, one labeled as the 'Assertion (A)' and
the other as 'Reason (R)'. You are to examine these two statements carefully and select the answers to these items using the codes given below:
Codes:
(a) Both A and R are individually true and R is the correct explanation of A.
(b) Both A and R are individually true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true

Assertion (A): The changes in heat and work cannot be expressed as difference between the
end states.
Reason (R) : Heat and work both are exact differentials.

Detailed Solution for Mock Test: SSC JE (ME)- 3 - Question 4

Mock Test: SSC JE (ME)- 3 - Question 5

For a given value of TH (Source temperature) for a reversed Carnot cycle, the variation of TL(Sink temperature) for different values of COP is represented by which one of the following graphs ?

Mock Test: SSC JE (ME)- 3 - Question 6

Efficiency of a Carnot engine is 75%. If the cycle direction is reversed, COP of the reversed Carnot cycle is

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Mock Test: SSC JE (ME)- 3 - Question 7

Gibb's free energy 'G' is defined as

Mock Test: SSC JE (ME)- 3 - Question 8

The state of a substance whose evaporation from its liquid state is complete, is known as

Mock Test: SSC JE (ME)- 3 - Question 9

The ratio of specific heat at constant pressure (cp) and specific heat at constant volume (c,) is

Mock Test: SSC JE (ME)- 3 - Question 10

A process, in which the temperature of the working substance remains constant during itsexpansion or compression, is called

Mock Test: SSC JE (ME)- 3 - Question 11

Carnot cycle consists of

Mock Test: SSC JE (ME)- 3 - Question 12

The absolute zero pressure will be

Mock Test: SSC JE (ME)- 3 - Question 13

A condenser of a refrigeration system rejects heat at rate of 120 kW, while its compressorconsumes a power of 30 kW. The coefficient of performance of the system would be

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Mock Test: SSC JE (ME)- 3 - Question 14

Consider the following statements: Moisture should be removed from refrigerants
to avoid
1. Compressor seal failure
2. Freezing at the expansion valve.
3. Restriction to refrigerant flow.
4. Corrosion of steel parts.
Which of these statements are correct?

Mock Test: SSC JE (ME)- 3 - Question 15

Match List-I (Process) with List-II (Type)for Bell Coleman or Joule or Reverse Brayton cycle
for gas cycle refrigeration and select the correct answer using the codes given below the lists:

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Mock Test: SSC JE (ME)- 3 - Question 16

The power per tonne of refrigeration is

Mock Test: SSC JE (ME)- 3 - Question 17

Which of the following represents a heat pump ?

Mock Test: SSC JE (ME)- 3 - Question 18

In a petrol engine car, which one of the following performance characteristic is affected by thefront-end volatility gasoline used ?

Mock Test: SSC JE (ME)- 3 - Question 19

Match List-I (Gas cycles) with List-II (Thermodynamic coordinates) and select correct
answer using the codes given below the lists:

Mock Test: SSC JE (ME)- 3 - Question 20

Direction: Each of the next consists of two statements, one labeled as the 'Assertion (A)' and
the other as 'Reason (R)'. You are to examine these two statements carefully and select the answers to these items using the codes given below:
Codes:
(a) Both A and R are individually true and R is the correct explanation of A.
(b) Both A and R are individually true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true

Statement (I) : Specific output of a SI engine is higher than the CI engine
Statement (II): Its higher engine mixture result in ability to burn richer mixture result in increased
energy conversion rate.

Mock Test: SSC JE (ME)- 3 - Question 21

An ideal spark ignition engine has a compression ratio of 9. What is its Air standard efficiency ifratio of specific heats is 1.5 ?

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Mock Test: SSC JE (ME)- 3 - Question 22

For minimizing knocking tendency in SI engine, where should the spark plug be located ?

Mock Test: SSC JE (ME)- 3 - Question 23

Which of the following fuel has little tendency towards detonation ?

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Mock Test: SSC JE (ME)- 3 - Question 24

Stoichiometric ratio is

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Stoichiometric ratio is Chemically correct air-fuel ratio by volume.

Mock Test: SSC JE (ME)- 3 - Question 25

Which of the following form part (s) of boiler mountings ?
1. Economiser
2. Feed check valve
3. Steam trap
4. Superheater

Select the correct answer using the codes given below:

Mock Test: SSC JE (ME)- 3 - Question 26

Which one of the following statement is not correct ?In a fluidized-bead boiler

Mock Test: SSC JE (ME)- 3 - Question 27

In a boiler, the air preheater in invariably located between:

Detailed Solution for Mock Test: SSC JE (ME)- 3 - Question 27

Air preheater is invariably located between forced draft fan and furnace to preheat the combustion air.

Mock Test: SSC JE (ME)- 3 - Question 28

Out of the following impurities generally found in water, which one requires special considerationin case of very high pressure boilers?

Mock Test: SSC JE (ME)- 3 - Question 29

The function of economizer in a boiler is to

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Mock Test: SSC JE (ME)- 3 - Question 30

When a hydrocarbon fuel burns in deficit air, Orsat analyzer will show the presence offollowing gases in the engine exhaust

Mock Test: SSC JE (ME)- 3 - Question 31

Once-through boilers will not have

Mock Test: SSC JE (ME)- 3 - Question 32

The forced circulation of water does not take place in

Mock Test: SSC JE (ME)- 3 - Question 33

Which of the following are boiler accessories ?

Mock Test: SSC JE (ME)- 3 - Question 34

The pressure of feed water has to be raised  fore its entry into the boiler. The pressure israised by a device known as

Mock Test: SSC JE (ME)- 3 - Question 35

In the phenomenon of cavitation, the characteristic fluid property involved is

Mock Test: SSC JE (ME)- 3 - Question 36

What is the unit of dynamic viscosity of a fluid termed "poise" equivalent to ?

Mock Test: SSC JE (ME)- 3 - Question 37

The vapour pressure is the characteristic fluid property involved in the phenomenon of

Mock Test: SSC JE (ME)- 3 - Question 38

In a pipe-flow, pressure is to be measured at a particular cross- section using the most appropriate instrument. Match List-I (Expected pressure range) with List-II (Appropriate measuring device) and select the correct answer using the codes given below the lists:

Mock Test: SSC JE (ME)- 3 - Question 39

The centre of pressure for an inclined surface area

Mock Test: SSC JE (ME)- 3 - Question 40

The frictional head loss in a turbulent flow through a pipe varies

Mock Test: SSC JE (ME)- 3 - Question 41

The friction factor for fully developed turbulent flow through a rough circular pipe depends on

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Mock Test: SSC JE (ME)- 3 - Question 42

The variation in the volume of a liquid with the variation of pressure is called its

Mock Test: SSC JE (ME)- 3 - Question 43

The atmospheric pressure at sea level is

Mock Test: SSC JE (ME)- 3 - Question 44

The centre of gravity of the volume of the liquid displaced is called

Mock Test: SSC JE (ME)- 3 - Question 45

The discharge over a rectangular notch is

where b = width of notch

h = Height of liquid above the sill of notch

Mock Test: SSC JE (ME)- 3 - Question 46

The unit speed of the turbine runner is

Mock Test: SSC JE (ME)- 3 - Question 47

The cavitation in a hydraulic machine

Mock Test: SSC JE (ME)- 3 - Question 48

Fig. shows the three coplanar force P.Q and R acting at a point O. If these forces are in
equilibrium , then

Mock Test: SSC JE (ME)- 3 - Question 49

Moment of inertia is the

Mock Test: SSC JE (ME)- 3 - Question 50

The friction experienced by a body, when at rest, is known as

Mock Test: SSC JE (ME)- 3 - Question 51

Which of the following are vector quantities ?

Mock Test: SSC JE (ME)- 3 - Question 52

The volumetric strain in case of a thin cylindrical shell of diameter 'd', thickness 't', subjected to
internal pressure 'P' is

Mock Test: SSC JE (ME)- 3 - Question 53

The Poisson ratio of a material which has Young's modulus of 120 GPa and shear modulus of 50GPa, is

Detailed Solution for Mock Test: SSC JE (ME)- 3 - Question 53