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# Test: Mechanical Engineering- 8

## 100 Questions MCQ Test Mock Test Series for SSC JE Mechanical Engineering | Test: Mechanical Engineering- 8

Description
This mock test of Test: Mechanical Engineering- 8 for Mechanical Engineering helps you for every Mechanical Engineering entrance exam. This contains 100 Multiple Choice Questions for Mechanical Engineering Test: Mechanical Engineering- 8 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Mechanical Engineering- 8 quiz give you a good mix of easy questions and tough questions. Mechanical Engineering students definitely take this Test: Mechanical Engineering- 8 exercise for a better result in the exam. You can find other Test: Mechanical Engineering- 8 extra questions, long questions & short questions for Mechanical Engineering on EduRev as well by searching above.
QUESTION: 1

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QUESTION: 2

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QUESTION: 3

### For a simple closed system of constant composition, the difference between the net heat and work interactions is identifiable as the change in

Solution:
QUESTION: 4

Assertion (A) : Thermodynamic work is path–
dependent except for an adiabatic process.

Reason (R) : It is always possible to take a
system from a given initial state to any final state

Solution:
QUESTION: 5

Which one of the following is correct ?

The cyclic integral of (dQ –dW) for a process is

Solution:
QUESTION: 6

The variables which control the physical properties of a perfect gas are

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QUESTION: 7

In an isothermal process

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QUESTION: 8

In a free expansion process

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QUESTION: 9

The isothermal and adiabatic process are regarded as

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QUESTION: 10

The efficiency of Joule cycle is

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QUESTION: 11

In a vapour compression refrigeration system, throttle valve is used in place of an expander because

Solution:
QUESTION: 12

Vapour absorption refrigeration system works using the

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QUESTION: 13

In a 3 ton capacity water cooler, water enters at 30ºC and leaves at 15ºC steadily. What is the water flow rate per hour ?

Solution:
QUESTION: 14

The correct sequence of the given components of a vapour compression refrigerator is

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QUESTION: 15

Where is an air refrigeration cycle generally employed ?

Solution:
QUESTION: 16

The subcooling in a refrigeration cycle

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QUESTION: 17

A vapour absorption refrigeration system

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QUESTION: 18

Which gas power cycle consist of four processes during which work alone is transferred during which work alone is transferred during two processes and heat alone is transferred during the other two processes ?

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QUESTION: 19

Divided chamber diesel engines use lower injection pressure compared to open chamberengines because

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QUESTION: 20

The tendency of knocking in CI engine reduced by

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QUESTION: 21

The discharge of hydrocarbons from petrol automobile exhaust is minimum when the vehicle is

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QUESTION: 22

Which one of the following fuels can be obtained by fermentation of vegetable matter ?

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QUESTION: 23

Which one of the following automobile exhaust gas pollutants is a major cause of photochemical smog ?

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QUESTION: 24

When a hydrocarbon fuel burns is excess air orsat analysis of products of combustion will show

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QUESTION: 25

Of all power plants, hydel is more disadvantageous when one compares the

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QUESTION: 26

In thermal power plants, the deaerator is used mainly to

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QUESTION: 27

The degree of reaction of a turbine is defined as the ratio of

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QUESTION: 28

The expression for the maximum efficiency of a Parson's turbine is (a is the angle made by
absolute velocity at inlet)

Solution:
QUESTION: 29

The degree of reaction of an impulse turbine

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QUESTION: 30

With natural uranium, which of the following is used as moderator ?

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QUESTION: 31

A safety valve mainly used with locomotive and marine boilers is

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QUESTION: 32

A device used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit, is called

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QUESTION: 33

In a boiler, the heat is lost

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QUESTION: 34

The fittings mounted on the boiler for its proper and safe functioning is a

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QUESTION: 35

Which one of the following sequences indicates the correct order for flue gas flow in the steam power plant layout ?

Solution:
QUESTION: 36

Statement (I) : A small insect can sit on the free surface of a liquid though insect's density is higher than that of the liquid.
Statement (II) : Liquids have viscosity

Solution:
QUESTION: 37

In the boundary layer, the flow is

Solution:
QUESTION: 38

For an irrotation flow, the velocity potential lines and the streamlines are always

Solution:
QUESTION: 39

The instrument preferred in the measurement of highly fluctuating velocities in air flows is

Solution:
QUESTION: 40

A venturi meter is a device based on the bernoulli principle and is used for measuring

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QUESTION: 41

The loss of head due to sudden enlargement is attributed to

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QUESTION: 42

For laminar flow through a pipe, the discharge varies

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QUESTION: 43

Why are surge tanks used in pipe line ?

Solution:
QUESTION: 44

The correct sequence of the given hydraulic turbines in decreasing order of their specific speeds is

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QUESTION: 45

With an increase in size of tube, the rise or depression of liquid in the dube due to surface tension will

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QUESTION: 46

A differential can be used to measure

Solution:
QUESTION: 47

In one dimensional flow, the flow

Solution:
QUESTION: 48

The forces which do not meet at one point and their lines of action do not lie on the same plane are known as

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QUESTION: 49

The point, through which the whole weight of the body acts, irrespective of its position, is known as

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QUESTION: 50

The moment of inertia of a square of side (a) about an axis through its centre of gravity is

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QUESTION: 51

Which of the following is a scalar quantity ?

Solution:
QUESTION: 52

A rod of length l tapers uniformly from a diameter D at one end to a diameter d at the other. The Young's modulus of the material is E. The extension caused by an axial load P is

Solution:
QUESTION: 53

What are the normal and shear stresses on the 45º planes shown ? Solution:
QUESTION: 54

What is the safe working pressure for a spherical pressure vesel 1.5 m internal diameter and 1.5 cm wall thickness, if the maximum allowable tensile stress is 45 MPa ?

Solution:
QUESTION: 55

Which one of the following portions of the loaded beam shown in the given figure is subjected to pure bending ? Solution:
QUESTION: 56

Match List-I (End conditions of columns) with List-II (Lowest critical load) and select the
correct answer using the codes given below the lists:  Solution:
QUESTION: 57

Strain energy stored in a body of volume V subjected to uniform stress s is

Solution:
QUESTION: 58

Every direct stress is always accompanied by a strain in its own direction and an opposite kind of stain in every direction, at right angles to it. Such a strain is known as

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QUESTION: 59

When a rectangular bar of length l, breadth b and thickness t is subjected to an axial pull of P,
then linear strain (e) is given by

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QUESTION: 60

A concentrated load is one which

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QUESTION: 61

When shear force at a point is zero, then bending moment is .......... at that point.

Solution:
QUESTION: 62

The Young's modulus of a material is 125 GPa and Poissons ratio is 0.25.The modulus rigidityof the material is

Solution:
QUESTION: 63

The shear force at the centre of a simply supported beam with a gradually varying load from zero at both ends to w per metre at the centre , is

Solution:
QUESTION: 64

When a slider moves with a velocity 'V' on a link rotating at an angular speed ofw the Coriolis
component of acceleration is given by

Solution:
QUESTION: 65

The choice of displacement diagram during rise or return of a follower of a cam-follower mechanism is based on dynamic considerations. For high speed cam follower is

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QUESTION: 66

In a slider-crank mechanism, the velocity of piston becomes maximum when

Solution:
QUESTION: 67

A reverted gear train is one in which the output shaft and input shaft

Solution:
QUESTION: 68

Which of the following is a turning pair ?

Solution:
QUESTION: 69

A combination of kinematic pairs, joined in such a way that the relative motion between the links is completely constrained, is called a

Solution:
QUESTION: 70

The method of obtaining different mechanisms by fixing in turn different links in a kinematic chain, is known as

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QUESTION: 71

The mechanism in which two are turning pairs and two are sliding pairs, is called a

Solution:
QUESTION: 72

Which of the following is an inversion of a single slider crank chain ?

Solution:
QUESTION: 73

When two links are connected by a pin joint, there instantaneous centre lies

Solution:
QUESTION: 74

If the size of a standard specimen for fatigue testing machine is increased the endurance limit for the material will

Solution:
QUESTION: 75

Disruptive strength is the maximum strength of a metal, when

Solution:
QUESTION: 76

The bolts in a rigid flanged coupling connecting two shafts transition power are subjected to

Solution:
QUESTION: 77

The railway carriage couplings have

Solution:
QUESTION: 78

The acme threads are usually found on

Solution:
QUESTION: 79

Which of the following has threads at both ends ?

Solution:
QUESTION: 80

The washer is generally specified by its

Solution:
QUESTION: 81

Magnetic forming is an example of

Solution:
QUESTION: 82

Match List-I (Type of Forging) with List-II (Operation) and select the correct answer using
the codes given below the lists:  Solution:
QUESTION: 83

What does hydrostatic pressure in extrusion process improve ?

Solution:
QUESTION: 84

Which one of the following metal forming processes is not a high energy rate forming processes ?

Solution:
QUESTION: 85

The correct sequence of the given processes in manufacturing by powder metallurgy is

Solution:
QUESTION: 86

Arc blow is more common in

Solution:
QUESTION: 87

In which of the following welding process flux is used in the form of granules ?

Solution:
QUESTION: 88

Lathe machine with turret can turn a work piece of limited length only because

Solution:
QUESTION: 89

Tool life increases with increase in

Solution:
QUESTION: 90

The most important function of the cutting fluid is to

Solution:
QUESTION: 91

The mode of deformation of the metal during spinning is

Solution:
QUESTION: 92

The increase in hardness due to cold working, is called

Solution:
QUESTION: 93

When the molten metal is fed in the cavity of a metallic mould by gravity, the method of casting is known as

Solution:
QUESTION: 94

The negative rake is usually provided on

Solution:
QUESTION: 95

Flank wear occurs on the

Solution:
QUESTION: 96

Which of the following property is desirable for materials used in tools and machines ?

Solution:
QUESTION: 97

The property of a material due to which it breaks with little permanent distortion, is called

Solution:
QUESTION: 98

Malleable cast iron is produced

Solution:
QUESTION: 99

Connecting rod is , usually, made from

Solution:
QUESTION: 100

Which of the following is a point imperfection ?

Solution: