Test: Mechanical Engineering- 4


100 Questions MCQ Test Mock Test Series for SSC JE Mechanical Engineering | Test: Mechanical Engineering- 4


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This mock test of Test: Mechanical Engineering- 4 for Mechanical Engineering helps you for every Mechanical Engineering entrance exam. This contains 100 Multiple Choice Questions for Mechanical Engineering Test: Mechanical Engineering- 4 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Mechanical Engineering- 4 quiz give you a good mix of easy questions and tough questions. Mechanical Engineering students definitely take this Test: Mechanical Engineering- 4 exercise for a better result in the exam. You can find other Test: Mechanical Engineering- 4 extra questions, long questions & short questions for Mechanical Engineering on EduRev as well by searching above.
QUESTION: 1

An insulated rigid vessel contains a mixture of fuel and air. The mixture is ignited by a minutespark. The contents of the vessel experience.

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QUESTION: 2

The specific heats of an ideal gas depend on its

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QUESTION: 3

When an ideal gas with constant specific heats is throttled adiabatically, with negligible changes in
kinetic and potential energies.

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QUESTION: 4

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) ?

Solution:

Q = dU + PdV
Reversible closed system

TdS = du + Pdv

QUESTION: 5

The relationship ​ 0 holds good for

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QUESTION: 6

During the phase change of a pure substance

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QUESTION: 7

At the triple point of a pure substance, the number of degrees of freedom is

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QUESTION: 8

The standard value of atmospheric pressure taken at sea level is

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QUESTION: 9

For a perfect gas, according to Boyle's law

where p = Absolute pressure,
v = Volume, and
T = Absolute temperature

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QUESTION: 10

When a gas is heated, change takes place in

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QUESTION: 11

The general law for the expansion or compression of gases, is

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QUESTION: 12

The property of working substance which increases or decreases as the heat is supplied orremoved in a reversible manner, is known as

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QUESTION: 13

The use of Refrigerant R–22 for temperature below – 30º is not recommended due to its

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QUESTION: 14

Global warming is caused by

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QUESTION: 15

In the window air conditioner, the expansion device used is

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QUESTION: 16

Bell-Coleman cycle is a

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QUESTION: 17

In a reversed Brayton cycle, the heat is absorbed by the air during

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QUESTION: 18

The power output from a spark ignition engine is varied by

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QUESTION: 19

An air standard diesel cycle consists of

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QUESTION: 20

BHP of a diesel engine can be increased by

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QUESTION: 21

Alcohols are unsuitable at diesel engine fuels because

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QUESTION: 22

Knocking tendency in a SI engine reduces with increasing

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QUESTION: 23

​A diesel engine has

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QUESTION: 24

The colour of exhaust from diesel engine is generally

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QUESTION: 25

A economizer in a steam generator performs the function of

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QUESTION: 26

For a given set of operating pressure limits of a Rankine cycle the highest efficiency occurs for

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QUESTION: 27

In a Rankine cycle heat is added

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QUESTION: 28

Boiler rating is usually defined in terms of

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QUESTION: 29

In steam and other vapour cycle, the process of removing non-condensable is called

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QUESTION: 30

A gas turbine cycle with heat exchange and reheating improves

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QUESTION: 31

A gas turbine cycle with infinitely large number of stages during compression and expansionleads to

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QUESTION: 32

The high steam and low water safety valve is not used in

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QUESTION: 33

The draught in locomotive boilers is produced by a

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QUESTION: 34

All steam engines work on

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QUESTION: 35

Naiver Stoke's equation represents the conservation of

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QUESTION: 36

For the stability of a floating body, under the influence of gravity alone, which of the followingis TRUE ?

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QUESTION: 37

Streamlines, path lines and streak lines are virtually identical for

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QUESTION: 38

Existence of velocity potential implies that

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QUESTION: 39

Specific speed of a Kaplan turbine ranges between

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QUESTION: 40

Kalpan turbine is

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QUESTION: 41

The pressure of a liquid measured with the help of a piezometer tube is

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QUESTION: 42

A body floating in a liquid is said to be in neutral equilibrium, if its metacentre

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QUESTION: 43

The total head of a liquid particle in motion is equal to

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QUESTION: 44

A pitot tube is used to measure the

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QUESTION: 45

The specific speed of a turbine is given by the equation

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QUESTION: 46

The specific speed of a hydraulic turbine depends upon

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QUESTION: 47

The impeller of a centrifugal pump may have

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QUESTION: 48

A stone of mass m at the end of a string of length l is whirled in a vertical circle at a constant speed.The tension is the string will be maximum when the stone is

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QUESTION: 49

A steel wheel of 600 mm diameter on a horizontal steel rail. It carries a load of 500 N. Thecoefficient of rolling resistance is 0.3 The force in Newton, necessary to roll the wheel along therail is

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QUESTION: 50

 slack side in a flat belt drive is

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QUESTION: 51

A 1 kg block is resting on a surface with coefficient of friction μ = 0.1. A force of 0.8 N isapplied to the block as shown in the figure. The friction force is

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QUESTION: 52

A cylindrical elastic body subjected to pure torsion about its axis develops

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QUESTION: 53

A rod of length L and diameter D is subjected to a tensile load P. Which of the following is sufficientto calculate the resulting change in diameter ?

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QUESTION: 54

An elastic body is subjected to a tensile stress X in a particular direction and a compressive stressY in its perpendicular direction. X and Y are unequal in magnitude. On the plane of maximumshear stress in the body there will be

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QUESTION: 55

In terms of Poisson's ratio (m) the ratio of Young's Modulus (E) to Shear Modulus (G) of
elastic materials is
 

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QUESTION: 56

A long thin walled cylindrical shell, closed at both the ends, is subjected to an internal pressure.The ratio of the hoop stress (circumferential stress) to longitudinal stress developed in the shellis

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QUESTION: 57

A concentrated load P acts on a simply supported beam of span L at a distance L/3 from the left
support. The bending moment at the point of application of the load is given by

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QUESTION: 58

A cantilever beam of length L is subjected to a moment M at the free end. The moment of inertia of the beam cross section about the neutral axis is I and the Young's modulus is E. The magnitude of the maximum deflection is

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QUESTION: 59

A bolt is made to pass through a tube and both of them are tightly fitted with the help of washersand nuts. If the nut is tightened, then

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QUESTION: 60

The ratio of shear modulus to the modulus of elasticity for a elasticity for a Poisson's ratio of0.4 will be

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QUESTION: 61

According to Euler's column theory, the crippling load for a column of length (l) with one end fixed and the other end hinged, is

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QUESTION: 62

A column with maximum equivalent length has

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QUESTION: 63

The Rankine's formula holds good for

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QUESTION: 64

The number of degrees of freedom of a five link planer mechanism with five revolute pairs asshown in the figure is

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QUESTION: 65

For the planar mechanism shown in figure select the most appropriate choice ofr the motion oflink 2 when link 4 is moved upwards:

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QUESTION: 66

The mechanism used in a shaping machine is

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QUESTION: 67

When a cylinder is located in a Vee-block, the number of degrees of freedom which are arrestedis

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QUESTION: 68

List -I (Gear types)
a. Worm gears
b. Cross helical gears
c. Bevel gears
d. Spur gears

List – II (Application)
1. Parallel Shafts
2. Nonparallel, intersecting shafts
3. Non parallel, nonintersecting shafts
4. Large speed ratios

 

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QUESTION: 69

As shown in figure, a mass of 100 kg is held between two springs. The natural frequency of
vibration of the system in cycle/s, is

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QUESTION: 70

Which of the following is an example of sliding pair ?

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QUESTION: 71

The cam and follower is an example of

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QUESTION: 72

When the two elements of a pair have a surface contact when relative motion takes place and thesurface of one element slides over the surface of the other, the pair formed is known as a

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QUESTION: 73

The centre distance between two meshing involute gears is equal to

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QUESTION: 74

In the design of shafts made of ductile materials subjected to twisting moment and bendingmoment, the recommended theory of failure is

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QUESTION: 75

The outside diameter of a hollow shaft that is twice its inside diameter the ratio of its torquecarrying capacity to that of a solid shaft of the same material and the same outside diameter is

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QUESTION: 76

which theory of failure will you use for aluminium components under steady loading is

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QUESTION: 77

Torque to weight ratio for a circular shaft transmitting power is directly proportional to the

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QUESTION: 78

Starting friction is low in

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QUESTION: 79

Spherical roller bearings are normally used

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QUESTION: 80

In thick film hydrodynamic journal bearings the coefficient of friction

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QUESTION: 81

Riser is designed so as to

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QUESTION: 82

Chills are used in moulds to

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QUESTION: 83

Hot rolling of mild steel is carried out

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QUESTION: 84

Match the correct combination for following metal working processes.
Processes
P. Blanking
Q. Stretch Forming
R. Coining
S. Deep Drawing
Associated state of stress
1. Tension
2. Compression
3. Shear
4. Tension and Compression
5. Tension and shear

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QUESTION: 85

Wrinkling is a common defect found is

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QUESTION: 86

For gas welding a particular job using a neutral oxyacetylene flame the acetylene consumptionwas 10 liters. The oxygen consumption from the cylinder in liters will be

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QUESTION: 87

Preheating before welding is done to

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QUESTION: 88

The standard specification of a grinding wheel is A-46=M-6-V-21. It means a wheel of

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QUESTION: 89

Cutting speed in grindning is set to a high value of

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QUESTION: 90

Crater wear always starts at some distance from the tool tip because at the point

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QUESTION: 91

Which of the following material has maximum ductility?

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QUESTION: 92

The carbon in the pig iron varies from

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QUESTION: 93

​Shock resistance of steel is increased by adding

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QUESTION: 94

The bond formed by transferring electrons from one atom to another is called

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QUESTION: 95

During hot working of metals

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QUESTION: 96

Tubes for shaving cream and tooth paste are made by

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QUESTION: 97

The rake angle required to machine brass by high speed steel tool is

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QUESTION: 98

Crater wear leads to

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QUESTION: 99

The factor considered for evaluation of machinability is

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QUESTION: 100

Chip breakers are used to

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