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# Test: Mechanical Engineering- 13

## 100 Questions MCQ Test Mechanical Engineering SSC JE (Technical) | Test: Mechanical Engineering- 13

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This mock test of Test: Mechanical Engineering- 13 for Mechanical Engineering helps you for every Mechanical Engineering entrance exam. This contains 100 Multiple Choice Questions for Mechanical Engineering Test: Mechanical Engineering- 13 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Mechanical Engineering- 13 quiz give you a good mix of easy questions and tough questions. Mechanical Engineering students definitely take this Test: Mechanical Engineering- 13 exercise for a better result in the exam. You can find other Test: Mechanical Engineering- 13 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

### The Kelvin temperature of a system can be measured by a

Solution:
QUESTION: 4

If the work done on a closed system is 20kj/kg, and 40kj/kg heat is rejected from the system, its internal energy decreases by

Solution:
QUESTION: 5

If a heat engine attains 100% thermal efficiency, it violates

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QUESTION: 6

The more effective way of increasing the efficiency of a carnot engine is to

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QUESTION: 7

Kelvin-plank law deals with

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QUESTION: 8

First law of thermodynamics deals with

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QUESTION: 9

All perfect gases change in volume by 1/273th of its original volume at 0ºC for every 1ºC change in temperature, when the pressure remains constant. This statement is called

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QUESTION: 10

The absolute zero pressure can be attained at a temperature of

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QUESTION: 11

The heat energy stored in the gas and used for raising the temperature of the gas is known as

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QUESTION: 12

When a gas is heated at constant pressure

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QUESTION: 13

The capacity of refrigerating machine is expressed as

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QUESTION: 14

One tonnes of refrigeration is equal to

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QUESTION: 15

COP of a carnot heat pump operating between –3ºC and 27ºC is

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QUESTION: 16

Oil separator in a refrigeration cycle is installed.

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QUESTION: 17

In electrolux refrigerator

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QUESTION: 18

The intake charge in a diesel engine consists of

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QUESTION: 19

All of followings are correct except: Inlet -valve mach index is dependent on

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QUESTION: 20

When crude oil is heated, then which one of the following hydrocarbon is given off first ?

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QUESTION: 21

Octane number of natural gas is

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QUESTION: 22

The air-fuel ratio of the petrol engine is controlled by

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QUESTION: 23

In a four stroke cycle petrol engine, the charge is ignited at

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QUESTION: 24

In a four stroke cycle , the minimum temperature inside the engine cylinder occurs at the

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QUESTION: 25

The fuel mostly used in boilers is

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QUESTION: 26

The incomplete combustion is indicated by the presence of

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QUESTION: 27

The diameter of the cylindrical shell of a Lancashire boiler is about

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QUESTION: 28

The function of an economizer in a steam power plant is to

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QUESTION: 29

Match List-I (Boiler) with List-II and select the correct answer using the codes given below the
lists:

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QUESTION: 30

The basic raw material of the nuclear power plant is

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QUESTION: 31

Steam coal is

Solution:
QUESTION: 32

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

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QUESTION: 33

An economiser is generally placed between

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QUESTION: 34

The draught may be produced by a

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QUESTION: 35

The velocity distribution in a viscous flow over a plate is given by

u = 4y – y2

where, u = velocity in m/s at a point distanty fromthe plate. If the coefficient of dynamic viscosityis 1.5 pa.s, What is the shear stress at y = 1m?

Solution:
QUESTION: 36

In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle
q, sensitivity of inclined tube to sensitivity of U– tube equal to

Solution:
QUESTION: 37

The centre of pressure of a surface subject to fluid pressure is the point

Solution:
QUESTION: 38

Match List - I withList -II and select the correct
answer using the codes given below the lists:
List-I
a. Stream line
b. Streak line
c. Path line
d. Equipotential lines
List-II
1. Tracing of motion of any fluid particle
2. Tracing of motion of different fluid particles
3. Identification of location of number of fluid
particles
4. Orthogonal to streak lines
5. Location of equal piezometric head

Solution:
QUESTION: 39

How is the metacentric height (GM) expressed

Where I =Moment of inertia of the plan of the floating body at the water surface
V=Volume of the body submerged in water
BG =Distance between the center of gravity (G) and the center of Buoyancy (B)

Solution:
QUESTION: 40

A type of flow in which the fluid particle while moving in the direction of flow rotates about their centre is known as

Solution:
QUESTION: 41

The length of divergent part of venturimeter in comparision to convergent portion is

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QUESTION: 42

The absolute pressure is equal to

Solution:
QUESTION: 43

A vertically immersed surface is shown in fig. The distance of its centre of pressure from the water surface is

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QUESTION: 44

Bernoulli's equation is applied to

Solution:

Bernoulli's equation is applicable to venturimeter, orifice meter and pitit tube.

QUESTION: 45

The discharge over a rectangular weir, considering the velocity of approach, is

where H1 =Total height of water above the weir = H + Ha
H=Height of water, over the crest of the weir, and
Ha =Height of water, due to velocity of approach

Solution:
QUESTION: 46

In an inward flow reaction turbine

Solution:
QUESTION: 47

The flow ratio in case of Francis turbine varies from

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QUESTION: 48

The loss of strength in compression due to overloading is known is as

Solution:
QUESTION: 49

The following figure shows the stress-strain curve for tensile test on a mild steel specimen.

The upper yield point is represented by the point

Solution:
QUESTION: 50

If the Young's modulus E is equal to bulk modulus K, then the value of Poisson's ratio is

Solution:
QUESTION: 51

Which one of the following material has Poisson's ratio more than 1?

Solution:
QUESTION: 52

The following torsional terms is analogous to bending terms except

Solution:
QUESTION: 53

Which one of the following portions of the loaded beam shown in the figure is subjected to pure
bending?

Solution:
QUESTION: 54

The steel bars in reinforced cement concrete beam are located at

Solution:
QUESTION: 55

Modulus of rigidity may be defined as the ratio of

Solution:
QUESTION: 56

A bar of length L metres extends by l mm under a tensile force of P. The strain produced in the bar is

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QUESTION: 57

The state of stress at a point in a loaded member is shown fig. The magnitude of maximum shear stress is

Solution:
QUESTION: 58

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

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QUESTION: 59

In a simple bending of beams, the stress in the beam varies

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QUESTION: 60

The matter contained in a body, is called

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Mass is defined as the quantity of matter contained in a body.

QUESTION: 61

Two bodies of masses m1 and m2 are hung from the ends of a rope, passing over a frictionless
pulley as shown fig. The acceleration of the string will be

Solution:
QUESTION: 62

The unit of angular velocity is

Solution:
QUESTION: 63

The motion of a particle round a fixed axis is

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QUESTION: 64

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QUESTION: 65

The ratio of the ultimate stress to the design stress is known as

Solution:
QUESTION: 66

The diameter of the cylindrical rod on which threads are cut is known as

Solution:
QUESTION: 67

Failure of a material is called fatigue when it fails

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QUESTION: 68

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QUESTION: 69

In case of pressure vessels having closed ends, the fluid pressure induces

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QUESTION: 70

The pipe joint mostly used for pipes carrying water at low pressure is

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QUESTION: 71

The lead screw of a lathe with nut is a

Solution:
QUESTION: 72

A Kinematic chain is known as mechanism when

Solution:
QUESTION: 73

According to Kennedy's therorem, the instantaneous centres of three bodies havingrelative motion lie on a

Solution:
QUESTION: 74

A Hook's joint is used to connect

Solution:
QUESTION: 75

The maximum efficiency of worm and worm wheel system is

Solution:
QUESTION: 76

In which one of the following is a flywheel generally employed

Solution:
QUESTION: 77

The motion of a shaft in a circular hole is an example of

Solution:
QUESTION: 78

The relation between number of links (l) and number of joints (j) in a kinematic chain is

Solution:
QUESTION: 79

The mechanism forms a structure, when the number of degrees of freedom (n) is equal to

Solution:
QUESTION: 80

Scotch yoke mechanism is used to generate

Solution:
QUESTION: 81

The relative ability of the liquid metal to fill in the mould at a given temperature is knowns as

Solution:
QUESTION: 82

which of the following gating ratio represents pressurised gating systems ?

Solution:
QUESTION: 83

Which of the following are the most likely characteristics in centrifugal casting ?

Solution:
QUESTION: 84

Which of the following casting process can suitably replace a rolling operation?

Solution:
QUESTION: 85

Angle between the face and flank of the single point cutting tool is known as

Solution:
QUESTION: 86

Single point thread cutting tool should ideally have

Solution:
QUESTION: 87

A turret lathe is useful for

Solution:
QUESTION: 88

Grinding wheel is balanced

Solution:
QUESTION: 89

The soldering process is carried out in the temperature range

Solution:
QUESTION: 90

The main constituents of soldering alloy are

Solution:
QUESTION: 91

material removed by machanical action in

Solution:
QUESTION: 92

Grey cast iron has

Solution:
QUESTION: 93

Which of the following is a point imperfection?

Solution:
QUESTION: 94

The heat treatment process used for castings is

Solution:
QUESTION: 95

Induction hardening is basically a

Solution:
QUESTION: 96

Babbit metal is a

Solution:
QUESTION: 97

Monel meteal is an alloy of

Solution:
QUESTION: 98

Loam sand is a mixture of

Solution:
QUESTION: 99

The welding process used in joining mild steel shanks to high speed drills, is

Solution:
QUESTION: 100

In shielded arc welding

Solution: