Test: Mechanical Engineering-1


100 Questions MCQ Test Mock Test Series for SSC JE Mechanical Engineering | Test: Mechanical Engineering-1


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

An ideal gas at 27ºC is heated at constant pressure till its volume becomes three times. What would be then the temperature of gas?

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QUESTION: 2

Measurement of temperature is based on which law of thermo dynamics?

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QUESTION: 3

Hot coffee stored in a well insulated thermos flask is an example of

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QUESTION: 4

Which one of the following expresses the reversible work done by the system (steady flow)
between states 1 and 2?

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QUESTION: 5

A closed system receives 60 kJ heat but its internal energy decreases by 30 kJ. Then the work done by the system is

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QUESTION: 6

Work transfer between the system and the surroundings

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QUESTION: 7

The value of for an irreversible cycle is

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QUESTION: 8

One Joule (J) is equal to

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1 joule (J) = 1.00 newton meters (N-m)

QUESTION: 9

The temperature at which the volume of a gas becomes zero is called

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QUESTION: 10

The molecular mass expressed in gram (i.e. 1 gmole) of all gases, at N. T. P., occupies a volume of

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QUESTION: 11

The sum of internal energy (U) and the product of pressure and volume (p.v) is known as

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QUESTION: 12

Carnot cycle has maximum efficiency for

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QUESTION: 13

A refrigeration system

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QUESTION: 14

The C.O.P. of a refrigerator working on a reversed Carnot cycle is where
T1 = Lowest absolute temperature, and
T2 = Highest absolute temperature

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QUESTION: 15

The leakage in a refrigeration system using freon is detected by

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QUESTION: 16

The COP of a heat pump βhp and the COP of a refrigerator βRef are related as

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QUESTION: 17

In electrolux refrigerator

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QUESTION: 18

The correct sequence of the given four cycles on T-s plane in figure 1, 2, 3, 4 is

(1)

(2)

(3)

(4)

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QUESTION: 19

An Otto cycle has a compression ratio of 8. If 250 kJ of work is extracted from the cycle, the heat rejected by the cycle is

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QUESTION: 20

The two reference fuels used for cetane rating are

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QUESTION: 21

The stoichiometric air-fuel ratio for petrol is 15 :

1. What is the air-fuel ratio regarded for maximum power ?

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QUESTION: 22

Match List-I (SI Engine Operating Mode) with List –II (Appromimate A/F Ratio) and select the correct answer using the code given below the lists

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QUESTION: 23

A spark plug gap is kept from

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QUESTION: 24

The ignition quality of petrol is expressed by

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QUESTION: 25

Which of the following is not a boiler mounting?

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QUESTION: 26

The function of a safety valve is

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QUESTION: 27

An air preheater is installed

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QUESTION: 28

Match List-I (Type of boiler) with List-II (Classification of boiler) select the correct answer
using the codes given below the lists:

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QUESTION: 29

Benson boiler is one of the high pressure boilers having

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QUESTION: 30

The draught in locomotive boilers is produced by

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QUESTION: 31

The function of economizer in a boiler is to

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QUESTION: 32

The critical pressure ratio for maximum discharge through a nozzle is given by

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QUESTION: 33

Surging basically implies

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QUESTION: 34

Phenomenon of chocking in compressor means

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QUESTION: 35

The instantaneous centre of rotation of a rigid thin disc rolling on a plane rigid surface is located at

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QUESTION: 36

A four-bar chain has

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QUESTION: 37

Which one of thefollowing conversions is used by a lawn-sprinkler which is a four barme chanisms?

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QUESTION: 38

Which one of the following drives is used for a constant velocity ratio, positive drive with large centre distance between the driver and driven shafts?

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QUESTION: 39

The number of degrees of freedom of an epicyclic gear train is

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QUESTION: 40

In which one of the following is a fly wheel generally employed?

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QUESTION: 41

The motion between a pair when limited to a definite direction, irrespective of the direction of force, applied, is known as

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QUESTION: 42

Which of the following is an example of a higher pair?

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QUESTION: 43

The relation between number of pairs (P) forming a kinematic chain and the number of links (l)

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QUESTION: 44

The design calculations for members subject to fluctuating lads with the same factor of safety yield the most conservative estimates when using

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QUESTION: 45

When a nut is tightened by placing a washer below it the bolt will be subjected to

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QUESTION: 46

In a fillet welded joint, the weakest area of the weld is

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QUESTION: 47

18/8 steel contains

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QUESTION: 48

An aluminium member is designed on the basis of

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QUESTION: 49

Guest's theory is used for

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QUESTION: 50

The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kv as

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QUESTION: 51

The dimensions of surface tension are

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QUESTION: 52

If the surface tension of water air interface is 0.073 N/m, the gauge pressure inside a rain drop
of 1 mm diameter will be

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QUESTION: 53

When can a piezometer be not used for pressure measurement in pipes?

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QUESTION: 54

Three immiscible liquids of specific densities ρ , 2ρ and 3ρ are kept in a jar. The height of the liquids in the jar and at the piezo meter fitted to the bottom of the jar are as shown in the figure below.

The ratio H/h is.

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QUESTION: 55

The critical value of Reynolds number for transition from laminar to turbulent boundary layer in external flows is taken as

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QUESTION: 56

The head loss in turbulent flow in pipe varies

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QUESTION: 57

Laminar flow between closely spaced parallel plates is governed by the consideration of which one of the following pair of forces?

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QUESTION: 58

A centrifugal pump gives maximum efficiency when its blades are

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QUESTION: 59

A manometer is used to measure

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QUESTION: 60

When a body is placed over a liquid, it will float if

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QUESTION: 61

The discharge through a large rectangular orifice is given by

where H1= Height of the liquid above the top of the orifice,
H2= Height of the liquid abvoe the bottom of the orifice,
b = Breadth of the orifice, and
Cd= Coefficient of discharge

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QUESTION: 62

The coefficient of viscosity may be determined by

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QUESTION: 63

The unit discharge through the turbine is

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QUESTION: 64

The deformation of a bar under its own weight as compared to that when subjected to a direct axial load equal to its own weight will be

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QUESTION: 65

What is the relationship between the linear elastic properties; Young's modulus (E), rigidity modulus
(G) and bulk modulus (K)?

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QUESTION: 66

Which one of the following mohr's circles represents the state of pure shear?

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QUESTION: 67

Auto frettage is the method of

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QUESTION: 68

A simply supported beam is loaded as shown in the figure below.


The maximum shear force in the beam will be

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QUESTION: 69

The ratio of the compressive critical load for a long column fixed at both the ends and a column with one end fixed and the other end free is

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QUESTION: 70

A short column of external diameter D and internal diameter d carries an eccentric load W.
The greatest eccentricity which the load can be applied without producing tension on the crosssection of the column would be

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QUESTION: 71

The Poisson's ratio for cast iron varies from

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QUESTION: 72

The relation between Young's modulus (E), shear modulus (C) and bulk modulus (K) is given by

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QUESTION: 73

The point of contraflexure occurs in

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QUESTION: 74

The slenderness ratio is the ratio of

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QUESTION: 75

Fatigue test is carried out for

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QUESTION: 76

According to lami's theorem

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QUESTION: 77

A couple produces

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QUESTION: 78

The ratio of static friction to dynamic friction is always

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QUESTION: 79

A framed structure as shown fig. is a

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QUESTION: 80

Eutectoid reaction occurs at

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QUESTION: 81

Addition of magnesium to cast iron increases its

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QUESTION: 82

Consider the following quenching media:
1. Oil
2. Water
3. WaterNaOH
4. Brine

The correct sequence of these media in order of increasing hardness of steel ounder going heat
treatment is

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QUESTION: 83

Gunmetal, which is used in journal bearings, contains

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QUESTION: 84

A sand casting mould assembly is shown in the given figure. The elements marked A and B are respectively

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QUESTION: 85

The process of removing the burrs of flash from a forged component in drop forging is called

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QUESTION: 86

Which one of the following processes is the wire drawing process?

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QUESTION: 87

High speed electron beam of electron beam welding is focused on the weld spot using

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QUESTION: 88

The ratio between Oxygen and Acetylene gases for neutral flame in gas welding is

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QUESTION: 89

The instrument or device used to measure the cutting forces in machings is

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QUESTION: 90

Which of the following property is desirable in parts subjected to shock and impact loads?

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QUESTION: 91

Wrought iron

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QUESTION: 92

18 - 4 - 1 high speed steel contains

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QUESTION: 93

The type of tool used on lathe, shaper and planer is

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QUESTION: 94

Flank wear occurs mainly on the

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QUESTION: 95

Cutting fluids are used to

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QUESTION: 96

The tool life is said to be over if

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QUESTION: 97

A mandrel is used to hold

Solution:
QUESTION: 98

In a planer

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QUESTION: 99

Surface grinding is done to produce

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QUESTION: 100

A simply supported beam 'A' of length l, breadth b and depth d carries a central load W. Another beam 'B' of the same dimensions carries a central load equal to 2 W. The deflection of beam 'B' will be __________ as that of beam 'A'.

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