Official Paper

SSC JE Mechanical 6 Nov 2024 Official Paper II (Previous Year Paper)

100 questions · 120 minutes · with answers · free

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General Engineering (100 questions)

1

While deaerating the steam, when water is heated to 100∘ C, another steam is introduced known as............... .

  1. ((a))

    scorching steam

  2. ((b))

    pegging steam

  3. ((c))

    charging steam

  4. ((d))

    monochrome steam

Show Answer
Answer: ((a))

scorching steam

2

Identify the measuring set-up shown in the following figure.

  1. ((a))

    Pitot tube

  2. ((b))

    Diaphragm gauge

  3. ((c))

    Bernoulli's tube

  4. ((d))

    Switch gauge

Show Answer
Answer: ((a))

Pitot tube

3

Identify the cycle on the basis of its P-h diagram.

  1. ((a))

    Stirling cycle

  2. ((b))

    Vapour compression refrigerant cycle

  3. ((c))

    Brayton cycle

  4. ((d))

    Mollier cycle

Show Answer
Answer: ((a))

Stirling cycle

4

Assertion (A): While tensile testing of gold, necking phenomenon occurred.

Reason (R): Gold is a brittle material.

  1. ((a))

    A is true but R is false

  2. ((b))

    Both A and R are true

  3. ((c))

    A is false but R is true

  4. ((d))

    Both A and R are false

Show Answer
Answer: ((a))

A is true but R is false

5

Thermo-siphon type of IC engine cooling system _________ .

  1. ((a))

    does not use a pump for water circulation

  2. ((b))

    uses a condenser for cooling

  3. ((c))

    uses grease as working fluid

  4. ((d))

    uses a compressor for water circulation

Show Answer
Answer: ((a))

does not use a pump for water circulation

6

Identify Point A in the given figure.

  1. ((a))

    Triple point

  2. ((b))

    Saturation point

  3. ((c))

    Critical point

  4. ((d))

    Superheated point

Show Answer
Answer: ((a))

Triple point

7

Identify the correct pair from the following.

  1. ((a))

    Otto cycle → Petrol engines

  2. ((b))

    Diesel engines → Electric vehicles

  3. ((c))

    Carnot cycle → Compressors

  4. ((d))

    Brayton cycle → Chillers

Show Answer
Answer: ((a))

Otto cycle → Petrol engines

8

Which of the following statements related to the efficiency of a roots blower is correct?

  1. ((a))

    It is a ratio of actual work done to ideal work done.

  2. ((b))

    It is a ratio of actual volume to ideal volume required.

  3. ((c))

    It is a ratio of ideal volume to actual volume required.

  4. ((d))

    It is a ratio of isentropic work done to actual work done.

Show Answer
Answer: ((a))

It is a ratio of actual work done to ideal work done.

9

Which of the following is NOT a safety valve used in a boiler?

  1. ((a))

    Pin safety valve

  2. ((b))

    Dead weight safety valve

  3. ((c))

    Lever safety valve

  4. ((d))

    Spring loaded safety valve

Show Answer
Answer: ((a))

Pin safety valve

10

Match the columns. 

  1. ((a))

    A-2; B-3; C-1

  2. ((b))

    A-2; B-1; C-3

  3. ((c))

    A-1; B-3; C-2

  4. ((d))

    A-3; B-1; C-2

Show Answer
Answer: ((a))

A-2; B-3; C-1

11

Identify the correct pair from the following.

  1. ((a))

    Secondary refrigerant → R12

  2. ((b))

    Secondary refrigerant → R1150

  3. ((c))

    Secondary refrigerant → Brine

  4. ((d))

    Secondary refrigerant → R11

Show Answer
Answer: ((a))

Secondary refrigerant → R12

12

Relative density is also termed as ______.

  1. ((a))

    buoyancy

  2. ((b))

    floatability

  3. ((c))

    acceleration

  4. ((d))

    specific gravity

Show Answer
Answer: ((a))

buoyancy

13

Tensile forces on the arms of a flywheel are due to the ______.

  1. ((a))

    kinetic forces

  2. ((b))

    lateral deviation

  3. ((c))

    longitudinal variation

  4. ((d))

    centrifugal forces

Show Answer
Answer: ((a))

kinetic forces

14

Which of the following statements is correct with respect to the Cochran boiler?

  1. ((a))

    It has high rate of steam generation

  2. ((b))

    It requires high floor area

  3. ((c))

    High room head is required for its installation due to the vertical design

  4. ((d))

    It has high initial installation cost

Show Answer
Answer: ((a))

It has high rate of steam generation

15

Coefficient of performance for vapour compression refrigeration is _____ proportional to evaporator temperature and ______ proportional to condenser temperature.

  1. ((a))

    inversely, inversely

  2. ((b))

    directly, directly

  3. ((c))

    directly, inversely

  4. ((d))

    inversely, directly

Show Answer
Answer: ((a))

inversely, inversely

16

Identify the correct pair in terms of type of process and the temperatures they are carried out from the following options.

  1. ((a))

    Brazing → Below 300∘ C

  2. ((b))

    Soldering → Above 1500∘ C

  3. ((c))

    Brazing → Above 1500∘ C

  4. ((d))

    Soldering → Below 300∘ C

Show Answer
Answer: ((a))

Brazing → Below 300∘ C

17

Calculate the depth of the centre of pressure for the following body submerged in water.

  1. ((a))

    h/4

  2. ((b))

    h/3

  3. ((c))

    h

  4. ((d))

    h/2

Show Answer
Answer: ((a))

h/4

18

Identify the correct option based on the following statements pertaining to steam.

A: At a given pressure, the capacity of superheated steam to do work will be comparatively higher.

B: Dryness fraction is a term related to quality of steam.

C: Wet steam does not exist.

  1. ((a))

    Both A and B are true

  2. ((b))

    Only C is true

  3. ((c))

    Only A is true

  4. ((d))

    Both A and C are true

Show Answer
Answer: ((a))

Both A and B are true

19

Steam tables are available either on _____ or ______ basis.

  1. ((a))

    temperature, velocity

  2. ((b))

    pressure, dryness

  3. ((c))

    pressure, temperature

  4. ((d))

    velocity, dryness

Show Answer
Answer: ((a))

temperature, velocity

20

Natural draught for exhaust gases is provided during the working of a steam generator by ________.

  1. ((a))

    feed valves

  2. ((b))

    chimneys

  3. ((c))

    conductors

  4. ((d))

    compressors

Show Answer
Answer: ((a))

feed valves

21

Match the given stages of the valve timing diagram for four-stroke petrol engines with their respective positions. 

 

Column A (Stages)Column B (Position)
A. Exhaust valve opens1. 10°-20° before top dead centre
B. Exhaust valve closes2. 30°-50° before bottom dead centre
C. Inlet valve opens3. 10°-15° after top dead centre
  1. ((a))

    A-3; B-1; C-2

  2. ((b))

    A-2; B-3; C-1

  3. ((c))

    A-2; B-1; C-3

  4. ((d))

    A-1; B-3; C-2

Show Answer
Answer: ((a))

A-3; B-1; C-2

22

Which of the following statements is correct with respect to definition of sensible heat factor?

  1. ((a))

    It is a ratio of sensible heat to total heat of the system.

  2. ((b))

    It is a ratio of total heat to usable heat of the system.

  3. ((c))

    It is a ratio of total heat to sensible heat of the system.

  4. ((d))

    It is a ratio of total heat to available heat of the system.

Show Answer
Answer: ((a))

It is a ratio of sensible heat to total heat of the system.

23

Identify the correct expression from the following options.

  1. ((a))

    Brake power = Indicated power + Friction power

  2. ((b))

    Brake power = Indicated power / Friction power

  3. ((c))

    Brake power = Indicated power * Friction power

  4. ((d))

    Brake power = Indicated power - Friction power

Show Answer
Answer: ((a))

Brake power = Indicated power + Friction power

24

________ is a vertical boiler.

  1. ((a))

    Cochran boiler

  2. ((b))

    Locomotive boiler

  3. ((c))

    Babcock and Wilcox boiler

  4. ((d))

    Lancashire boiler

Show Answer
Answer: ((a))

Cochran boiler

25

________ is also known as the principle of transmission of fluid pressure.

  1. ((a))

    Buoyancy law

  2. ((b))

    Pascal's law

  3. ((c))

    Newton's law

  4. ((d))

    Archimedes' principle

Show Answer
Answer: ((a))

Buoyancy law

26

Match the columns.

Column A (Compressor)Column B (Feature)
A. Screw compressor1. Compressor and motor operate on same shaft
B. Hermetically sealed compressor2. Uses piston assembly
C. Reciprocating compressor3. Rotary type
  1. ((a))

    A-3; B-1; C-2

  2. ((b))

    A-2; B-3; C-1

  3. ((c))

    A-2; B-1; C-3

  4. ((d))

    A-1; B-3; C-2

Show Answer
Answer: ((a))

A-3; B-1; C-2

27

Identify the part of the flywheel indicated as 'A' in the following figure.

  1. ((a))

    Hub

  2. ((b))

    Frame

  3. ((c))

    Spoke

  4. ((d))

    Rim

Show Answer
Answer: ((a))

Hub

28

According to the Darcy-Weisbach equation for flow through pipe, head loss due to friction is inversely proportional to which of the following pipe parameters?

  1. ((a))

    Diameter of the pipe

  2. ((b))

    Material type of the pipe

  3. ((c))

    Colour of the pipe

  4. ((d))

    Weight of the pipe

Show Answer
Answer: ((a))

Diameter of the pipe

29

Identify the correct statement with respect to centrifugal pumps.

  1. ((a))

    Forward curved vanes can handle high flow rates.

  2. ((b))

    Forward curved vanes have concave side of curvature facing direction of fluid flow.

  3. ((c))

    In radial vanes, the fluid does not flow radially outward/inward from centre of rotation.

  4. ((d))

    Backward curved vanes can handle high flow rates.

Show Answer
Answer: ((a))

Forward curved vanes can handle high flow rates.

30

The temperature at which liquid droplets just appear when moist air is cooled continuously is called ______.

  1. ((a))

    flash point temperature

  2. ((b))

    fire temperature

  3. ((c))

    pour point temperature

  4. ((d))

    dew point temperature

Show Answer
Answer: ((a))

flash point temperature

31

Statements:

A) SI engine does not consist of a spark plug.

B) CI engine does not consist of a spark plug.

  1. ((a))

    Both statements are true

  2. ((b))

    Statement B is true but Statement A is false

  3. ((c))

    Both statements are false

  4. ((d))

    Statement A is true but Statement B is false

Show Answer
Answer: ((a))

Both statements are true

32

Match column A with column 

Column A (Boiler)Column B (Pressure)
A. Cochran boiler1. Medium pressure
B. Babcock and Wilcox boiler2. Low pressure
C. Locomotive3. High pressure boilers
  1. ((a))

    A-2; B-3; C-1

  2. ((b))

    A-1; B-2; C-3

  3. ((c))

    A-2; B-1; C-3

  4. ((d))

    A-1; B-3; C-2

Show Answer
Answer: ((a))

A-2; B-3; C-1

33

Barometric pressure is also known as _______.

  1. ((a))

    fluid pressure

  2. ((b))

    volumetric pressure

  3. ((c))

    atmospheric pressure

  4. ((d))

    density

Show Answer
Answer: ((a))

fluid pressure

34

Which of the following Statements is/are correct:

A) Mechanical efficiency of a single-cylinder four-stroke engine is the ratio of brake power to indicated power.

B) Volumetric efficiency of SI engine is generally less than 30%.

C) Volumetric efficiency of CI engine is generally less than 30%.

  1. ((a))

    Only Statement C

  2. ((b))

    Only Statement A

  3. ((c))

    Only Statement B

  4. ((d))

    Only Statements B and C

Show Answer
Answer: ((a))

Only Statement C

35

Two types of radiators used for IC engine systems are _____ and _______ .

  1. ((a))

    tubular core type, cellular core type

  2. ((b))

    tubular core type, reciprocating core type

  3. ((c))

    reciprocating core type, rotating core type

  4. ((d))

    rotating core type, cellular core type

Show Answer
Answer: ((a))

tubular core type, cellular core type

36

Which of the following efficiencies is NOT related to turbines?

  1. ((a))

    Mechanical efficiency

  2. ((b))

    Hydraulic efficiency

  3. ((c))

    Machine efficiency

  4. ((d))

    Volumetric efficiency

Show Answer
Answer: ((a))

Mechanical efficiency

37

Assertion (A): Hot tea kept in a thermos flask remains hot for a longer duration.

Reason (R): A thermos flask is an example of a closed system.

  1. ((a))

    Both A and R are true

  2. ((b))

    A is false but R is true

  3. ((c))

    Both A and R are false

  4. ((d))

    A is true but R is false

Show Answer
Answer: ((a))

Both A and R are true

38

Identify the INCORRECT statement from the following options.

  1. ((a))

    Stainless steels are a type of alloy steels.

  2. ((b))

    Stainless steel contains chromium.

  3. ((c))

    Stainless steels are a type of non-ferrous steels.

  4. ((d))

    Stainless steels are resistant to corrosion.

Show Answer
Answer: ((a))

Stainless steels are a type of alloy steels.

39

Velocity potential function is a/an _______ .

  1. ((a))

    infinite quantity

  2. ((b))

    vector quantity

  3. ((c))

    elemental quantity

  4. ((d))

    scalar quantity

Show Answer
Answer: ((a))

infinite quantity

40

Identify whether the given statements are true or false.

Statements:

A) In a double acting compressor, suction and expansion take place in two different strokes.

B) In single acting compressors, both suction and expansion stroke take place in two different strokes.

  1. ((a))

    Both statements are false

  2. ((b))

    Statement B is true but Statement A is false

  3. ((c))

    Statement A is true but Statement B is false

  4. ((d))

    Both statements are true

Show Answer
Answer: ((a))

Both statements are false

41

Which of the following is NOT a minor energy (head) loss?

  1. ((a))

    Loss due to enlargement

  2. ((b))

    Loss due to obstruction in pipe

  3. ((c))

    Loss due to friction

  4. ((d))

    Loss due to contraction

Show Answer
Answer: ((a))

Loss due to enlargement

42

The graphical representation of transformation of 1 kg of ice into 1 kg of superheated steam at constant pressure is known as □( ) .

  1. ((a))

    u-v diagram

  2. ((b))

    h-s diagram

  3. ((c))

    p-v diagram

  4. ((d))

    t-h diagram

Show Answer
Answer: ((a))

u-v diagram

43

Loss of head occurring due to bend in pipe during fluid flow is considered as _______.

  1. ((a))

    minor loss

  2. ((b))

    resultant loss

  3. ((c))

    recording loss

  4. ((d))

    major loss

Show Answer
Answer: ((a))

minor loss

44

Identify the correct statement with reference to definition of coefficient of discharge for a steam nozzle.

  1. ((a))

    Ratio of actual discharge to theoretical discharge.

  2. ((b))

    Ratio of total discharge to leaked discharge.

  3. ((c))

    Ratio of theoretical discharge to total discharge.

  4. ((d))

    Ratio of theoretical discharge to actual discharge.

Show Answer
Answer: ((a))

Ratio of actual discharge to theoretical discharge.

45

The work of a compressor in a vapour compression refrigeration system is to _______.

  1. ((a))

    increase the volume of the refrigerant at constant entropy

  2. ((b))

    increase the temperature of the refrigerant at constant entropy

  3. ((c))

    increase the pressure of the refrigerant at constant entropy

  4. ((d))

    increase the velocity of the refrigerant at constant entropy

Show Answer
Answer: ((a))

increase the volume of the refrigerant at constant entropy

46

Which of the following statements based on the given figure is/are correct?

<br>

Statements:

A) Point Y represents rupture strength.

B) Point E represents elastic limit.

C) Point P represents proportional limit.

  1. ((a))

    Only Statements B and C

  2. ((b))

    Only Statement A

  3. ((c))

    Only Statement C

  4. ((d))

    Only Statement B

Show Answer
Answer: ((a))

Only Statements B and C

47

An oil of specific gravity 0.9 flows through a 0.1 m diameter pipe under a pressure of 100 kPa. The centre line of the pipe is 5 m above the datum line, and the total energy with respect to the datum is 0.04 kJ/N. Then the discharge of the oil through the pipe in litre per second is

  1. ((a))

    170

  2. ((b))

    340

  3. ((c))

    85

  4. ((d))

    677

Show Answer
Answer: ((a))

170

48

In a rotameter, the float position indicates ______.

  1. ((a))

    weight

  2. ((b))

    viscosity

  3. ((c))

    density

  4. ((d))

    flow rate

Show Answer
Answer: ((a))

weight

49

In case of liquids, _______ can be seen as cohesive forces between molecules of liquid.

  1. ((a))

    adaptability

  2. ((b))

    transferability

  3. ((c))

    permeability

  4. ((d))

    viscosity

Show Answer
Answer: ((a))

adaptability

50

Identify point A in the following figure.

  1. ((a))

    Critical point

  2. ((b))

    Triple point

  3. ((c))

    Saturation point

  4. ((d))

    Superheated point

Show Answer
Answer: ((a))

Critical point

51

Archimedes' principle discusses _______.

  1. ((a))

    viscosity

  2. ((b))

    illuminance

  3. ((c))

    potency

  4. ((d))

    buoyancy

Show Answer
Answer: ((a))

viscosity

52

The value of static friction is between ______ and limiting friction.

  1. ((a))

    10

  2. ((b))

    0

  3. ((c))

    15

  4. ((d))

    5

Show Answer
Answer: ((a))

10

53

In order to grind material with high tensile strength _____ abrasive is predominantly used on abrasive wheels.

  1. ((a))

    aluminium oxide

  2. ((b))

    sodium chloride

  3. ((c))

    manganese

  4. ((d))

    copper

Show Answer
Answer: ((a))

aluminium oxide

54

Based on the following P-V and T-s diagrams, identify the IC engine cycle.

  1. ((a))

    Brayton cycle

  2. ((b))

    Diesel cycle

  3. ((c))

    Otto cycle

  4. ((d))

    Stirling cycle

Show Answer
Answer: ((a))

Brayton cycle

55

Match column A with column B.

Column A (Law of Thermodynamics)Column B (Concept)
A. Zeroth law1. Conservation of energy
B. First law2. Entropy
C. Second law3. Thermal equilibrium
  1. ((a))

    A-2; B-1; C-3

  2. ((b))

    A-1; B-3; C-2

  3. ((c))

    A-3; B-1; C-2

  4. ((d))

    A-2; B-3; C-1

Show Answer
Answer: ((a))

A-2; B-1; C-3

56

A ______ is provided to remove the water from a steam-water mixture in a boiler.

  1. ((a))

    lever valve

  2. ((b))

    pin check

  3. ((c))

    fusible plug

  4. ((d))

    steam trap

Show Answer
Answer: ((a))

lever valve

57

Calculate the depth of centre of pressure for the following body (circular plate) submerged in water (where D is diameter and G is centre of gravity).

  1. ((a))

    D/2

  2. ((b))

    D/3

  3. ((c))

    5D/8

  4. ((d))

    5D/4

Show Answer
Answer: ((a))

D/2

58

Statements:

A) Work done by a system on its surroundings is treated as a negative quantity.

B) Energy transfer as heat to a system from its surroundings is treated as a positive quantity.

  1. ((a))

    Both A and B are true

  2. ((b))

    A is true but B is false

  3. ((c))

    A is false but B is true

  4. ((d))

    Both A and B are false

Show Answer
Answer: ((a))

Both A and B are true

59

Which of the following is NOT a type of lathe machine?

  1. ((a))

    Turret lathe

  2. ((b))

    Tool room lathe

  3. ((c))

    Boiler room lathe

  4. ((d))

    Bench lathe

Show Answer
Answer: ((a))

Turret lathe

60

Which of the following is a 100% reaction turbine?

  1. ((a))

    Hero's turbine

  2. ((b))

    Rateau turbine

  3. ((c))

    Curtis turbine

  4. ((d))

    De-Laval turbine

Show Answer
Answer: ((a))

Hero's turbine

61

Given in the options are terminologies related to the valve timing diagram of an IC engine and their full forms. Identify the full form that is correctly paired with its short form.

  1. ((a))

    FVO → First valve operation

  2. ((b))

    TDC → Top dead centre

  3. ((c))

    BDC → Burden dead core

  4. ((d))

    IVC → Intake valve corrosion

Show Answer
Answer: ((a))

FVO → First valve operation

62

In ______ compressors, the compressor and the motor work on the same shaft and are housed in the same casing.

  1. ((a))

    hermetically sealed

  2. ((b))

    common cased

  3. ((c))

    ergonomically tabulated

  4. ((d))

    hydrophobically crafted

Show Answer
Answer: ((a))

hermetically sealed

63

Refer to the given figure which shows Power (P) versus Discharge (Q) for a centrifugal pump and match the columns accordingly.

 

Column A (Curve)Column B (Type of vane)
A. Curve B1. Forward vane
B. Curve A2. Backward vane
C. Curve C3. Radial vane
  1. ((a))

    A-2; B-3; C-1

  2. ((b))

    A-1; B-2; C-3

  3. ((c))

    A-1; B-3; C-2

  4. ((d))

    A-3; B-1; C-2

Show Answer
Answer: ((a))

A-2; B-3; C-1

64

Cochran boiler is a ______ and _____ type of boiler.

  1. ((a))

    fire tube; vertical; low pressure

  2. ((b))

    fire tube; horizontal; low pressure

  3. ((c))

    water tube; horizontal; high pressure

  4. ((d))

    water tube; vertical; high pressure

Show Answer
Answer: ((a))

fire tube; vertical; low pressure

65

Which of the following fuels is LEAST/NEVER used in a boiler?

  1. ((a))

    Gas

  2. ((b))

    Mercury

  3. ((c))

    Oil

  4. ((d))

    Coal

Show Answer
Answer: ((a))

Gas

66

Identify the correct option based on the following statements.

A: Refrigerant should be affected by moisture.

B: Refrigerants should be non-toxic.

C: Refrigerants should be non-corrosive.

  1. ((a))

    Only B and C are true

  2. ((b))

    Only A and C are true

  3. ((c))

    All A, B and C are true

  4. ((d))

    Both A and B are true

Show Answer
Answer: ((a))

Only B and C are true

67

Bernoulli's equation is applied on ______.

  1. ((a))

    tachometer

  2. ((b))

    manometer

  3. ((c))

    sine bar

  4. ((d))

    orifice meter

Show Answer
Answer: ((a))

tachometer

68

Match column A with column B. 

Column A (Property)Column B (Definition)
A. Flash point1. Temperature at which vapours are given off from oil
B. Pour point2. Temperature at which lubricant is able to flow
C. Fire point3. Temperature at which oil catches fire
  1. ((a))

    A-1; B-2; C-3

  2. ((b))

    A-2; B-3; C-1

  3. ((c))

    A-2; B-1; C-3

  4. ((d))

    A-3; B-1; C-2

Show Answer
Answer: ((a))

A-1; B-2; C-3

69

Identify the correct statement with respect to hydroelectric power plant.

  1. ((a))

    Net head is the water level before tail race.

  2. ((b))

    Net head or effective head is the head available at the inlet of the turbine.

  3. ((c))

    Gross head is the effective head after the water is delivered.

  4. ((d))

    Gross head is the water level before head race.

Show Answer
Answer: ((a))

Net head is the water level before tail race.

70

Identify the correct option based on the given statements. A: Clearance ratio for a single stage reciprocating compressor is the ratio of clearance volume to swept volume. B: Clearance ratio for single stage reciprocating compressor is generally in the range of 2 to 10%.

  1. ((a))

    Both A and B are false

  2. ((b))

    A is true, but B is false

  3. ((c))

    Both A and B are true

  4. ((d))

    A is false, but B is true

Show Answer
Answer: ((a))

Both A and B are false

71

Coefficient of friction depends on ______ .

  1. ((a))

    Density of the fluid

  2. ((b))

    Surface roughness

  3. ((c))

    Colour of the fluid

  4. ((d))

    Weight of the fluid

Show Answer
Answer: ((a))

Density of the fluid

72

In a glass tube with water flowing, a liquid dye with the same specific weight is introduced. The resulting dye filament pattern is observed as shown in the figure. Identify the type of flow from the following options.

  1. ((a))

    Laminar flow

  2. ((b))

    Recoil flow

  3. ((c))

    Transient flow

  4. ((d))

    Turbulent flow

Show Answer
Answer: ((a))

Laminar flow

73

Identify the correct pair in terms of type of welding and the electrode used from the following options.

  1. ((a))

    Tungsten electrode → TIG welding

  2. ((b))

    Aluminium electrode → Laser welding

  3. ((c))

    Monel electrode → Friction stir welding

  4. ((d))

    Titanium electrode → Friction welding

Show Answer
Answer: ((a))

Tungsten electrode → TIG welding

74

_______ is a part of gas turbine fuel injector.

  1. ((a))

    Plug

  2. ((b))

    Screw gauge

  3. ((c))

    Gun

  4. ((d))

    Vaporiser

Show Answer
Answer: ((a))

Plug

75

Which of the following is NOT a type of cam when classified according to follower movement?

  1. ((a))

    Dwell-Rise-Dwell-Return-Dwell

  2. ((b))

    Rise-Rise-Rise

  3. ((c))

    Rise-Return-Rise

  4. ((d))

    Dwell-Rise-Return-Dwell

Show Answer
Answer: ((a))

Dwell-Rise-Dwell-Return-Dwell

76

Identify the flow shown in the following figure.

  1. ((a))

    Turbulent flow

  2. ((b))

    Laminar flow

  3. ((c))

    Recoil flow

  4. ((d))

    Transient flow

Show Answer
Answer: ((a))

Turbulent flow

77

Which of the following is NOT an assumption made for Euler's equation of motion?

  1. ((a))

    Frictional losses are zero

  2. ((b))

    Velocity of flow varies across the cross section

  3. ((c))

    Fluid is non-viscous

  4. ((d))

    Fluid is incompressible

Show Answer
Answer: ((a))

Frictional losses are zero

78

Which of the following is NOT a component used in steam generation?

  1. ((a))

    Evaporator

  2. ((b))

    Governor

  3. ((c))

    Boiler

  4. ((d))

    Superheater

Show Answer
Answer: ((a))

Evaporator

79

Which of the following is NOT a type of clutch?

  1. ((a))

    Cone clutch

  2. ((b))

    Dry clutch

  3. ((c))

    Cycloid clutch

  4. ((d))

    Plate clutch

Show Answer
Answer: ((a))

Cone clutch

80

Which of the following options is NOT true about viscosity?

  1. ((a))

    It is caused by friction within a fluid.

  2. ((b))

    Its unit is N-s/m^2.

  3. ((c))

    It is the same as specific gravity.

  4. ((d))

    It is defined as the fluid's resistance to deformation at a given flow.

Show Answer
Answer: ((a))

It is caused by friction within a fluid.

81

Which of the following is true for stage efficiency for the steam turbines?

  1. ((a))

    It is the product of blade efficiency and nozzle efficiency.

  2. ((b))

    It is the addition of blade efficiency and nozzle efficiency.

  3. ((c))

    It is the ratio of blade efficiency to nozzle efficiency.

  4. ((d))

    It is the square of blade efficiency.

Show Answer
Answer: ((a))

It is the product of blade efficiency and nozzle efficiency.

82

For which of the instrument out of given below, the coefficient of discharge is minimum?

  1. ((a))

    Venturimeter

  2. ((b))

    Orifice meter

  3. ((c))

    Pirani gauge

  4. ((d))

    Nozzle meter

Show Answer
Answer: ((a))

Venturimeter

83

Statements:

A: Condenser is a component of the refrigeration cycle.

B: Throttling device is not a component of the refrigeration cycle.

C: A compressor is a device of the refrigeration cycle.

  1. ((a))

    Only B and C are true

  2. ((b))

    Only A and C are true

  3. ((c))

    Both A and B are true

  4. ((d))

    All A, B and C are true

Show Answer
Answer: ((a))

Only B and C are true

84

Negative gauge pressure is also known as _______.

  1. ((a))

    barometric pressure

  2. ((b))

    atmospheric pressure

  3. ((c))

    vacuum pressure

  4. ((d))

    mercury pressure

Show Answer
Answer: ((a))

barometric pressure

85

Identify the correct statement with respect to air standard cycle assumptions.

  1. ((a))

    Water is a working fluid.

  2. ((b))

    All processes in power cycles are internally irreversible.

  3. ((c))

    Air is considered an ideal gas.

  4. ((d))

    Steam is supplied at lower temperatures.

Show Answer
Answer: ((a))

Water is a working fluid.

86

_______ is done for keeping the steam turbine speed fairly same in-spite of load.

  1. ((a))

    Positioning

  2. ((b))

    Steering

  3. ((c))

    Parting

  4. ((d))

    Governing

Show Answer
Answer: ((a))

Positioning

87

Which of the following is NOT a classification of orifices?

  1. ((a))

    Free discharging orifices

  2. ((b))

    Drowned orifices

  3. ((c))

    Submerged orifices

  4. ((d))

    Blocked orifices

Show Answer
Answer: ((a))

Free discharging orifices

88

Identify the correct pair on basis of types of components.

  1. ((a))

    Venturimeter → Volume fan

  2. ((b))

    Casing → Volute casing

  3. ((c))

    Motor → Friction blades

  4. ((d))

    Piston → Forward flow

Show Answer
Answer: ((a))

Venturimeter → Volume fan

89

An air preheater is essentially a/an ______.

  1. ((a))

    heat exchanger

  2. ((b))

    cooler

  3. ((c))

    expander

  4. ((d))

    chiller

Show Answer
Answer: ((a))

heat exchanger

90

Identify the thermodynamic device shown here.

  1. ((a))

    Refrigerator

  2. ((b))

    Condenser

  3. ((c))

    Compressor

  4. ((d))

    Boiler

Show Answer
Answer: ((a))

Refrigerator

91

Statements:

A) A refrigerant should have high boiling point.

B) A refrigerant should have high latent heat value.

C) A refrigerant should have low freezing point.

  1. ((a))

    All A,B and C

  2. ((b))

    Only A and C

  3. ((c))

    Only B and C

  4. ((d))

    Both A and B

Show Answer
Answer: ((a))

All A,B and C

92

Which of the following is NOT a type of boiler on the basis of its position?

  1. ((a))

    Prone position boiler

  2. ((b))

    Horizontal boiler

  3. ((c))

    Inclined boiler

  4. ((d))

    Vertical boiler

Show Answer
Answer: ((a))

Prone position boiler

93

The efficiency of Carnot cycle is expressed as ______.

  1. ((a))

    ratio of work done to amount of heat given

  2. ((b))

    ratio of volume compressed to amount of heat given

  3. ((c))

    ratio of work supplied to amount of work done

  4. ((d))

    ratio of work done to pressure released

Show Answer
Answer: ((a))

ratio of work done to amount of heat given

94

In ______ water flows parallel to the axis of the rotation of shaft.

  1. ((a))

    old Francis turbine

  2. ((b))

    Francis turbine

  3. ((c))

    Kaplan turbine

  4. ((d))

    Pelton wheel

Show Answer
Answer: ((a))

old Francis turbine

95

Calculate the depth of centre of pressure for the following body submerged in water.

  1. ((a))

    (2h)/3

  2. ((b))

    (4h)/3

  3. ((c))

    h/3

  4. ((d))

    (5h)/3

Show Answer
Answer: ((a))

(2h)/3

96

Assertion (A): Steam turbines operate at fairly the same speed regardless of the load due to governing.

Reason (R): Throttle governing is often done in small steam turbines.

  1. ((a))

    A is true but R is false

  2. ((b))

    Both A and R are true

  3. ((c))

    Both A and R are false

  4. ((d))

    A is false but R is true

Show Answer
Answer: ((a))

A is true but R is false

97

Which of the following turbines is correctly paired with its type?

  1. ((a))

    Mixed flow turbine → Francis turbine

  2. ((b))

    Radial flow turbine → Kaplan turbine

  3. ((c))

    Reaction turbine → Pelton wheel turbine

  4. ((d))

    Inward flow turbine → Fourneyron turbine

Show Answer
Answer: ((a))

Mixed flow turbine → Francis turbine

98

Which of the following processes DOES NOT constitute in the Carnot cycle?

  1. ((a))

    Reversible Isothermal Heat Addition

  2. ((b))

    Reversible Adiabatic Expansion

  3. ((c))

    Reversible Isobaric Condensation

  4. ((d))

    Reversible Isothermal Heat Rejection

Show Answer
Answer: ((a))

Reversible Isothermal Heat Addition

99

The SI unit of couple is:

  1. ((a))

    Kg-S

  2. ((b))

    N-S

  3. ((c))

    Pa-m

  4. ((d))

    N-m

Show Answer
Answer: ((a))

Kg-S

100

Identify the pressure indicated by C in the following figure.

  1. ((a))

    Vacuum pressure

  2. ((b))

    Absolute pressure

  3. ((c))

    Gauge pressure

  4. ((d))

    Barometric pressure

Show Answer
Answer: ((a))

Vacuum pressure

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