SSC JE 9 Oct 2023 PAPER I Mechanical Part 8

SSC JE 9 Oct 2023 PAPER I Mechanical Part 8

SSC JE 9 Oct 2023 PAPER I Mechanical Part 8

SSC JE 9 Oct 2023 PAPER I Mechanical Part 8

Q.76 Which of the following statements holds true, according to Kelvin Planck’s statement?

1. Perpetual motion machine of the 2nd kind is impossible.
2. Some amount of heat taken from a source must be rejected to a higher temperature sink.
3. It restricts the engine to have mechanical efficiency lesser than unity.
4. A heat engine must exchange heat from a single heat reservoir.

Correct Option: 1

Q.78 Which fluid is used to increase the rate of evaporation of the liquid ammonia passing through the evaporator in domestic Electrolux refrigeration system?

1. Ammonia
2. Hydrogen
3. Mercury
4. Water

Correct Option: 2

SSC JE 9 Oct 2023 PAPER I Mechanical Part 8

Q.81 Which of the following is NOT the part of venturimeter setup?

1. Diverging part
2. Throat
3. Float
4. Converging part

Correct Option: 3

SSC JE 9 Oct 2023 PAPER I Mechanical Part 8

Q.82 If the lower temperature fixed by the refrigeration application is high, the C.O.P. of the Carnot refrigerator will be ________.

1. very less
2. high
3. the same
4. less

Correct Option: 2

Q.84 Which among the following options has same thermal efficiency under ideal conditions (Operate within the same temperature)?

1. Carnot cycle and Otto cycle
2. Carnot cycle and Stirling cycle
3. Carnot and dual cycle
4. Carnot cycle and Brayton cycle

Correct Option: 2

SSC JE 9 Oct 2023 PAPER I Mechanical Part 8

Q.85 Which of the following is a suitable unit for measuring the capacity of refrigeration?

1. TR
2. Kw/kg
3. kg
4. kJ

Correct Option: 1

Q.86 Which of the following turbine has 50% degree of reaction?

1. Curtis turbine
2. Parson’s turbine
3. Hero’s Turbine
4. Rateau turbine

Correct Option: 2

Q.87 Which of the following is the correct item for Double Volute in centrifugal pumps?

1. Flow is separated into two equal streams by two-cut waters that are 90° apart
2. Flow is separated into two equal streams by two-cut waters that are 180° apart
3. Flow is separated into two unequal streams by two-cut waters that are 90° apart
4. Flow separation does not take place

Correct Option: 2

SSC JE 9 Oct 2023 PAPER I Mechanical Part 8

Q.89 In two-stroke petrol engine, the air Fuel mixture is prepared

1. Inside the carburetor and Inside the cylinder
2. Inside the Crank case chamber
3. Inside the Transfer Port
4. Inside the carburetor but outside the cylinder

Correct Option: 4

SSC JE 9 Oct 2023 PAPER I Mechanical Part 8

Q.91 What pressure head of kerosene of specific gravity 0.8 will be equivalent to a pressure head of 100 m of water?

1. 100 m
2. 110 m
3. 120 m
4. 125 m

Correct Option: 4

Q.92 The difference in low temperature cascade condenser temperature and high temperature cascade evaporator temperature is called ___________.

1. degree of superheat
2. degree of subcooling
3. average temperature
4. temperature overlap

Correct Option: 4

SSC JE 9 Oct 2023 PAPER I Mechanical Part 8

Q.93 Which of the following is NOT a type of steam separator?

1. Reverse current type
2. Centrifugal type
3. Impact or baffle type
4. Reciprocating type

Correct Option: 4

Q.94 The velocity of flow between two adjacent streamlines is inversely proportional to the:

1. circulation
2. specific weight
3. spacing of the streamlines
4. volume flow rate

Correct Option: 3

Q.95 If the C.O.P. of 1 TR ammonia-water absorption refrigeration plant is 0.5, then the heat supplied in the generator is ___________. (1 TR = 3.51 kw)

1. 10.5 kW
2. 3.5 kW
3. 7 kW
4. 1.5 kW

Correct Option: 3

Q.96 Which of the following is a forced circulation type of boiler?

1. Babcock & Wilcox boiler
2. LaMont boiler
3. Cochran boiler
4. Lancashire boiler

Correct Option: 2

SSC JE 9 Oct 2023 PAPER I Mechanical Part 8

Q.97 If 5 litres of a certain oil weighs 30 N, then what will be the specific weight of that oil?

1. 3000 N/m3
2. 300 N/m3
3. 6000 N/m3
4. 600 N/m3

Correct Option: 3

Q.98 On the stress-strain diagram, the material obeys Hooke’s law till:

1. elastic limit
2. point of ultimate stress
3. upper yield point
4. lower yield point

Correct Option: 1

Q.99 Which of the following point angles of a twist drill is used for general purpose work?

1. 118°
2. 128°
3. 108°
4. 138°

Correct Option: 1

SSC JE 9 Oct 2023 PAPER I Mechanical Part 8

Q.100 In which of the following cycles does heat addition NOT take place at constant volume?

1. Diesel cycle
2. Dual cycle
3. Otto cycle
4. Lenoir cycle

Correct Option: 1

SSC JE 9 Oct 2023 PAPER I Mechanical Part 8

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