SSC JE 2023 Paper II Electrical Part 2

Q.21 As per the valve timing diagram of the four-stroke cycle diesel engine, typically, the fuel valve closes

1. 0°-5° after BDC
2. 15°-25° after TDC
3. 39°-50° before BDC
4. 10°-15° before TDC

Correct Option: 2

Q.22 According to laws of thermodynamics, which of the following statements is INCORRECT?

1. Fraction of heat energy can be converted into work energy.
2. Heat energy can be fully converted into work energy.
3. Work energy can be fully converted into heat energy.
4. The first law of thermodynamics is the same as the law of conservation of energy.

Correct Option: 2

SSC JE 2023 Paper II Electrical Part 2

Q23. Identify the correct options based on the assertion and reason listed below.
Assertion (A): Compounding is done in the turbine.
Reason (R): Compounding is done to prevent over speeding of turbine.

1. A is false but R is true
2. Both A and R are false
3. Both A and R are true
4. A is true but R is false

Correct Option: 3

Q.25 Based on the following two statements related to the pressure in a static fluid, select the correct option.
Statements:
A) Absolute pressures are always positive, but gauge pressures can be either positive or negative.
B) A gauge pressure of zero corresponds to a pressure that is below the local atmospheric pressure.

1. Statement A is correct, but Statement B is incorrect.
2. Statement A is incorrect, but Statement B is correct.
3. Both Statement A and Statement B are incorrect.
4. Both Statement A and Statement B are correct.

Correct Option: 1

SSC JE 2023 Paper II Electrical Part 2

Q.26 Which of the following is NOT a boiler accessory?

1. Air preheater
2. Economiser
3. Steam trap
4. Steam stop valve

Correct Option: 4

Q.27 Identify the odd one on the basis of the number of tubes.

1. Locomotive boiler
2. Lancashire boiler
3. Cornish boiler
4. Cochran boiler

Correct Option: 3

Q.28 The Rankine cycle comprises:

1. two isentropic processes and two isothermal processes
2. two isentropic processes and two constant-pressure processes
3. two isothermal processes and two constant-volume processes
4. two isentropic processes and two constant-volume processes

Correct Option: 2

SSC JE 2023 Paper II Electrical Part 2

Q.30 Which of the following is NOT a type of centrifugal pump?

1. Mixed flow pump
2. Axial flow pump
3. Linear flow pump
4. Radial flow pump

Correct Option: 3

SSC JE 2023 Paper II Electrical Part 2

Q31. What is the effect of increase in the evaporator temperature on the COP of a vapour compression refrigeration cycle?
Statement 1: The coefficient of performance (COP) of a vapour compression refrigeration cycle is directly proportional to the evaporator temperature and inversely proportional to the condenser temperature.
Statement 2: A vapour compression refrigeration cycle with a higher COP is more energy efficient.
Considering the above-mentioned question and statements, select the correct option.

1. Both Statement 1 and Statement 2 are required to answer the question.
2. Statement 1 alone is required to answer the question.
3. Neither Statement I nor Statement 2 is required to answer the question.
4. Statement 2 alone is required to answer the question.

Correct Option: 2

Q.32 Considering a grinding wheel and a regulating wheel in regard to the centreless grinding machine working principle, the is of greater diameter and has a high rotational speed, whereas the is of smaller diameter and has a
low speed.

1. grinding wheel; regulating wheel
2. grinding wheel; work rest blade
3. regulating wheel; grinding wheel
4. regulating wheel; work rest blade

Correct Option:1

Q.33 Calculate the discharge through a convergent mouthpiece of diameter 50 mm that is discharging water under a constant head of 20 meters in litre/second. (Consider g = 10 m/s2)

1. 37.25
2. 39.25
3. 41.25
4. 38.25

Correct Option: 2

SSC JE 2023 Paper II Electrical Part 2

Q.34 A cylindrical pipe of diameter 1.5 m and thickness 1.5 cm is subjected to internal fluid pressure of 1.2 N/mm2. Determine the longitudinal stress developed in the pipe.

1. 30 N/mm2
2- 60 N/mm2
3. 45 N/mm2
4-15 N/mm2

Correct Option: 1

Q.35 The operation of enlarging an already drilled hole is known as

1. boring
2. coining
3. shearing
4. punching

Correct Option: 1

Q.36 In a fluid flow, if the inertia forces are very large as compared to the viscous force, then the type of flow of fluid is called

1. either laminar flow or turbulent flow
2. turbulent flow
3. laminar flow
4. transition flow

Correct Option: 2

SSC JE 2023 Paper II Electrical Part 2

Q37. A mass of 2.4 kg of air at 150 kPa and 12°C is contained in a gas-tight, frictionless piston-cylinder device. The air is then compressed to a final pressure of 600 kPa. During this process, heat is transferred from the air in such a way that the temperature inside the cylinder remains constant. Calculate the work input during the process.

1.-11 kJ
2.-272 kJ
3. 11 kJ
4. 272 kJ

Correct Option: 2

Q.38 Calculate the magnitude of resultant of two like parallel forces of 20 N separated by a distance of 20 cm.

1. 40 N
2. 20 N
3.60 N
4. ON

Correct Option: 1

Q.39 As per the boiler regulations, every boiler must be fitted with at least

1. four
2. two
3. three
4. five

Correct Option: 2

SSC JE 2023 Paper II Electrical Part 2

Q.40 Which of the following is an INCORRECT statement?

1. Babcock-Wilcox boiler is a natural circulation boiler.
2. Locomotive boiler is natural circulation boiler.
3. Cochran boiler is a forced circulation boiler.
4. Lancashire boiler is a natural circulation boiler.

Correct Option: 3
SSC JE 2023 Paper II Electrical Part 2

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