SSC JE 2023 Paper II Electrical Part 3

Q.41 In the gas welding process, a neutral flame contains______and_____in equal proportions.

1. oxygen; propane
2. oxygen; propylene
3. oxygen; acetylene
4. oxygen; natural gas

Correct Option: 3

Q42 A single-stage, reciprocating air compressor takes in 1.4 kg of air per minute at 1 bar and 17°C and delivers it at 6 bar. Assuming that the compression process follows the law pp.35 = constant, calculate the indicated power input to the
compressor.

1. 1.57 kw
2. 3.42 kW
3. 0.26 kW
4.4.43 kW

Correct Option: 4

Q.44 An efficient lubrication system ensures that

1. the engine runs with greater friction
2. the engine runs with greater noise
3. the engine runs roughly
4. the engine runs without noise

Correct Option: 4

SSC JE 2023 Paper II Electrical Part 3

Q.46 Based on the two statements given below, select the correct option.
Statements:
A) The state of a simple compressible system is completely specified by three independent, intensive properties.
B) A system is called a simple compressible system in the absence of an electrical, magnetic, gravitational, motion or surface tension effect.

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

Correct Option:1

SSC JE 2023 Paper II Electrical Part 3

Q.48 Which of the following statements is INCORRECT regarding a thermodynamic system?

1. An isolated system is a closed system that does not interact in any way with its surroundings.
2. Everything including the system is known as surroundings.
3. The surface separating the system and its surroundings is known as boundary.
4. The system boundary may be movable or fixed.

Correct Option: 2

SSC JE 2023 Paper II Electrical Part 3

Based on the following two statements related to the actual vapour power cycle and the ideal Rankine cycle, select the correct option.

Q.49 Statements:

A) Steam leaves the boiler at a somewhat lower pressure in the actual cycle than the ideal one.
B) Water must be pumped to a sufficiently higher pressure in the actual cycle than the ideal one.
1. Both Statement A and Statement B are incorrect.
2. Statement A is correct, but Statement B is incorrect.
3. Both Statement A and Statement B are correct.
4. Statement A is incorrect, but Statement B is correct.

Correct Option: 3

Q.50 Free air of volumetric flow rate 30 m3/min is compressed from 101.3 kPa to 2.23 bar in a Roots blower. Determine the indicated power required.

1. 60.85 kW
2. 44.83 kW
3. 65.72 kW
4. 36.51 kW

Correct Option: 1

Q51. A draft tube has the inlet diameter of 1 m and the outlet diameter of 2 m. The absolute pressure at the inlet of the draft tube is 0.4 bar. The outlet of the draft tube is exposed to atmosphere. The flow rate of water through the draft tube is 1600 litres per second. Then, the vertical distance between the inlet and the outlet is approximately

1. 0.06 m
2. 60 m
3. 6 m
4. 0.6 m

Correct Option: 3

SSC JE 2023 Paper II Electrical Part 3

Q.52 The basic function of an expansion valve in a refrigerator is to ______the|_______refrigerant from the_______pressure. to the_____pressure

1. condense; gaseous; condenser; evaporator
2. condense; gaseous; evaporator; condenser
3. expand; liquid; evaporator; condenser
4. expand; liquid; condenser; evaporator

Correct Option: 4

Q53. Which of the following points correctly pairs boiler mountings with primary functions of boilers?
(i) Manhole – Melts and releases steam if the water level in the boiler drops too down,
(ii) Feed check valve – Prevents backflow of water into the feed pump,
3. (iii) Safety valve- Releases excess steam from the boiler to prevent overpressure,
4. (iv) Fusible plug – Allows the boiler to be drained for inspection and maintenance1. (ii)
2 (ii)
3. (iii)
4. (iv)

Correct Option: 1

Q.54 Which of following is a defect that would never occur in shielded metal arc welding?

1. Porosity
2. Slag inclusion
3. Tungsten inclusion
4. Crack

Correct Option: 3

SSC JE 2023 Paper II Electrical Part 3

Q.55 The specific gravity of a fluid is 0.8. What is its specific weight at 4°C?

1. 7848 N/m3
2 12,250 N/m3
3. 9800 N/m3
4- 14,000 N/m3

Correct Option: 1

Q.56 The sum of datum head and pressure head from Bernoulli’s equation is known as

1. piezometric head
2. atmospheric head
3. datum head
4. manometric head

Correct Option:1

Q.57 The absolute pressure is equal to:

1. vacuum pressure + gauge pressure
2. gauge pressure + atmospheric pressure + vacuum pressure
3. gauge pressure + atmospheric pressure
4. gauge pressure – atmospheric pressure

Correct Option: 3

SSC JE 2023 Paper II Electrical Part 3

Q.59 Which of the following statements is INCORRECT regarding heat and work?

1. Heat and work are boundary phenomena.
2. Systems possess heat and work, but not energy.
3. Heat and work are associated with a process; not with a state.
4. Heat and work are path functions.

Correct Option: 2

Q.60 In the P-V diagram for a pure substance, the point at which the saturated liquid line and the saturated vapour line meet is called

1. normal point
2. saturation point
3. critical point
4. triple point

Correct Option: 3

SSC JE 2023 Paper II Electrical Part 3

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