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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Most thermostatic expansion valves are set for a superheat of

5°C
10°C
20°C
15°C

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Refrigeration and Air Conditioning
The operating temperature of a cold storage is -2°C. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40°C. The actual C.O.P. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. The power required to drive the plant is

7.44 kW
3.72 kW
18.6 kW
1.86 kW

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Refrigeration and Air Conditioning
The freezing point of sulphur dioxide is

-75.2°C
-56.6°C
-77.7°C
-135.8°C

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Refrigeration and Air Conditioning
In a refrigeration system, the expansion device is connected between the

Condenser and receiver
Compressor and condenser
Receiver and evaporator
Evaporator and compressor

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Refrigeration and Air Conditioning
Which of the following is not a desirable property of a refrigerant?

Large latent heat
Good electrical conductor
Low boiling point
High risibility with oil

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Refrigeration and Air Conditioning
Moisture should be removed from refrigerants to avoid

Restriction to refrigerant flow
All of these
Corrosion of steel plates
Freezing at the expansion valve

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MORE MCQ ON Refrigeration and Air Conditioning

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