Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

41. 

The sensible heat gain is due to the __________ difference between the fresh air and the air in space.

A. temperature
B. humidity

Answer: Option A

Explanation:

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42. 

During cooling and dehumidification, dry bulb temperature

A. remains constant
B. increases
C. decreases

Answer: Option C

Explanation:

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43. 

The coefficient of performance of electrolux refrigerator is the ratio of

A. heat supplied by the gas burner to the heat absorbed by the evaporator
B. heat absorbed by the evaporator to the heat supplied by the gas burner
C. heat supplied by the gas burner minus the heat absorbed by the evaporator to the heat supplied by the gas burner
D. heat absorbed by the evaporator minus the heat supplied by the gas burner to the heat absorbed by the evaporator

Answer: Option B

Explanation:

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44. 

The sulphur sticks, in case of leakage of ammonia refrigerant, gives white smoke.

A. True
B. False

Answer: Option A

Explanation:

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45. 

During gas charging in an ammonia vapour compression system, the connection is made at the compressor outlet.

A. Agree
B. Disagree

Answer: Option A

Explanation:

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