Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

51) A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be

Answer is:

all of these

Explanation:

A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be
* lack of cooling water
* water temperature being high
* dirty condenser surface

52) The counter-current flow heat exchanger can transfer __________ heat than parallel flow heat exchanger.

Answer is:

more

53) The freon group of refrigerants are

Answer is:

halo-carbon refrigerants

54) For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference (tm) for parallel flow is __________ that for counter flow.

Answer is:

equal to

55) A vapour absorption refrigerator uses __________ as a refrigerant.

Answer is:

aqua-ammonia

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