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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
An important characteristic of absorption system of refrigeration is

cooling below 0°C
quiet operation
very little power consumption
noisy operation

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Refrigeration and Air Conditioning
Air refrigerator works on

Reversed Carnot cycle
Bell Coleman cycle
None of these
Both (A) and (B)

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Refrigeration and Air Conditioning
A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be

3.33
4.33
2.33
1.33

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Refrigeration and Air Conditioning
In a vapour absorption refrigeration system, the compressor of the vapour compression system is replaced by

Generator
Liquid pump
Absorber, generator and liquid pump
Absorber and generator

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Refrigeration and Air Conditioning
Mass flow ratio of NH₃ in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of

1: 9
1: 3
1: 1
9: 1

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Refrigeration and Air Conditioning
During heating and dehumidification process, dry bulb temperature

Increases
Remains constant
None of these
Decreases

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MORE MCQ ON Refrigeration and Air Conditioning

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