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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Absorption system normally uses the following refrigerant

CO2
Ammonia
Freon-22
Freon-11

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Refrigeration and Air Conditioning
A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be

2 kW
1 kW
3 kW
4 kW

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Refrigeration and Air Conditioning
The evolution of heat of solution takes place in ammonia absorption plant when

Ammonia vapour goes into solution
Ammonia vapour is driven out of solution
Weak solution mixes with strong solution
Lithium bromide mixes with ammonia

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Refrigeration and Air Conditioning
One of the purposes of sub cooling the liquid refrigerant is to

Reduce compressor overheating
Reduce compressor discharge temperature
Increase cooling effect
Ensure that only liquid and not the vapour enters the expansion (throttling) valve

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Refrigeration and Air Conditioning
The humidification process, on the psychrometric chart is shown by

Inclined line
Vertical line
Horizontal line
Curved line

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Refrigeration and Air Conditioning
In a refrigerating machine, heat rejected is _________ heat absorbed.

Equal to
None of these
Less than
Greater than

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MORE MCQ ON Refrigeration and Air Conditioning

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