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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of

Steel
Copper
Brass
Aluminium

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Refrigeration and Air Conditioning
The COP of a domestic refrigerator

Is more than 1
Is equal to 1
Is less than 1
Depends upon the make

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Refrigeration and Air Conditioning
The refrigerant used in small tonnage commercial machines (hermetically sealed units) is

Sulphur dioxide
Carbon dioxide
R-12
Ammonia

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Refrigeration and Air Conditioning
Allowable pressure on high pressure side or ammonia absorption system is of the order of

Slightly above atmospheric pressure
Atmospheric pressure
24 bars
56 bars

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Refrigeration and Air Conditioning
If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be

More
Less
More/less depending on rating
Same

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Refrigeration and Air Conditioning
The coefficient of performance of Heat Pump is always ___ one.

None of the listed here
Greater than
Less than
Equal to

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MORE MCQ ON Refrigeration and Air Conditioning

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