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Refrigeration and Air Conditioning

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

None of the listed here
Greater than
Equal to
Less than

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

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Refrigeration and Air Conditioning
The heat rejection factor (HRF) is given by

1 + C.O.P
1 - C.O.P.
1 + (1/C.O.P)
1 - (1/C.O.P)

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Refrigeration and Air Conditioning
The refrigerant supplied to a compressor must be

Dry saturated liquid refrigerant
None of these
A mixture of liquid and vapour refrigerant
Superheated vapour refrigerant

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Refrigeration and Air Conditioning
Absorption system normally uses the following refrigerant

Freon-11
Freon-22
Ammonia
CO2

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Refrigeration and Air Conditioning
The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will

May increase or decrease depending on the type of refrigerant used
Remain unaffected
Increase
Decrease

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