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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
A vapour absorption refrigeration system

Gives quiet operation
Cools below 0°C
Requires little power consumption
Gives noisy operation

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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

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

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Refrigeration and Air Conditioning
In case of sensible cooling of air, the coil efficiency is given by

P.F. - 1
1 - B.P.F.
1 + B.P.F.
1/ B.P.F.

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Refrigeration and Air Conditioning
The sub-cooling in a refrigeration cycle

None of these
Increases C.O.P.
Decreases C.O.P.
Does not alter C.O.P.

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Refrigeration and Air Conditioning
The alignment circle is marked on the psychrometric chart at

20°C DBT and 50% RH
20°C DBT and 60% RH
26°C DBT and 60% RH
26°C DBT and 50% RH

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Refrigeration and Air Conditioning
Presence of moisture in a refrigerant affects the working of

Expansion valve
Evaporator
Condenser
Compressor

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MORE MCQ ON Refrigeration and Air Conditioning

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