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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Most thermostatic expansion valves are set for a superheat of

20°C
10°C
5°C
15°C

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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: 3
9: 1
1: 9
1: 1

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Refrigeration and Air Conditioning
Air refrigeration cycle is used in

Commercial refrigerators
Gas liquefaction
Air conditioning
Domestic refrigerators

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Refrigeration and Air Conditioning
For obtaining high COP, the pressure range of compressor should be

Any value
High
Optimum
Low

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Refrigeration and Air Conditioning
The relative coefficient of performance is equal to

(Actual C.O.P.) × (Theoretical C.O.P.)
(Actual C.O.P.) /(Theoretical C.O.P.)
None of these
(Theoretical C.O.P.)/ (Actual C.O.P.)

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Refrigeration and Air Conditioning
Cooling water is required for following equipment in ammonia absorption plant

Evaporator
Absorber
Condenser
Condenser, absorber and separator (rectifier)

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MORE MCQ ON Refrigeration and Air Conditioning

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