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Refrigeration and Air Conditioning

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

5°C
15°C
20°C
10°C

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

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

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Refrigeration and Air Conditioning
The Freon group of refrigerants are

Inorganic refrigerants
Halocarbon refrigerants
Zoetrope refrigerants
Hydrocarbon refrigerants

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Refrigeration and Air Conditioning
A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is

Carbon dioxide
Ammonia
Freon
Brine

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Refrigeration and Air Conditioning
The boiling point of ________ is 10.5°C.

Carbon dioxide
Ammonia
R-12
Sulphur dioxide

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Refrigeration and Air Conditioning
Refrigeration in aeroplanes usually employs the following refrigerant

Freon-11
Freon-22
Air
CO2

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MORE MCQ ON Refrigeration and Air Conditioning

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