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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The freezing point of R-12 is

-107.7°C
-95.2°C
-135.8°C
-86.6°C

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

10°C
5°C
15°C
20°C

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Refrigeration and Air Conditioning
In S.J. unit, one ton of refrigeration is equal to

21 kJ/ min
840 kJ/ min
210 kJ/ min
420 kJ/ min

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Refrigeration and Air Conditioning
The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called

Humidity ratio
Absolute humidity
Relative humidity
Degree of saturation

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Refrigeration and Air Conditioning
In a vapour compression system, the condition of refrigerant before passing through the condenser is

Wet vapour
Superheated vapour
Saturated liquid
Dry saturated vapour

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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

Brine
Ammonia
Freon
Carbon dioxide

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MORE MCQ ON Refrigeration and Air Conditioning

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