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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The bypass factor of the heating coil is

0.4
0.67
0.376
0.6

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Refrigeration and Air Conditioning
The freezing point of sulphur dioxide is

-75.2°C
-77.7°C
-56.6°C
-135.8°C

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Refrigeration and Air Conditioning
Air refrigeration cycle is used in

Commercial refrigerators
Domestic refrigerators
Gas liquefaction
Air conditioning

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Refrigeration and Air Conditioning
The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure, is called

Degree of saturation
Humidity ratio
Relative humidity
Absolute humidity

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Refrigeration and Air Conditioning
The operating pressure for refrigerating units using R-12 as a refrigerant is

30 bar
2 bar
8 bar
15 bar

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Refrigeration and Air Conditioning
Ammonia absorption refrigeration cycle requires

Very little work input
Maximum work input
Nearly same work input as for vapour compression cycle
Zero work input

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MORE MCQ ON Refrigeration and Air Conditioning

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