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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Accumulators should have adequate volume to store refrigerant charge at least

0.25
0.1
0.75
0.5

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Refrigeration and Air Conditioning
In a refrigerating machine, heat rejected is _________ heat absorbed.

Less than
Equal to
Greater than
None of these

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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

0.376
0.4
0.67
0.6

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Refrigeration and Air Conditioning
Most of the domestic refrigerators work on the following refrigeration system

Electrolux refrigerator
Vapour compression
Carnot cycle
Vapour absorption

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Refrigeration and Air Conditioning
The temperature of ammonia after compression in a vapour compression system is

50 to 70°C
20 to 50°C
70 to 110°C
None of these

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Refrigeration and Air Conditioning
The refrigerant used in small tonnage commercial machines (hermetically sealed units) is

Carbon dioxide
Sulphur dioxide
Ammonia
R-12

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MORE MCQ ON Refrigeration and Air Conditioning

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