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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
A refrigerant with the highest critical pressure is

R-12
R-22
R-11
Ammonia

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Refrigeration and Air Conditioning
Most air cooled condensers are designed to operate with a temperature difference of

8°C
14°C
22°C
5°C

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Refrigeration and Air Conditioning
The air cooling system mostly used in transport type aircrafts is

Bootstrap air cooling system
Simple air cooling system
All of the listed here
Simple evaporative air cooling system

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Refrigeration and Air Conditioning
Air conditioning means

Heating
All of these
Cooling
Dehumidifying

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Refrigeration and Air Conditioning
The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will

Increase
May increase or decrease depending on the type of refrigerant used
Decrease
Remain unaffected

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Refrigeration and Air Conditioning
A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of -23°C. The Carnot coefficient of performance of cycle will be

0.2
5
1.2
6

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MORE MCQ ON Refrigeration and Air Conditioning

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