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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Air refrigeration cycle is used in

Domestic refrigerators
Gas liquefaction
Commercial refrigerators
Air conditioning

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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

1.2
0.2
6
5

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Refrigeration and Air Conditioning
A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be

All of these
Lack of cooling water
Dirty condenser surface
Water temperature being high

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Refrigeration and Air Conditioning
In vapour compression cycle, the condition of refrigerant is high pressure saturated liquid

Before entering the expansion valve
After passing through the condenser
Before passing through the condenser
After passing through the expansion or throttle valve

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Refrigeration and Air Conditioning
The coefficient of performance of Heat Pump is always ___ one.

Less than
None of the listed here
Greater than
Equal to

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Refrigeration and Air Conditioning
In air-conditioning of aeroplanes, using air as a refrigerant, the cycle used is

Reversed Brayton cycle
Reversed Carnot cycle
Reversed Joule cycle
Reversed Otto cycle

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MORE MCQ ON Refrigeration and Air Conditioning

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