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Refrigeration and Air Conditioning

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

5
1.2
6
0.2

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

Carnot cycle
Electrolux refrigerator
Vapour absorption
Vapour compression

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Refrigeration and Air Conditioning
Where does the lowest temperature occur in a vapour compression cycle?

Expansion valve
Evaporator
Condenser
Compressor

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Refrigeration and Air Conditioning
The human body feels comfortable when the heat stored in the body is

None of these
Negative
Positive
Zero

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Refrigeration and Air Conditioning
The COP of a domestic refrigerator

Is less than 1
Is equal to 1
Depends upon the make
Is more than 1

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Refrigeration and Air Conditioning
During sensible heating of air _________ decreases.

Dry bulb temperature
Wet bulb temperature
Specific humidity
Relative humidity

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