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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The COP of a domestic refrigerator

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

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Refrigeration and Air Conditioning
The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called

Relative humidity
Absolute humidity
Degree of saturation
Humidity ratio

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Refrigeration and Air Conditioning
In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about

5.12
2.15
1
1.25

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Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m/hK
m²/h
m²/hK
m/h

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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

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

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Refrigeration and Air Conditioning
The cooling system used for supersonic aircrafts and rockets is

Simple air cooling system
Reduced ambient air cooling system
Regenerative air cooling system
Bootstrap air cooling system

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MORE MCQ ON Refrigeration and Air Conditioning

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