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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
An evaporator is also known as

All of these
Cooling coil
Chilling coil
Freezing coil

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Refrigeration and Air Conditioning
The refrigerant after condensation process is cooled below the saturation temperature before throttling. Such a process is called

Sub-cooling or under-cooling
None of the listed here
Super-cooling
Normal cooling

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Refrigeration and Air Conditioning
The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity)

22°C DBT and 60% RH
25°C DBT and 40% RH
20°C DBT and 80% RH
25°C DBT and 100% RH

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Refrigeration and Air Conditioning
The COP of a domestic refrigerator

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

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Refrigeration and Air Conditioning
Mass flow ratio of NH₃ in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of

9: 1
1: 3
1: 9
1: 1

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Refrigeration and Air Conditioning
If a gas is to be liquefied, its temperature must be

Increased to a value above its critical temperature
Reduced to a value below its critical temperature
None of these
Equal to critical temperature

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MORE MCQ ON Refrigeration and Air Conditioning

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