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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The refrigerant for a refrigerator should have

High latent heat
High sensible heat
Low latent heat
High total heat

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

8°C
5°C
22°C
14°C

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Refrigeration and Air Conditioning
The sub-cooling in a refrigeration cycle

Decreases C.O.P.
Does not alter C.O.P.
None of these
Increases C.O.P.

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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
Super-cooling
Normal cooling
None of the listed here

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Refrigeration and Air Conditioning
In order to collect liquid refrigerant and to prevent it from going to a ________, a device known as accumulator is used at the suction of compressor.

Expansion valve
Evaporator
Condenser
Compressor

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Refrigeration and Air Conditioning
The advantage of dry compression is that

It permits higher speeds to be used
All of these
It permits complete evaporation in the evaporator
It results in high volumetric and mechanical efficiency

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MORE MCQ ON Refrigeration and Air Conditioning

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