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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Rating of a domestic refrigerator is of the order of

10 tons
40 tons
0.1 ton
5 tons

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Refrigeration and Air Conditioning
Air refrigeration cycle is used in

Air conditioning
Domestic refrigerators
Commercial refrigerators
Gas liquefaction

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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
All of these
Dirty condenser surface
Water temperature being high

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Refrigeration and Air Conditioning
Critical pressure of a liquid is the pressure

Above which liquid becomes solid
Above which liquid will remain liquid
Above which liquid becomes gas
Above which liquid becomes vapour

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Refrigeration and Air Conditioning
In aqua ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water in

Absorber
None of these
Condenser
Evaporator

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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

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

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