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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of C.O.P. of reversed Carnot Cycle?

0.25
0.5
0.8
1.25

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Refrigeration and Air Conditioning
Ammonia is

Non-toxic
Highly toxic and inflammable
Non-inflammable
Toxic and non-inflammable

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

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

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Refrigeration and Air Conditioning
A vapour absorption refrigerator uses _________ as a refrigerant.

Freon
Ammonia
Water
Aqua-ammonia

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Refrigeration and Air Conditioning
Highest pressure encountered in a refrigeration system should be

Much below critical pressure
Near critical pressure
Critical pressure of refrigerant
Much above critical pressure

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Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m²/h
m/h
m/hK
m²/hK

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MORE MCQ ON Refrigeration and Air Conditioning

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