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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Ammonia is

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

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Refrigeration and Air Conditioning
In vapour compression cycle using NH₃ as refrigerant, initial charge is filled at

Suction of compressor
High pressure side close to receiver
Delivery of compressor
Low pressure side near receiver

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Refrigeration and Air Conditioning
The relative coefficient of performance is equal to

None of these
(Actual C.O.P.) × (Theoretical C.O.P.)
(Theoretical C.O.P.)/ (Actual C.O.P.)
(Actual C.O.P.) /(Theoretical C.O.P.)

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Refrigeration and Air Conditioning
The air cooling system mostly used in transport type aircrafts is

Simple air cooling system
Simple evaporative air cooling system
Bootstrap air cooling system
All of the listed here

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Refrigeration and Air Conditioning
Wet bulb temperature is the temperature of air recorded by a thermometer, when

Its bulb is surrounded by a wet cloth exposed to the air
None of these
It is not affected by the moisture present in the air
The moisture present in it begins to condense

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Refrigeration and Air Conditioning
The superheating in a refrigeration cycle

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

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MORE MCQ ON Refrigeration and Air Conditioning

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