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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The pressure at the outlet of a refrigerant compressor is called

Discharge pressure
Back pressure
Suction pressure
Critical pressure

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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?

0.5
0.8
0.25
1.25

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Refrigeration and Air Conditioning
In a reversed Brayton cycle, the heat is absorbed by the air during

Constant pressure expansion process
Isentropic expansion process
Isentropic compression process
Constant pressure cooling process

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Refrigeration and Air Conditioning
Under cooling in a refrigeration cycle

Decreases C.O.P
Other factors decide C.O.P
O.P remains unaltered
Increases C.O.P

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Refrigeration and Air Conditioning
In air-conditioning of aeroplanes, using air as a refrigerant, the cycle used is

Reversed Brayton cycle
Reversed Carnot cycle
Reversed Otto cycle
Reversed Joule cycle

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Refrigeration and Air Conditioning
In a spray washing system, if the temperature of water is higher than the dry bulb temperature of entering air, then the air is

Heated and dehumidified
Cooled and humidified
Cooled and dehumidified
Heated and humidified

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MORE MCQ ON Refrigeration and Air Conditioning

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