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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The specific humidity during heating and humidification process.

Remains constant
Increases
None of these
Decreases

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

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

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Refrigeration and Air Conditioning
Absorption system normally uses the following refrigerant

Freon-22
Ammonia
CO2
Freon-11

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Refrigeration and Air Conditioning
The wet bulb temperature during sensible heating of air

Decreases
Remains constant
Increases
None of these

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Refrigeration and Air Conditioning
Ammonia absorption refrigeration cycle requires

Zero work input
Nearly same work input as for vapour compression cycle
Very little work input
Maximum work input

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Refrigeration and Air Conditioning
The C.O.P. of a heat pump working on a reversed Carnot cycle is

T₂/(T₂ - T₁)
(T₂ - T₁)/T₁
(T₁ - T₂)/T₁
T₁/(T₂ - T₁)

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MORE MCQ ON Refrigeration and Air Conditioning

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