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

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

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Refrigeration and Air Conditioning
The bypass factor for a cooling coil

Remains unchanged with increase in velocity of air passing through it
Decreases with increase in velocity of air passing through it
May increase or decrease with increase in velocity of air passing through it depending upon the condition of air entering
Increases with increase in velocity of air passing through it

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