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 of a cooling coil decreases with

Increase in fin spacing and increase in number of rows
Decrease in fin spacing and decrease in number of rows
Decrease in fin spacing and increase in number of rows
Increase in fin spacing and decrease in number of rows

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