Refrigeration and Air Conditioning
For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then

Refrigerant with lower evaporation temperature should be used
Smaller cabinet should be used
Perfectly tight vapour seal should be used
Bigger cabinet should be used

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Refrigeration and Air Conditioning
Which of the following statement is wrong?

The space between the saturated liquid line and saturated vapour line, in a pressure enthalpy chart, is wet vapour region
In a vapour compression system, the condition of refrigerant before entering the compressor is dry saturated vapour
The value of C.O.P. is always greater than one
None of the listed here

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Refrigeration and Air Conditioning
The bypass factor for a cooling coil

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
Remains unchanged with increase in velocity of air passing through it
Increases with increase in velocity of air passing through it

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