The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will

Refrigeration and Air Conditioning
The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will

Remain unaffected

Increase

May increase or decrease depending on the type of refrigerant used

Decrease

Remain unaffected

Increase

May increase or decrease depending on the type of refrigerant used

Decrease

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Refrigeration and Air Conditioning
R-12 is generally preferred over R-22 in deep freezers since

It gives higher coefficient of performance

It has low operating pressures

All of these

It is miscible with oil over large range of temperatures

It gives higher coefficient of performance

It has low operating pressures

All of these

It is miscible with oil over large range of temperatures

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Refrigeration and Air Conditioning
The refrigerant supplied to a compressor must be

Superheated vapour refrigerant

None of these

A mixture of liquid and vapour refrigerant

Dry saturated liquid refrigerant

Superheated vapour refrigerant

None of these

A mixture of liquid and vapour refrigerant

Dry saturated liquid refrigerant

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Refrigeration and Air Conditioning
The relative coefficient of performance is equal to

(Actual C.O.P.) × (Theoretical C.O.P.)

None of these

(Actual C.O.P.) /(Theoretical C.O.P.)

(Theoretical C.O.P.)/ (Actual C.O.P.)

(Actual C.O.P.) × (Theoretical C.O.P.)

None of these

(Actual C.O.P.) /(Theoretical C.O.P.)

(Theoretical C.O.P.)/ (Actual C.O.P.)

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Refrigeration and Air Conditioning
Allowable pressure on high pressure side or ammonia absorption system is of the order of

24 bars

56 bars

Slightly above atmospheric pressure

Atmospheric pressure

24 bars

56 bars

Slightly above atmospheric pressure

Atmospheric pressure

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Refrigeration and Air Conditioning
During heating and humidification, the final relative humidity of air

None of the listed here

Can be lower or higher than that of the entering air

Is higher than that of the entering air

Is lower than that of the entering air

None of the listed here

Can be lower or higher than that of the entering air

Is higher than that of the entering air

Is lower than that of the entering air

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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will

Refrigeration and Air Conditioning R-12 is generally preferred over R-22 in deep freezers since

Refrigeration and Air Conditioning The refrigerant supplied to a compressor must be

Refrigeration and Air Conditioning The relative coefficient of performance is equal to

Refrigeration and Air Conditioning Allowable pressure on high pressure side or ammonia absorption system is of the order of

Refrigeration and Air Conditioning During heating and humidification, the final relative humidity of air

Refrigeration and Air Conditioning
The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will

Refrigeration and Air Conditioning
R-12 is generally preferred over R-22 in deep freezers since

Refrigeration and Air Conditioning
The refrigerant supplied to a compressor must be

Refrigeration and Air Conditioning
The relative coefficient of performance is equal to

Refrigeration and Air Conditioning
Allowable pressure on high pressure side or ammonia absorption system is of the order of

Refrigeration and Air Conditioning
During heating and humidification, the final relative humidity of air