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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be

3.33
1.33
2.33
4.33

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Refrigeration and Air Conditioning
The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is

Less
More or less depending on ambient conditions
More
Same

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Refrigeration and Air Conditioning
Chaperon equation is a relation between

Temperature, pressure and enthalpy
Temperature, pressure, specific volume and enthalpy
Temperature and enthalpy
Specific volume and enthalpy

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Refrigeration and Air Conditioning
Pick up the wrong statement. A refrigerant should have

Higher critical temperature
Tow specific heat of liquid
High boiling point
High latent heat of vaporisation

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Refrigeration and Air Conditioning
The heat rejection factor (HRF) is given by

1 + C.O.P
1 + (1/C.O.P)
1 - C.O.P.
1 - (1/C.O.P)

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Refrigeration and Air Conditioning
In mechanical refrigeration system, the refrigerant has the maximum temperature

Between compressor and condenser
In evaporator
Before expansion valve
Between condenser and evaporator

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MORE MCQ ON Refrigeration and Air Conditioning

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