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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is

Ammonia
Carbon dioxide
Freon
Brine

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Refrigeration and Air Conditioning
The sub-cooling in a refrigeration cycle

Increases C.O.P.
Does not alter C.O.P.
None of these
Decreases C.O.P.

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Refrigeration and Air Conditioning
The difference between dry bulb temperature and wet bulb temperature, is called

Wet bulb depression
Dew point depression
Degree of saturation
Dry bulb depression

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Refrigeration and Air Conditioning
Moisture in Freon refrigeration system causes

Corrosion of whole system
Ineffective refrigeration
Freezing automatic regulating valve
High power consumption

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

More
Less
More or less depending on ambient conditions
Same

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Refrigeration and Air Conditioning
A refrigerant with the highest critical pressure is

R-22
R-12
Ammonia
R-11

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MORE MCQ ON Refrigeration and Air Conditioning

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