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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
For large tonnage (more than 200 TR) air-conditioning applications, the compressor recommended is

Reciprocating
Centrifugal
Screw
Rotating

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Refrigeration and Air Conditioning
While designing the refrigeration system of an aircraft, the prime consideration is that the

Mass of refrigerant circulated in the system is low
System has high C.O.P.
Power per TR is low
Mass of the refrigeration equipment is low

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

R-12
Ammonia
R-11
R-22

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Refrigeration and Air Conditioning
One ton refrigeration corresponds to

80 kcal/ min
50 kcal/ min
80 kcal/ hr
50 kcal/ hr

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Refrigeration and Air Conditioning
When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be

Heated and dehumidified
Cooled and humidified
Heated and humidified
Cooled and dehumidified

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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
Decrease
May increase or decrease depending on the type of refrigerant used

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MORE MCQ ON Refrigeration and Air Conditioning

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