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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and

Carbon dioxide
R-12
Sulphur dioxide
Lithium bromide

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Refrigeration and Air Conditioning
The ratio of heat extracted in the refrigerator to the work-done on the refrigerant is called

Coefficient of performance of heat pump
Coefficient of performance of refrigeration
Refrigerating efficiency
Relative coefficient of performance

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

Screw
Centrifugal
Reciprocating
Rotating

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Refrigeration and Air Conditioning
In aircraft, air refrigeration Cycle is used because of

Low weight per tonne of refrigeration
Low temperature at high altitudes
High heat transfer rate
Higher coefficient of performance

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Refrigeration and Air Conditioning
During sensible cooling,

Wet bulb temperature increases
Specific humidity increases
Partial pressure of vapour remains constant
Relative humidity remains constant

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Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is___ dry bulb temperature.

None of the listed here
Higher than
Same as
Lower than

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MORE MCQ ON Refrigeration and Air Conditioning

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