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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The curved lines on a psychrometric chart indicates

Relative humidity
Dew point temperature
Dry bulb temperature
Wet bulb temperature

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Refrigeration and Air Conditioning
The index which correlates the combined effects of air temperature, relative humidity and air velocity on the human body, is known as

Mean radiant temperature
Effective temperature
None of the listed here
Dew point temperature

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Refrigeration and Air Conditioning
The C.O.P. of a heat pump working on a reversed Carnot cycle is

(T₁ - T₂)/T₁
T₂/(T₂ - T₁)
T₁/(T₂ - T₁)
(T₂ - T₁)/T₁

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Refrigeration and Air Conditioning
During sensible cooling,

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

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Refrigeration and Air Conditioning
For better C.O.P of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be

Small
High
Equal
Anything

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Refrigeration and Air Conditioning
Wet bulb temperature is the temperature of air recorded by a thermometer, when

It is not affected by the moisture present in the air
None of these
The moisture present in it begins to condense
Its bulb is surrounded by a wet cloth exposed to the air

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MORE MCQ ON Refrigeration and Air Conditioning

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