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Refrigeration and Air Conditioning

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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Refrigeration and Air Conditioning
The desirable property of a refrigerant is

High critical temperature
Low boiling point
All of these
High latent heat of vaporisation

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Refrigeration and Air Conditioning
Moisture in Freon refrigeration system causes

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

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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

Anything
Small
High
Equal

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Refrigeration and Air Conditioning
If a gas is to be liquefied, its temperature must be

Reduced to a value below its critical temperature
Equal to critical temperature
None of these
Increased to a value above its critical temperature

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Refrigeration and Air Conditioning
The alignment circle is marked on the psychrometric chart at

26°C DBT and 60% RH
20°C DBT and 60% RH
20°C DBT and 50% RH
26°C DBT and 50% RH

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