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Refrigeration and Air Conditioning

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

Dry bulb temperature
Relative humidity
Wet bulb temperature
Dew point temperature

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Refrigeration and Air Conditioning
On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process

Takes place at constant pressure
Takes place at constant temperature
Takes place at constant entropy
Involves no change in volume

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Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m²/hK
m/hK
m²/h
m/h

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Refrigeration and Air Conditioning
For unsaturated air, the dew point temperature is __________ wet bulb temperature.

Equal to
More than
Less than
None of these

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Refrigeration and Air Conditioning
The freezing point of sulphur dioxide is

-135.8°C
-77.7°C
-75.2°C
-56.6°C

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Refrigeration and Air Conditioning
For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of

Brass
Aluminium
Copper
Steel

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MORE MCQ ON Refrigeration and Air Conditioning

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