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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m/hK
m/h
m²/h
m²/hK

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Refrigeration and Air Conditioning
During dehumidification process, _________ remains constant.

Relative humidity
Specific humidity
Wet bulb temperature
Dry bulb temperature

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Refrigeration and Air Conditioning
In vapour compression cycle using NH₃ as refrigerant, initial charge is filled at

Delivery of compressor
Low pressure side near receiver
High pressure side close to receiver
Suction of compressor

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Refrigeration and Air Conditioning
Vapour compression refrigeration is somewhat like

Carnot cycle
None of these
Reversed Carnot cycle

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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

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

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Refrigeration and Air Conditioning
In a psychrometric process, the sensible heat added is 30 kJ/s and the latent heat added is 20 kJ/s. The sensible heat factor for the process will be

1.5
0.6
0.3
0.67

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