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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m²/hK
m/h
m²/h
m/hK

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Refrigeration and Air Conditioning
At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant

depends on other factors
increases
decreases
remains same

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

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

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Refrigeration and Air Conditioning
Mass flow ratio of NH₃ in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of

1: 9
9: 1
1: 3
1: 1

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Refrigeration and Air Conditioning
The conditioned air supplied to the room must have the capacity to take up

Room latent heat load only
Both room sensible heat and latent heat loads
Room sensible heat load only
None of the listed here

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Refrigeration and Air Conditioning
During sensible cooling,

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

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MORE MCQ ON Refrigeration and Air Conditioning

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