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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The Freon group of refrigerants are

Hydrocarbon refrigerants
Halocarbon refrigerants
Zoetrope refrigerants
Inorganic refrigerants

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Refrigeration and Air Conditioning
In chemical dehumidification process,

Dew point temperature decreases
All of these
Wet bulb temperature decreases
Dry bulb temperature increases

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Refrigeration and Air Conditioning
During cooling and dehumidification, dry bulb temperature

Decreases
None of these
Remains constant
Increases

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Refrigeration and Air Conditioning
The superheating in a refrigeration cycle

Does not alter C.O.P.
Increases C.O.P.
Decreases C.O.P.
None of these

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Refrigeration and Air Conditioning
Nusselt number (NN) is given by

NN = V²/t.cp
NN = μ cp/k
NN = ρ V l /μ
NN = hl/k

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Refrigeration and Air Conditioning
Absorption system normally uses the following refrigerant

Ammonia
Freon-11
Freon-22
CO2

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MORE MCQ ON Refrigeration and Air Conditioning

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