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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The leakage in a refrigeration system using Freon is detected by

Halide torch
All of these
Soap and water
Sulphur sticks

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Refrigeration and Air Conditioning
The temperature of air recorded by a thermometer, when it is not affected by the moisture present in the air, is called

None of these
Dry bulb temperature
Wet bulb temperature
Dew point temperature

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Refrigeration and Air Conditioning
The lowest temperature during the cycle in a vapour compression system occurs after

Condensation
Compression
Evaporation
Expansion

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Refrigeration and Air Conditioning
The sensible heat factor during cooling and dehumidification process is given by (where h₁ = Enthalpy of air entering the cooling coil, h₂ = Enthalpy of air leaving the cooling coil, and hA = Enthalpy of air at the end of dehumidification process)

(hA - h2)/ (h1 - h2)
(h1 - h2)/ (hA - h2)
(h2 - hA)/ (h1 - h2)
(hA - h1)/ (h2 - h1)

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Refrigeration and Air Conditioning
A refrigerant with the highest critical pressure is

R-11
R-22
R-12
Ammonia

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Refrigeration and Air Conditioning
The desirable property of a refrigerant is

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

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MORE MCQ ON Refrigeration and Air Conditioning

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