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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The COP of a domestic refrigerator

Is equal to 1
Is less than 1
Depends upon the make
Is more than 1

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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)

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

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Refrigeration and Air Conditioning
Critical pressure of a liquid is the pressure

Above which liquid will remain liquid
Above which liquid becomes vapour
Above which liquid becomes solid
Above which liquid becomes gas

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Refrigeration and Air Conditioning
The lowest thermal diffusivity is of

Iron
Lead
Rubber
Aluminium

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Refrigeration and Air Conditioning
While designing the refrigeration system of an aircraft, the prime consideration is that the

Power per TR is low
System has high C.O.P.
Mass of the refrigeration equipment is low
Mass of refrigerant circulated in the system is low

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Refrigeration and Air Conditioning
The colour of the flame of halide torch, in case of leakage of Freon refrigerant, will change to

Red
Yellow
Orange
Bright green

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MORE MCQ ON Refrigeration and Air Conditioning

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