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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The dry bulb temperature during sensible heating of air

Decreases
Remains constant
None of these
Increases

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Refrigeration and Air Conditioning
The pressure at the inlet of a refrigerant compressor is called

Suction pressure
Critical pressure
Discharge pressure
Back pressure

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

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

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

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

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Refrigeration and Air Conditioning
In aqua ammonia and Lithium bromide water absorption refrigeration systems, the refrigerants are respectively

Water and water
Water and lithium bromide
Ammonia and water
Ammonia and lithium bromide

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Refrigeration and Air Conditioning
In a domestic vapour compression refrigerator, the refrigerant commonly used is

R-12
Ammonia
All of these
CO?

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MORE MCQ ON Refrigeration and Air Conditioning

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