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Refrigeration and Air Conditioning

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

Back pressure
Discharge pressure
Critical pressure
Suction pressure

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Refrigeration and Air Conditioning
The refrigerant supplied to a compressor must be

A mixture of liquid and vapour refrigerant
Dry saturated liquid refrigerant
None of these
Superheated vapour refrigerant

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Refrigeration and Air Conditioning
The freezing point of R-12 is

-135.8°C
-107.7°C
-95.2°C
-86.6°C

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Refrigeration and Air Conditioning
During humidification process, __________ increases.

Dry bulb temperature
Wet bulb temperature
Specific humidity
Relative humidity

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

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Refrigeration and Air Conditioning
An evaporator is also known as

All of these
Chilling coil
Cooling coil
Freezing coil

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MORE MCQ ON Refrigeration and Air Conditioning

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