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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
During humidification process, __________ increases.

Dry bulb temperature
Wet bulb temperature
Relative humidity
Specific humidity

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Refrigeration and Air Conditioning
Reducing suction pressure in refrigeration cycle

Lowers evaporation temperature
Lowers compressor capacity because vapour is lighter
All of these
Increases power required per ton of refrigeration

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

Suction pressure
Critical pressure
Discharge pressure
Back pressure

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Refrigeration and Air Conditioning
The freezing point of sulphur dioxide is

-77.7°C
-75.2°C
-56.6°C
-135.8°C

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

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Refrigeration and Air Conditioning
A refrigerant compressor is used to

Raise the pressure of the refrigerant
Raise the temperature of the refrigerant
All of these
Circulate the refrigerant through the refrigerating system

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MORE MCQ ON Refrigeration and Air Conditioning

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