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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The wet bulb temperature during sensible cooling of air

Decreases
Remains constant
None of these
Increases

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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)

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

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Refrigeration and Air Conditioning
In vapour compression cycle the condition off refrigerant is dry saturated vapour

Before entering the compressor
After passing through the expansion or throttle valve
Before passing through the condenser
After passing through the condenser

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Refrigeration and Air Conditioning
The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure, is called

Absolute humidity
Relative humidity
Degree of saturation
Humidity ratio

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Refrigeration and Air Conditioning
Chaperon equation is applicable for registration at

Sublimation temperature
Saturation point of liquid
Triple point
Saturation point of vapour

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Refrigeration and Air Conditioning
The change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature, influences the value of C.O.P.

Less
Unpredictable
More
Equally

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MORE MCQ ON Refrigeration and Air Conditioning

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