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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The specific humidity during dehumidification process

Decreases
Remains constant
None of these
Increases

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Refrigeration and Air Conditioning
Most air cooled condensers are designed to operate with a temperature difference of

8°C
5°C
22°C
14°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)

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

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Refrigeration and Air Conditioning
In larger industrial and commercial reciprocating compression systems, refrigerant widely used is

Ammonia
Sulphur dioxide
Carbon dioxide
R-12

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Refrigeration and Air Conditioning
For unsaturated air, the dew point temperature is __________ wet bulb temperature.

Less than
Equal to
None of these
More than

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Refrigeration and Air Conditioning
A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called

High side float valve
Thermostatic expansion valve
Low side float valve
Automatic expansion valve

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MORE MCQ ON Refrigeration and Air Conditioning

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