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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The specific humidity during humidification process

Increases
Remains constant
Decreases
None of these

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Refrigeration and Air Conditioning
During cooling and dehumidification, dry bulb temperature

Decreases
Remains constant
Increases
None of these

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

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

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Refrigeration and Air Conditioning
The wet bulb depression indicates _________ humidity of the air.

Absolute
None of these
Relative
Specific

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Refrigeration and Air Conditioning
The COP of a domestic refrigerator

Is more than 1
Is equal to 1
Is less than 1
Depends upon the make

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Refrigeration and Air Conditioning
A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be

Water temperature being high
All of these
Lack of cooling water
Dirty condenser surface

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