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Refrigeration and Air Conditioning

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

None of these
Remains constant
Decreases
Increases

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Refrigeration and Air Conditioning
A refrigerant compressor is used to

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

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Refrigeration and Air Conditioning
In a psychrometric chart, specific humidity (moisture content) lines are

Horizontal and non-uniformly spaced
Horizontal and uniformly spaced
Curved lines
Vertical and uniformly spaced

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Refrigeration and Air Conditioning
The power per tonne of refrigeration is

3.5/C.O.P.
None of these
3.5 × C.O.P.
O.P/3.5

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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)

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

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Refrigeration and Air Conditioning
The boiling point of ________ is 10.5°C.

R-12
Sulphur dioxide
Carbon dioxide
Ammonia

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