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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The lowest thermal diffusivity is of

Lead
Iron
Rubber
Aluminium

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

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Refrigeration and Air Conditioning
A vapour absorption refrigeration system

Gives quiet operation
Gives noisy operation
Requires little power consumption
Cools below 0°C

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Refrigeration and Air Conditioning
A bootstrap air cooling system has

Four heat exchangers
Three heat exchangers
Two heat exchangers
One heat exchanger

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Refrigeration and Air Conditioning
The horizontal and non-uniformly spaced lines on a psychrometric chart indicates

Dew point temperature
Wet bulb temperature
Dry bulb temperature
Specific humidity

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Refrigeration and Air Conditioning
Moisture should be removed from refrigerants to avoid

All of these
Restriction to refrigerant flow
Freezing at the expansion valve
Corrosion of steel plates

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MORE MCQ ON Refrigeration and Air Conditioning

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