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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and

R-12
Carbon dioxide
Sulphur dioxide
Lithium bromide

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Refrigeration and Air Conditioning
Air refrigeration cycle is used in

Domestic refrigerators
Commercial refrigerators
Gas liquefaction
Air conditioning

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Refrigeration and Air Conditioning
If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be

1.2
5
0.2
6

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Refrigeration and Air Conditioning
In a pressure enthalpy chart, the space to the left of the saturated liquid line represents

Superheated vapour region
Sub-cooled liquid region
Wet vapour region
None of the listed here

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

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Refrigeration and Air Conditioning
The difference between dry bulb temperature and wet bulb temperature, is called

Dew point depression
Dry bulb depression
Degree of saturation
Wet bulb depression

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MORE MCQ ON Refrigeration and Air Conditioning

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