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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Air refrigeration cycle is used in

Domestic refrigerators
Gas liquefaction
Air conditioning
Commercial refrigerators

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

Sulphur dioxide
Ammonia
R-12
Carbon dioxide

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Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is___ dry bulb temperature.

Higher than
Same as
None of the listed here
Lower than

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Refrigeration and Air Conditioning
A standard ice point temperature corresponds to the temperature of

Ice at 4°C
Solid and dry ice
Mixture of ice and water under equilibrium conditions
Water at 0°C

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Refrigeration and Air Conditioning
Ammonia is

Non-toxic
Non-inflammable
Toxic and non-inflammable
Highly toxic and inflammable

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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)

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

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MORE MCQ ON Refrigeration and Air Conditioning

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