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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
For unsaturated air, the dew point temperature is __________ wet bulb temperature.

More than
Less than
None of these
Equal to

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Refrigeration and Air Conditioning
A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called

Moist air
Specific humidity
Saturated air
Dry air

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Refrigeration and Air Conditioning
The minimum temperature to which water can be cooled in a cooling tower is

Wet bulb temperature of air
Dry bulb temperature of air
Dew point temperature of air
Ambient air temperature

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Refrigeration and Air Conditioning
For air conditioning the operation theater in a hospital, the percentage of outside air in the air supplied is

50
100
Zero
20

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Refrigeration and Air Conditioning
Air refrigerator works on

Reversed Carnot cycle
None of these
Both (A) and (B)
Bell Coleman cycle

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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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