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Refrigeration and Air Conditioning

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

Zero
50
20
100

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Refrigeration and Air Conditioning
The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases,

Will be lower
Will remain unaffected
May be higher or lower depending upon the nature of non-condensable gases
Will be higher

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Refrigeration and Air Conditioning
The superheating in a refrigeration cycle

Increases C.O.P.
Does not alter C.O.P.
None of these
Decreases C.O.P.

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Refrigeration and Air Conditioning
The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The bypass factor of the heating coil is

0.67
0.4
0.376
0.6

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Refrigeration and Air Conditioning
The pressure at the outlet of a refrigerant compressor is called

Suction pressure
Back pressure
Discharge pressure
Critical pressure

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Refrigeration and Air Conditioning
Critical pressure of a liquid is the pressure

Above which liquid becomes vapour
Above which liquid will remain liquid
Above which liquid becomes solid
Above which liquid becomes gas

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MORE MCQ ON Refrigeration and Air Conditioning

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