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Refrigeration and Air Conditioning

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

Discharge pressure
Critical pressure
Back pressure
Suction pressure

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Refrigeration and Air Conditioning
For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference (tm) for parallel flow is ________ that for counter flow.

None of these
Equal to
Greater than
Less than

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Refrigeration and Air Conditioning
In vapour compression cycle the condition of refrigerant is superheated vapour

After passing through the condenser
After passing through the expansion or throttle valve
Before passing through the condenser
Before entering the expansion valve

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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,

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

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Refrigeration and Air Conditioning
Superheating in a refrigeration cycle

Other factors decide C.O.P
Increases C.O.P
Decreases C.O.P
O.P remains unaltered

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Refrigeration and Air Conditioning
Refrigeration in aeroplanes usually employs the following refrigerant

CO2
Freon-11
Freon-22
Air

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MORE MCQ ON Refrigeration and Air Conditioning

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