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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
For better C.O.P of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be

Small
Anything
High
Equal

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Refrigeration and Air Conditioning
Absorption system normally uses the following refrigerant

CO2
Freon-22
Ammonia
Freon-11

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Refrigeration and Air Conditioning
Ammonia absorption refrigeration cycle requires

Very little work input
Nearly same work input as for vapour compression cycle
Maximum work input
Zero work input

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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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Refrigeration and Air Conditioning
The relative coefficient of performance is equal to

None of these
(Theoretical C.O.P.)/ (Actual C.O.P.)
(Actual C.O.P.) × (Theoretical C.O.P.)
(Actual C.O.P.) /(Theoretical C.O.P.)

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Refrigeration and Air Conditioning
In a flooded evaporator refrigerator, an accumulator at suction of compressor is used to

Detect liquid in vapour
Collect vapours
Collect liquid refrigerant and prevent it from going to compressor
Superheat the vapour

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MORE MCQ ON Refrigeration and Air Conditioning

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