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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
An Electrolux refrigerator is called a ___ absorption system.

Single fluid
Three fluids
Two fluids
None of the listed here

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Refrigeration and Air Conditioning
In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = Bypass factor)

P.F. - 1
1/ B.P.F.
1 - B. P.F.
1 + B.P.F.

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Refrigeration and Air Conditioning
Which of the following refrigerants has lowest freezing point?

CO2
Freon-22
NH3
Freon-12

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Refrigeration and Air Conditioning
The superheated vapour region, in a pressure enthalpy chart, is represented by the space

To the left of saturated liquid line
None of these
Between the saturated liquid line and saturated vapour line
To the right of saturated liquid line

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

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

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Refrigeration and Air Conditioning
The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is

Smaller/bigger depending on capacity
Equal
Smaller
Bigger

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