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Refrigeration and Air Conditioning

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

Anything
High
Small
Equal

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

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Refrigeration and Air Conditioning
The thermostatic expansion valve is used in ________ type of evaporators.

Flooded
None of these
Dry
DX coil

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Refrigeration and Air Conditioning
A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be

3.33
1.33
4.33
2.33

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Refrigeration and Air Conditioning
The COP of a domestic refrigerator

Is more than 1
Is equal to 1
Depends upon the make
Is less than 1

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MORE MCQ ON Refrigeration and Air Conditioning

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