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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Short horizontal lines on pressure-enthalpy chart show

Constant pressure lines
Constant entropy lines
Constant temperature lines
Constant total heat lines

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Refrigeration and Air Conditioning
The capacity of a domestic refrigerator is in the range of

3 to 5 TR
5 to 7 TR
0.1 to 0.3 TR
1 to 3 TR

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Refrigeration and Air Conditioning
The horizontal and non-uniformly spaced lines on a psychrometric chart indicates

Dry bulb temperature
Dew point temperature
Wet bulb temperature
Specific humidity

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Refrigeration and Air Conditioning
During heating and dehumidification process, dry bulb temperature

Remains constant
Increases
Decreases
None of these

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Refrigeration and Air Conditioning
The coefficient of performance is the ratio of the refrigerant effect to the

Heat of compression
Work done by compressor
Enthalpy increase in compressor
All of these

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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)

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

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MORE MCQ ON Refrigeration and Air Conditioning

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