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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Vertical lines on pressure-enthalpy chart show constant

Total heat lines
Entropy lines
Pressure lines
Temperature lines

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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.
P.F. - 1
1 - B. P.F.

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Refrigeration and Air Conditioning
In aqua ammonia and Lithium bromide water absorption refrigeration systems, the refrigerants are respectively

Ammonia and water
Water and water
Water and lithium bromide
Ammonia and lithium bromide

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Refrigeration and Air Conditioning
Moisture in Freon refrigeration system causes

Corrosion of whole system
High power consumption
Freezing automatic regulating valve
Ineffective refrigeration

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Refrigeration and Air Conditioning
Pressure of water vapour is given by

[Pv (Pb - Pd)]/ [Pd (Pb - Pv)]
μ/[1 - (1 - μ) (Ps/Pb)]
0.622 Pv/ (Pb - Pv)
None of these

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Refrigeration and Air Conditioning
One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice

In 1 hour
In 24 hours
In 1 minute
In 12 hours

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MORE MCQ ON Refrigeration and Air Conditioning

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