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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Pressure of water vapour is given by

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

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Refrigeration and Air Conditioning
The humidification process, on the psychrometric chart is shown by

Vertical line
Inclined line
Horizontal line
Curved line

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Refrigeration and Air Conditioning
In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about

5.12
1.25
1
2.15

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Refrigeration and Air Conditioning
The alignment circle is marked on the psychrometric chart at

20°C DBT and 50% RH
20°C DBT and 60% RH
26°C DBT and 50% RH
26°C DBT and 60% RH

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Refrigeration and Air Conditioning
The freezing point of R-12 is

-86.6°C
-107.7°C
-135.8°C
-95.2°C

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Refrigeration and Air Conditioning
The evolution of heat of solution takes place in ammonia absorption plant when

Ammonia vapour is driven out of solution
Ammonia vapour goes into solution
Weak solution mixes with strong solution
Lithium bromide mixes with ammonia

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MORE MCQ ON Refrigeration and Air Conditioning

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