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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of

Brass
Steel
Aluminium
Copper

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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
2.15
1.25

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Refrigeration and Air Conditioning
The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity)

22°C DBT and 60% RH
25°C DBT and 40% RH
25°C DBT and 100% RH
20°C DBT and 80% RH

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Refrigeration and Air Conditioning
The COP of a domestic refrigerator

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

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Refrigeration and Air Conditioning
The coefficient of performance of Heat Pump is always ___ one.

Greater than
None of the listed here
Equal to
Less than

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

Horizontal line
Curved line
Inclined line
Vertical line

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MORE MCQ ON Refrigeration and Air Conditioning

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