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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The boiling point of ________ is 10.5°C.

R-12
Sulphur dioxide
Carbon dioxide
Ammonia

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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)

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

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Refrigeration and Air Conditioning
For air conditioning the operation theater in a hospital, the percentage of outside air in the air supplied is

20
Zero
50
100

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Refrigeration and Air Conditioning
During sensible heating of air _________ decreases.

Relative humidity
Specific humidity
Wet bulb temperature
Dry bulb temperature

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Refrigeration and Air Conditioning
If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be

Less
More/less depending on rating
Same
More

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Refrigeration and Air Conditioning
The vertical and uniformly spaced lines on a psychrometric chart indicates

Dew point temperature
Wet bulb temperature
Dry bulb temperature
Specific humidity

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MORE MCQ ON Refrigeration and Air Conditioning

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