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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
During humidification process, __________ increases.

Specific humidity
Wet bulb temperature
Relative humidity
Dry bulb temperature

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Refrigeration and Air Conditioning
Most air cooled condensers are designed to operate with a temperature difference of

5°C
22°C
8°C
14°C

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Refrigeration and Air Conditioning
Which of the following refrigerant has the maximum ozone depletion potential in the stratosphere?

Fluorine
Sulphur dioxide
Ammonia
Carbon dioxide

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Refrigeration and Air Conditioning
The curved lines on a psychrometric chart indicates

Wet bulb temperature
Dry bulb temperature
Relative humidity
Dew point temperature

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Refrigeration and Air Conditioning
The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The bypass factor of the heating coil is

0.67
0.6
0.4
0.376

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Refrigeration and Air Conditioning
In vapour compression cycle the condition of refrigerant is superheated vapour

Before entering the expansion valve
Before passing through the condenser
After passing through the expansion or throttle valve
After passing through the condenser

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