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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The leakage in a refrigeration system using Freon is detected by

All of these
Sulphur sticks
Soap and water
Halide torch

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Refrigeration and Air Conditioning
When the temperature of the surrounding is higher than the temperature of the body, then the heat loss by convection from the body to the surrounding will be

Positive
None of the listed here
Zero
Negative

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

-107.7°C
-135.8°C
-86.6°C
-95.2°C

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Refrigeration and Air Conditioning
The superheated vapour region, in a pressure enthalpy chart, is represented by the space

To the left of saturated liquid line
None of these
To the right of saturated liquid line
Between the saturated liquid line and saturated vapour line

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Refrigeration and Air Conditioning
In S.J. unit, one ton of refrigeration is equal to

840 kJ/ min
21 kJ/ min
420 kJ/ min
210 kJ/ min

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

Specific humidity
Relative humidity
Wet bulb temperature
Dry bulb temperature

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