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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The specific humidity during heating and humidification process.

Increases
None of these
Remains constant
Decreases

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Refrigeration and Air Conditioning
One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice

In 12 hours
In 1 minute
In 1 hour
In 24 hours

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Refrigeration and Air Conditioning
The operating pressure for refrigerating units using R-12 as a refrigerant is

15 bar
2 bar
30 bar
8 bar

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

Sulphur sticks
Halide torch
Soap and water
All of these

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Refrigeration and Air Conditioning
During heating and humidification, the final relative humidity of air

Is higher than that of the entering air
None of the listed here
Can be lower or higher than that of the entering air
Is lower than that of the entering air

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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

2.15
1
5.12
1.25

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