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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The specific humidity during humidification process

Decreases
None of these
Increases
Remains constant

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Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is___ dry bulb temperature.

Higher than
None of the listed here
Same as
Lower than

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Refrigeration and Air Conditioning
In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = Bypass factor)

P.F. - 1
1 + B.P.F.
1 - B. P.F.
1/ B.P.F.

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Refrigeration and Air Conditioning
The evolution of heat of solution takes place in ammonia absorption plant when

Weak solution mixes with strong solution
Lithium bromide mixes with ammonia
Ammonia vapour goes into solution
Ammonia vapour is driven out of solution

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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 24 hours
In 1 hour

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Refrigeration and Air Conditioning
A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be

1.33
3.33
4.33
2.33

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