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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Hydrogen is used in Electrolux refrigeration system so as to _________ the rate of evaporation of the liquid ammonia passing through the evaporator.

Equalize
None of these
Reduce
Increase

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Refrigeration and Air Conditioning
During sensible cooling,

Partial pressure of vapour remains constant
Specific humidity increases
Wet bulb temperature increases
Relative humidity remains constant

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

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

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Refrigeration and Air Conditioning
The dehumidification process, on the psychrometric chart, is shown by

Inclined line
Curved line
Horizontal line
Vertical line

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Refrigeration and Air Conditioning
As relative humidity decreases, the dew point temperature will be ___ wet bulb temperature.

Same as
None of the listed here
Higher than
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)

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

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