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Mass Transfer

Mass Transfer
Wet bulb and dry bulb temperatures becomes identical at __________ percent saturation curve.

100
None of these
78
50

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Mass Transfer
The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m²/m³)

100
1000
500
50

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Mass Transfer
Psychrometry deals with the properties of gas-vapor mixture. Humidity can be determined by the measurement of the __________ of a fibre.

Strength
None of the listed here
Electrical resistance
Thermal conductivity

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Mass Transfer
In case of an unsaturated mixture of gas and vapor, the percentage saturation is __________ its relative saturation.

Higher than
Equal to
Lower than
Either A or B, depends on the mixture composition

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Mass Transfer
Which of the following binary systems is an example of a maximum boiling azeotrope?

Water-hydrochloric acid
Water-ethyl alcohol
None of the listed here
Acetone-carbon disulphide

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Mass Transfer
With increase in pressure, the relative volatility for a binary system

Decreases
Either A or B, depends on the system
Increases
Remains same

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