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Mass Transfer

Mass Transfer
Small dia distillation column can be a

Packed column
Bubble cap
Sieve tray
Any of these

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Mass Transfer
Operating velocity in a packed tower is usually __________ the flooding velocity.

More than
Twice
Half
Equal to

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Mass Transfer
A solid material shows case hardening properties while drying. Which of the following should be controlled to control the drying process?

Humidity of inlet air
Temperature of the solid
Relative humidity of outlet air
Flow rate of inlet air

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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.

None of the listed here
Electrical resistance
Strength
Thermal conductivity

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Mass Transfer
For which of the following unit operations, Lewis number is of significance?

Humidification
Gas absorption
Binary distillation
Adsorption

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Mass Transfer
According to Chilton-Colburn analogy for mass transfer, NSt.NSc2/3 is equal to

2f
1/f
F
F/2

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