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.Management Sciences
Category: Mass Transfer
Flights in a rotary dryer are provided to________________?
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A. Lift and shower the solids thus exposing it thoroughly to the drying action of the gas
B. Reduce the residence time of solid
C. Increase the residence time of the solid
D. None of these
Water entrained by circulating air in cooling towers is termed as____________________?
A. Drift
B. Blow down
C. Vapor load
D. None of these
With increase in temperature, the mutual solubility of two liquids_________________?
A. Increases
B. Decreases
C. Remains unchanged
D. Decreases exponentially
Which of the following parameters remains constant during chemical dehumidification ?
A. Dry bulb temperature
B. Partial pressure of vapour
C. Wet bulb temperature
D. None of these
When the ____________________ the relative humidity of air decreases, despite an increase in the absolute humidity?
A. Temperature rises
B. Pressure rises
C. Temperature falls
D. Pressure falls
The temperature to which a vapour gas mixture must be cooled (at varying humidity) to become saturated is called the ______________ temperature?
A. Dew point
B. Wet bulb
C. Dry bulb
D. None of these
In which of the following unit operations, the selectivity is an important parameter ?
A. Distillation
B. Solvent extraction
C. Absorption
D. None of these
The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if___________________?
A. NSc = 1
B. NSc = NPr = NLe
C. NPr = NLe
D. NSc = NLe
The expression, y(1 – x)/x(1 – y) is for_____________________?
A. Absorption factor
B. Relative volatility
C. Selectivity
D. Murphree efficiency
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