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.Management Sciences
Category: Mass Transfer
The McCabe ΔL law states that the____________________?
A. Molar heats of vaporisation of components are nearly equal
B. Linear crystal growth rate depends on the degree of super-saturation
C. Linear crystal growth rate does not depend on the crystal size
D. Linear crystal growth rate depends on the crystal size
Separation of the isotopes of helium for scientific investigations is done by_____________________?
A. Reverse osmosis
B. Thermal diffusion
C. Leaching
D. Solvent extraction
Wetted wall tower experiment determines the__________________?
A. Molal diffusivity
B. Volumetric co-efficient
C. Mass transfer co-efficient
D. None of these
At a given equilibrium pressure, with increase in temperature, the concentration of adsorbed gas on solid adsorbent __________________?
A. Increases
B. Decreases
C. Remains unchanged
D. Increases exponentially
Plate efficiency in a distillation column is reduced due to the ______________________ of liquid?
A. Entrainment
B. Foaming
C. Weeping & dumping
D. All A., B. & C.
In a vapor-liquid contacting equipment, the overall gas phase mass transfer co-efficient (M.T.C), KG is related to individual co-efficients (KG and KL) as ___________________ ?
A. KG = 1/KG + m/KL
B. 1/KG = 1/KG + m/KL
C. 1/KG = 1/KL + m/KG
D. KG = 1/KL + m/KG
Dew point of a gas-vapour mixture_____________________?
A. Increases with temperature rise
B. Decreases with temperature rise
C. Decreases with decrease in pressure
D. Increases with increase in pressure
Overall efficiency of the distillation column is _____________________?
A. The ratio of number of ideal plates to actual plates
B. The ratio of number of actual plates to ideal plates
C. Same as the Murphree efficiency
D. Always more than the point efficiency
Which of the following decreases during evaporative cooling process with recirculated water supply ?
A. Wet bulb temperature
B. Relative humidity
C. Partial pressure of vapour
D. None of these
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