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.Management Sciences
Category: Mass Transfer
With increase in pressure, the relative volatility for a binary system_________________?
A. Increases
B. Decreases
C. Remains same
D. Either A. or B., depends on the system
_________________ is the separation technique used for desalination of sea water ?
A. Thermal diffusion
B. Reverse osmosis
C. Adsorption
D. Absorption
The ‘shanks system’ of leaching (i.e., counter-current multiple contact leaching) is used for____________________?
A. Recovery of tannis from the tree barks and woods
B. Leaching sodium nitrate from Chilean nitrate bearing rock
C. Both A. and B.
D. Neither A. nor B.
Occurrence of ‘case hardening’ during drying of a high moisture solid cake _______________ the drying rate?
A. Increases
B. Decreases
C. Does not affect
D. Exponentially increases
Can the efficiency of a plate in the distillation tower be greater than 100% ?
A. Yes
B. Normally not; but is possible if infinite number of plates are put
C. Never
D. Yes; if the reflux ratio is maximum
NSc/NPr is called the______________________?
A. Psychrometric ratio
B. Lewis number
C. Sherwood number
D. Stanton number
In case of an unsaturated mixture of gas and vapor, the percentage saturation is __________________ its relative saturation?
A. Lower than
B. Higher than
C. Equal to
D. Either A. or B., depends on the mixture composition
Molecular diffusivity of a liquid__________________?
A. Increases with temperature
B. Decreases with temperature
C. May increase or decrease with temperature
D. Is independent of temperature
Powdery materials can be guarded against caking tendency on storage by_________________?
A. Providing irregular grain size
B. Providing minimum percentage of voids
C. Having maximum possible points of contact
D. None of these
The minimum liquid rate to be used in an absorber corresponds to an operating line_______________________?
A. Of slope = 1
B. Of slope = 0.1
C. Tangential to the equilibrium curve
D. None of these
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