601. Capacity of a rotary dryer depends on its
R.p.m
Inclination with ground surface
Both A & B
Neither A nor B
✅ The correct answer is option C.
Mass Transfer MCQs
602. In case of an absorber, the operating
Line always lies above the equilibrium curve
Line always lies below the equilibrium curve
Line can be either above or below the equilibrium curve
Velocity is more than the loading velocity
✅ The correct answer is option A.
603. The equilibrium liquid composition compared to the vapor composition in case of azeotropic mixture is
More
Less
Same
Either more or less; depends on the system
✅ The correct answer is option C.
604. Flooding in a distillation column is detected by a sharp
Increase in Murphree plate efficiency
Decrease in pressure drop
Decrease in liquid hold up in the coloumn
Increase in pressure drop
✅ The correct answer is option D.
605. Most important factor to be considered in the selection of packings for absorbers is the __________ of packing.
Size
Durability
Porosity
Cost
✅ The correct answer is option C.
606. Pick out the wrong statement pertaining to the analogy between equations of heat and mass transfer operations.
Sherwood number in mass transfer is analogous to Nusselt number in heat transfer
Prandtl number in heat transfer is analogous to Schmidt number in mass transfer
Reynolds number in mass transfer is analogous to Grashoff number in heat transfer
Reynolds number remains the same in both heat and mass transfer
✅ The correct answer is option C.
607. Laboratory determination of the dif-fusivity of vapor is done by __________ method.
Wetted wall column
Gilliland’s
Winkel mann’s
Wike’s
✅ The correct answer is option C.
608. Drying of a solid involves __________ transfer.
Only heat
Only mass
Both heat and mass
None of these
✅ The correct answer is option C.
609. Channelling in a packed tower results from the
High pressure drop
Maldistribution of liquid
Non-uniformity of packing
Both B and C
✅ The correct answer is option D.
610. The relation, Sc = Pr = 1, is valid, when the mechanism of __________ ansfer is same.
Heat and mass
Mass and momentum
Heat and momentum
Heat, momentum and mass
✅ The correct answer is option A.