351. If the amount of the steam used in steam distillation is increased, the temperature of distillation
Increases
Decreases
Remains unchanged
Depends on relative volatility
✅ The correct answer is option B.
Mass Transfer MCQs
352. With decrease in the throughput (compared with the design capacity) for a bubble cap distillation column, its efficiency
Increases
Decreases
Remains same
May increase or decrease ; depends on individual design
✅ The correct answer is option A.
353. Sticky material can be dried in a __________ dryer.
Tray
Rotary
Fluidised bed
None of these
✅ The correct answer is option A.
354. The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around
1
0.24
3.97
600
✅ The correct answer is option A.
355. Ion exchange process is similar to
Absorption
Adsorption
Extraction
Leaching
✅ The correct answer is option B.
356. Water entrained by circulating air in cooling towers is termed as
Drift
Blow down
Vapor load
None of these
✅ The correct answer is option A.
357. (NSh/NRe.NSc) is termed in mass transfer operation as the
Stanton number
Peclet number
Thermal diffusivity
Momentum diffusivity
✅ The correct answer is option A.
358. The equipment frequently used for adiabatic humidification-cooling operation with recirculating liquid is
Natural draft cooling tower
Induced draft cooling tower
Spray chamber
None of these
✅ The correct answer is option C.
359. Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the
Latent heat
Humid heat
Specific heat
Sensible heat
✅ The correct answer is option C.
360. In a solution containing 0.30 Kg mole of solute and 600 kg of solvent, the molality is
0.5
0.6
2
1
✅ The correct answer is option A.