Increased efficiency
Decreased efficiency
High operating cost
Better gas liquid contact
✅ The correct answer is option C.
Mass Transfer MCQs
In case of a desorber (stripper), the
Operating line always lies above the equilibrium curve
Operating line always lies below the equilibrium curve
Temperature remains unaffected
Temperature always increases
✅ The correct answer is option B.
Flash distillation is suitable for the separation of components
Having very close boiling points
Which form maximum boiling azeotrope
Having very wide boiling points
Which form minimum boiling azeotrope
✅ The correct answer is option C.
Diameter of raschig rings used in packed tower in industry is normally around __________ inches.
2
8
12
18
✅ The correct answer is option A.
Milk is dried usually in a __________ dryer.
Freeze
Spray
Tray
Rotary
✅ The correct answer is option B.
Make up water is required in a cooling tower to replace the water lost by
Evaporation
Drift
Blowdown and leakage
All of the above
✅ The correct answer is option D.
Fenske equation determines the
Maximum number of ideal plates
Height of the distillation column
Minimum number of theoretical plates
Optimum reflux ratio
✅ The correct answer is option C.
__________ extractor is used for the concentration of radioactive nuclear waste.
Pulsed column
Seive plate
Mixer-settler
Ballman
✅ The correct answer is option A.
The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m²/m³)
500
1200
900
800
✅ The correct answer is option A.
In case of binary distillation, increasing the reflux ratio above optimum does not result in the increase of
Area between operating line and 45° diagonal x-y diagram
Condenser and reboiler surfaces
Tower cross-section
None of these
✅ The correct answer is option A.