officerpath@gmail.com Hyderabad, Pakistan
Login Register
Latest Jobs CSS 2025 PMS CCE Sindh FPSC PPSC MCQs Past Papers Current Affairs Scholarships Admissions Downloads Roll No. Slips Results
Chemical Engineering

Mass Transfer MCQs

Practice Mass Transfer MCQs for competitive exams.

Mass Transfer MCQs

Practice questions from this topic.

For experimental determination of mass transfer co-efficient by wetted wall tower, the mass transfer area is

  1. A. Calculated
  2. B. Unknown
  3. C. Known
  4. D. Not required
Report Error

Pressure drop through plate tower as compared to that through packed tower, for the same duty will be

  1. A. Less
  2. B. More
  3. C. Equal
  4. D. Either A or B; depends on the packing height
Report Error

The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around

  1. A. 1
  2. B. 0.24
  3. C. 3.97
  4. D. 600
Report Error

__________ is used as an 'entrainer' for the separation of acetic acid-water mixture by distillation.

  1. A. Furfural
  2. B. Benzol
  3. C. Butyl acetate
  4. D. Hexane
Report Error

To increase the absorption factor, (where, G = gas flow rate, S = solvent flow rate)

  1. A. Increase both 'G' and 'S'
  2. B. Decrease both 'G' and 'S'
  3. C. Increase 'S' and decrease 'G'
  4. D. Increase 'G' and decrease 'S'
Report Error

With increase in pressure, the relative volatility for a binary system

  1. A. Increases
  2. B. Decreases
  3. C. Remains same
  4. D. Either A or B, depends on the system
Report Error

If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is

  1. A. 0
  2. B. 1
  3. C. < 1
  4. D. > 1
Report Error

Danckwerts developed the __________ theory.

  1. A. Penetration
  2. B. Surface renewal
  3. C. Film
  4. D. None of these
Report Error

Unit operation involved in the prilling of urea is

  1. A. Evaporation
  2. B. Drying
  3. C. Crystallisation
  4. D. Both B and C
Report Error

Radioactive nuclear waste is treated in

  1. A. Mixer-settler extractor
  2. B. Rotating-disc contactor
  3. C. Pulsed column extractor
  4. D. Bollman extractor
Report Error

The adiabatic saturation curve for a vapour-gas mixture is

  1. A. Straight line
  2. B. Slightly concave upward
  3. C. Slightly concave downward
  4. D. None of these
Report Error

Hydrogenation of oil is carried out in a/an __________ in Vanaspati manufacturing plant.

  1. A. Agitated vessel
  2. B. Sieve tray column
  3. C. Bubble cap column
  4. D. Packed tower
Report Error