Mass Transfer MCQ

Q1. What is mass transfer?

Q2. Which of the following must exist for mass transfer to occur?

Q3. Fick’s first law relates mass flux to:

Q4. The unit of diffusion coefficient D is:

Q5. What does the Schmidt number represent?

Q6. Mass transfer by convection occurs when:

Q7. Which operation is an example of mass transfer?

Q8. In gas absorption, the absorbing liquid:

Q9. Which of the following is true for molecular diffusion?

Q10. The driving force for mass transfer is:

Q11. Interphase mass transfer occurs between:

Q12. The flux of a species is:

Q13. Which of the following influences mass transfer coefficient?

Q14. Which equation is used to estimate diffusion flux?

Q15. Which factor reduces the rate of mass transfer?

Q16. In liquid-liquid extraction, mass transfer happens between:

Q17. Mass transfer coefficients can be enhanced by:

Q18. Which dimensionless number is used for characterizing mass transfer?

Q19. The typical unit for mass flux is:

Q20. Diffusion is slower in:

Q21. Equipments used for gas-liquid mass transfer are:

Q22. The concentration boundary layer affects:

Q23. The term "humidification" refers to:

Q24. In distillation, mass transfer occurs between:

Q25. Mass transfer in packed beds depends on:

Q26. The main driving force in chromatography is:

Q27. Molecular weight affects:

Q28. In solvent extraction, the solute moves:

Q29. Which of these is an equipment used for gas absorption?

Q30. Drying process involves mass transfer of:

Q31. The unit operation that separates components based on differences in volatilities is:

Q32. Henry’s law relates:

Q33. The non-dimensional number relating viscous forces to inertial forces in mass transfer is:

Q34. In gas absorption, "height of transfer unit" (HTU) signifies:

Q35. Which equation describes the diffusion in stagnant gases?

Q36. Mass transfer is generally faster in:

Q37. The term "raoult’s law" is associated with:

Q38. The main controlling resistance in gas absorption is often:

Q39. The basis for design of distillation column is:

Q40. The effectiveness of a mass transfer operation is given by: