250+ TOP MCQs on Liquid- Solid Mass Transfer Correlations and Answers

Bioprocess Engineering Multiple Choice Questions on “Liquid- Solid Mass Transfer Correlations”.

1. The ratio of inertial forces to viscous forces is called as ________
A. Nusselt number
B. Schmidt number
C. Sherwood number
D. Reynolds number

Answer: D

2. Which number is analogous to Reynold’s number?
A. Nusselt number
B. Schmidt number
C. Sherwood number
D. Grashof number

Answer: D

3. Which number is defined as the ratio of momentum diffusivity to thermal diffusivity?
A. Prandtl number
B. Nusselt number
C. Reynold’s number
D. Sherwood number

Answer: A

4. Which number is analogous to Prandlt number in terms of mass transfer?
A. Sherwood number
B. Schmidt number
C. Reynolds number
D. Nusselt number

Answer: B

5. What is the unit of slip velocity?
A. m min
B. m2/ min
C. m/min
D. m/min2

Answer: C

6. Overall heat transfer coefficient is associated with?
A. Conduction and radiation
B. Conduction and convection
C. Convection and radiation
D. Radiation

Answer: B

7. Evaporation of n-propyl alcohol into carbon dioxide for the same geometrical arrangement of tube diameter (D. of 38 mm when the carbon dioxide flows at a maximum velocity (ug) of 10 m/s at 300 K and 1 atm. Properties of dilute mixtures of propyl alcohol in carbon dioxide at 300 K and 1 atm are: Molecular weight (M) = 44 gm/mole, density (ρ) = 1.8 kg/m3 , Viscosity (μ) = 1.49×10-5 kg/m.s, diffusivity (DAB. = 7.6×10-6 m2 /s and universal gas constant (R) = 8.314 J/mole.K. Estimate the Reynolds number.
Nu = 0.453Re0.568 Pr0.36, where 10 < Re (= ρug d/μ)<106 and 0.7 < Pr < 500
A. 45906.04
B. 40906.05
C. 45906.05
D. 40906.04

Answer: A

8. Refer to Q7 and Calculate the value of Schmidt number (Sc).
A. 1.02
B. 1.04
C. 1.06
D. 1.08

Answer: D

9. Refer to Q7 and Q8 and calculate the mass-transfer coefficient by using the mass and heat transfer analogy.
A. 1.661×10-05 mole/m2 .s.Pa
B. 1.663×10-05 mole/m2 .s.Pa
C. 1.665×10-05 mole/m2 .s.Pa
D. 1.669×10-05 mole/m2 .s.Pa

Answer: C

10. Advection is related to Convection.
A. True
B. False

Answer: A

11. Nusselt number is the mass transfer analog of which number?
A. Sherwood number
B. Schmidt number
C. Reynolds number
D. Nusselt number

Answer: A