Explore topic-wise MCQs in Bioprocess Engineering Questions and Answers.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Bioprocess Engineering Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.

A 10,000 liter (of liquid) bioreactor contains 5 g / L of growing cells qO2 = 20 mmoles O2 / (g cells hr) DT = 2 m, DI = 1 m, (6 – blade turbine agitator) x 3 blades and CL = 1 mg O2/L. Calculate OUR.

A. 200 mmoles O2 / (g cells hr)
B. 250 mmoles O2 / (g cells hr)
C. 100 mmoles O2 / (g cells hr)
D. 150 mmoles O2 / (g cells hr)
Answer» D. 150 mmoles O2 / (g cells hr)
Discussion
2.

Which of the following does not affect KLa value?

A. Air flow rate
B. Presence of enzymes
C. Presence of antifoam agents
D. Degree of agitation
Answer» C. Presence of antifoam agents
Discussion
3.

Which of the following is not a chemical method to measure kLa?

A. Dynamic gassing out method
B. Sodium sulfite oxidation method
C. Carbon dioxide absorption method
D. Glucose oxidase method
Answer» B. Sodium sulfite oxidation method
Discussion
4.

Speed is the factor affecting the value of kLa.

A. True
B. False
Answer» B. False
Discussion
5.

“The kLa value will depend upon the design and operating conditions of the fermenter”, is this statement true or false?

A. True
B. False
Answer» B. False
Discussion
6.

Refer to Q5 and, calculate: An error is made determining the steady-state oxygen level which, instead of 78%, is taken as 70%. What is the percentage error in kLa resulting from this 10% error in \(\bar{C_{AL}}\)?

A. 50%
B. 25%
C. 75%
D. 100%
Answer» E.
Discussion
7.

What is the proper concentration unit of kLa?

A. h-1
B. ml/h
C. mmol/h
D. ml/sec
Answer» B. ml/h
Discussion
8.

What do you mean by “kLa”?

A. Volumetric mass transfer coefficient
B. Henry’s law coefficient
C. Volumetric oxygen transfer coefficient
D. Volumetric Solute transfer coefficient
Answer» D. Volumetric Solute transfer coefficient
Discussion