Aeration and Agitation
MCQs with Answer
Q.2: For thorough mixing of medium and inoculum the part of fermenter useful is
A. Shaft
B. Headspace
C. Impeller
D. Sparger
Ans:- C
Q.3: In fermenter the top portion left without broth is called
A. Shaft
B. Headspace
C. Impeller
D. Sparger
Ans:- B
Q.4: The factors affecting KLa values in fermentation vessels are the following except
A. The air flow rate employed
B. The degree of agitation
C. The rheology properties of the medium
D. The presence of chelating agents
Ans:- D
Q.5: Antifoam agents collapse the foam and thus increase the ………… transfer rate of the fermentation medium
A. Carbon dioxide
B. Nitrogen
C. Oxygen
D. Hydrogen
Ans:- C
Q.6: The degree of agitation affects in fermentation process except
A. It increase the contact time for bubbles in the medium
B. It plays a vital role in the oxygen transfer rate in agitated fermenter
C. It influence coalesces of air bubbles
D. It decreases thickness of liquid film at gas-liquid interface
Ans:- C
Q.7: Medium Rheology is
A. Medium flow characteristics
B. Air flow characteristics
C. Mass flow characteristics
D. Liquid flow characteristics
Ans:- A
Q.8: Bubble column reactor cannot be used for
A. Highly viscous medium
B. Low viscous medium
C. Solid state medium
D. Liquid state medium
Ans:- A
Q.9: The dynamic method of gassing out procedure
A. Increase the supply of air to the fermentation
B. Stopping the supply of air to the fermentation
C. Changing the supply of air to the fermentation
D. None of these
Ans:- B
Q.10: The specific oxygen uptake rate increases with increase in the dissolved oxygen concentration up to a certain point is referred to as
A. Static method
B. Shaking method
C. Ccrit
D. Vmax
Ans:- C
