Fermentation Reactors MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Fermentation Reactors, a fundamental topic in the field of Biochemical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Fermentation Reactors MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Fermentation Reactors mcq questions that explore various aspects of Fermentation Reactors problems. Each MCQ is crafted to challenge your understanding of Fermentation Reactors principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Biochemical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Fermentation Reactors MCQs are your pathway to success in mastering this essential Biochemical Engineering topic.

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Fermentation Reactors MCQs | Page 4 of 7

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Q31.
A chemostat has a liquid volume of 2 litres and is being fed at a rate of 4 litres per hour. Dilution rate for this reactor will be

a.

2 litres

b.

2 litres per hour

c.

2 h­¹

d.

4 litres per hour

Discuss
Answer: (c).2 h­¹
Q32.
Mixing per unit volume is observed to be poorest in

a.

continuous packed bed reactor

b.

continuous fluidized bed bioreactor

c.

continuous airlift bioreactor

d.

none of the above

Discuss
Answer: (a).continuous packed bed reactor
Q33.
The growth of an organism on glucose is described by the following Monod model parameters: ฮผm = 0.5 h­¹ and Ks =0.1 g.l­¹, if the concentration of glucose in the feed is 10 g.l­¹ and the dilution rate is set to 0.4 h­¹, then the steady state concentration of glucose in the effluent will be

a.

0 g.l­¹

b.

0.5 g.l­¹

c.

1.0 g.l­¹

d.

10 g.l­¹

Discuss
Answer: (b).0.5 g.l­¹
Q34.
A continuous reactor at steady state contains 0.04 g.l­¹ of biomass and 0.02 g.l­¹ of phenol. The feed contained 0.1 g.l­¹ of phenol. The biomass yield would be

a.

0.4 g.g­¹

b.

0.5 g.g­¹

c.

1.0 g.g­¹

d.

5.0 g.g­¹

Discuss
Answer: (b).0.5 g.g­¹
Q35.
A culture system with constant environmental conditions maintained through continual provision of nutrient and removal of wastes is called __________ culture system.

a.

continuous

b.

batch

c.

fed-batch

d.

semi continuous

Discuss
Answer: (a).continuous
Q36.
Unsteady state mass balance for dynamic model of continuous stirred tank reactor (CSTR) is

a.

time rate of total amount in rector = rate of addition to reactor -rate of removal + rate of formation

b.

total amount in rector = rate of addition to reactor - rate of removal + rate of formation

c.

rate of total amount in rector = rate of addition to reactor - rate of removal + rate of formation

d.

none of the above

Discuss
Answer: (a).time rate of total amount in rector = rate of addition to reactor -rate of removal + rate of formation
Q37.
A fed-batch reactor initially contains 2 litre of medium. If it was fed at 1 litre per hour, then after 10 hours, the volume of the reactor will be

a.

1 litre

b.

2 litre

c.

3 litre

d.

13 litre

Discuss
Answer: (b).2 litre
Q38.
A Bacillus sp. produces an antibiotic only during the stationary phase when grown in a batch culture. If grown in a 5 litre continuous culture, the steady state productivity of the antibiotic

a.

will increase until the culture washes out

b.

will decrease after washout

c.

will be zero

d.

will be infinite

Discuss
Answer: (c).will be zero
Q39.
In a fluidized bed reactor, the function of the disengagement zone is to

a.

reduce loss of particles from the reactor

b.

reduce the velocity of the particles near the surface of the reactor

c.

reduce foaming problems

d.

all of the above

Discuss
Answer: (d).all of the above
Q40.
Saccharomyces cerevisiae produces high biomass yields at low glucose concentrations and high dissolved oxygen concentrations. Which of the following should be followed for maximizing its biomass productivity?

a.

Batch fermenter with a high initial glucose concentration

b.

Continuous fermenter with a low initial glucose concentration

c.

Fed batch fermenter

d.

All of the above

Discuss
Answer: (c).Fed batch fermenter
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