Online Biochemical Engineering Test - Biochemical Engineering Test - Random



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Instruction:

  • This is a FREE online test. DO NOT pay money to anyone to attend this test.
  • Total number of questions : 20.
  • Time alloted : 30 minutes.
  • Each question carry 1 mark, no negative marks.
  • DO NOT refresh the page.
  • All the best :-).


1.

Filtration leaf test results indicate that the filtration rate of a protein product is 100 dry lbs/(ft2 hr). What size production filter would be required to obtain 100 dry lbs of filter cake/hr?

A.
1.54 ft2
B.
3.08 ft2
C.
65 ft2
D.
65 lbs/ ft2.hr

Your Answer: Option (Not Answered)

Correct Answer: Option A

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2.

Micro filtration refers to the separation of suspended material such as bacteria by using a membrane with spore sizes of

A.
0.02 to 10μm
B.
1-10A°
C.
20-30μm
D.
10-200A°

Your Answer: Option (Not Answered)

Correct Answer: Option A

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3.

The maximum permissible limit (BIS) of turbidity in drinking water is

A.
5 NTU
B.
10 NTU
C.
15 NTU
D.
20 NTU

Your Answer: Option (Not Answered)

Correct Answer: Option B

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4.

BOD stands for

A.
biochemical oxygen demand
B.
british oxygen demand
C.
british oxygen depletion
D.
biological oxygen depletion

Your Answer: Option (Not Answered)

Correct Answer: Option A

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5.

Application of quaternary ammonium compounds as sanitizing agents tends to

A.
favor gram positive bacteria
B.
decrease gram positive bacteria
C.
increase the percentage of gram(-)ve rods on utensils
D.
none of the above

Your Answer: Option (Not Answered)

Correct Answer: Option C

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6.

Newtonian fluid is one in which the viscosity

A.
remains constant with time and power input
B.
increases with the level of power input
C.
decreases with the level of power input
D.
drastically increases with the level of power input

Your Answer: Option (Not Answered)

Correct Answer: Option A

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7.

A rheopectic fluid is one in which the viscosity

A.
is constant regardless of the stirrer speed or mixing time
B.
changes during mixing but returns to its original state after mixing
C.
increases with mixing time
D.
decreases with mixing time

Your Answer: Option (Not Answered)

Correct Answer: Option C

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8.

To increase the oxygen transfer rate in a shake flask culture system, which of the following (s) is/are followed?

A.
Liquid volume in the flask is reduced
B.
Stirrer speed is increased
C.
Baffled flasks are used
D.
All of the above

Your Answer: Option (Not Answered)

Correct Answer: Option D

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9.

An open system in which the growth rate is maintained by the removal and addition of media at such a rate as to maintain a constant cell density is called a

A.
manostat
B.
chemostat
C.
turbidostat
D.
culturostat

Your Answer: Option (Not Answered)

Correct Answer: Option C

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10.

Which of the following is not correct for the Monod model and the Michaelis Menten Model?

A.
The Michaelis Menten Model was derived from a curve fitting exercise
B.
The Michaelis Menten model was derived from an analysis of the mechanism of microbial growth
C.
The Monod model was derived from an analysis of the mechanism of microbial growth
D.
All of the above

Your Answer: Option (Not Answered)

Correct Answer: Option C

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11.

Bubble column reactor has

A.
large height to diameter ratio
B.
small height to diameter ratio
C.
large diameter to height ratio
D.
small diameter to height ratio

Your Answer: Option (Not Answered)

Correct Answer: Option A

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12.

Which of the following is an example of a mathematical model?

A.
Volume of cuboid = length x breadth x height
B.
The Monod Model
C.
The Michaelis Menten Equation
D.
All of the above

Your Answer: Option (Not Answered)

Correct Answer: Option D

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13.

The function(s) of the draft tube in an airlift bioreactor is

A.
to reduce bubble coalescence
B.
to improve circulation
C.
to even out shear conditions throughout the reactor
D.
all of the above

Your Answer: Option (Not Answered)

Correct Answer: Option D

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14.

Which of the following is the commonly employed adsorbents?

A.
Calcium carbonate
B.
Alumina
C.
Celluloses
D.
All of these

Your Answer: Option (Not Answered)

Correct Answer: Option D

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15.

The immobilized technique involving chemical method is

A.
covalent bond formation dependent
B.
non-covalent bond formation dependent
C.
both (a) and (b)
D.
ionic bond formation dependent

Your Answer: Option (Not Answered)

Correct Answer: Option A

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16.

A fed-batch reactor containing 1 g.l-1 of substrate in 2 litre of medium. It is fed with 1 g.l-l of substrate at the rate of 1 litre per hour. After 10 hours, the concentration of substrate in the reactor was 0.5 g.l-1 . The mass of substrate that was used by the culture in the reactor was

A.
2g
B.
6g
C.
8g
D.
12g

Your Answer: Option (Not Answered)

Correct Answer: Option B

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17.

Liquefaction of starch to dextrin is carried out by

A.
α-amylase
B.
cellulase
C.
pectinase
D.
all of these

Your Answer: Option (Not Answered)

Correct Answer: Option A

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18.

Turbulent flow range of mixing speed is obtained for

A.
Rei<10
B.
10<Rei<104
C.
Rei>104
D.
None of these

Your Answer: Option (Not Answered)

Correct Answer: Option C

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19.

During the lag phase

A.
cells just start growing
B.
cells synthesize new proteins and membrane components
C.
cells produce antibiotics to kill competing organisms
D.
cells simply grow slowly

Your Answer: Option (Not Answered)

Correct Answer: Option B

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20.

For an enzyme that displays Michaelis-Menten kinetics, the reaction velocity (as a fraction of Vmax) observed at [S] = 2 KM will be

A.
0.09
B.
0.33
C.
0.66
D.
0.91

Your Answer: Option (Not Answered)

Correct Answer: Option C

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