Fluid Flow

Question: The viscosity of liquid was classified as both dilatant and rheopectic, which means that the viscosity
[A].

increased with stirring speed but decreased with mixing time

[B].

increased with stirring speed and increased with mixing time

[C].

decreased with stirring speed but increased with mixing time

[D].

decreased with stirring speed and decreased with mixing time

Answer: Option B

Explanation:

No answer description available for this question.

Question: The viscosity of the culture fluid is classified as both pseudoplastic and thixotropic which indicates that the viscosity
[A].

increases with stirring speed but decreases with mixing time

[B].

increases with stirring speed and increases with mixing time

[C].

decreases with stirring speed but increases with mixing time

[D].

decreases with stirring speed and decreases with mixing time

Answer: Option D

Explanation:

No answer description available for this question.

Question: The medium will have the highest viscosity (considering that the cells do not secrete gums) with the presence of
[A].

single celled bacteria

[B].

filamentous fungi that form pellets

[C].

filamentous fungi that grow as long poorly branched chains

[D].

yeast

Answer: Option C

Explanation:

No answer description available for this question.

Question: Which of the following compound, if added to a solution will lead to the greatest increase in viscosity?
[A].

A globular protein

[B].

Glucose

[C].

A long chain protein such as albumin

[D].

Water

Answer: Option C

Explanation:

No answer description available for this question.

Question: The viscosity of water at STP is approximately
[A].

0.005 kg.m-1.s-1

[B].

0.001 kg.m-1.s-1

[C].

0.003 kg.m-2.s-1

[D].

0.1 g.cm-1.s-1

Answer: Option B

Explanation:

No answer description available for this question.

Question: Water is a
[A].

newtonian fluid

[B].

pseudoplastic

[C].

dilatant

[D].

rheopectic

Answer: Option A

Explanation:

No answer description available for this question.

Question: The viscosity of a fluid changes with either stirrer speed or mixing time. But when mixing ceases, the viscosity returns to its original state. This fluid is best described as
[A].

newtonian

[B].

rheopectic

[C].

viscoelastic

[D].

thixotropic

Answer: Option C

Explanation:

No answer description available for this question.

Question: If the viscosity of a fluid decreases with the length of time that it is being mixed, then this fluid is
[A].

newtonian

[B].

rheopectic

[C].

viscoelastic

[D].

thixotropic

Answer: Option D

Explanation:

No answer description available for this question.

Question: If the viscosity of a fluid decreases with increasing stirrer speed, then the nature of the fluid is
[A].

newtonian

[B].

pseudoplastic

[C].

dilatant

[D].

thixotropic

Answer: Option B

Explanation:

No answer description available for this question.

Question: The SI unit for viscosity is
[A].

kg.m-1.s-1

[B].

kg.m-2.s-2

[C].

kg.m-3.s-1

[D].

kg.m-1.s-2

Answer: Option A

Explanation:

No answer description available for this question.