Chemical Engineering Archives | Page 354 of 357

The factor of safety for brittle materials (having elongation < 5%) is based on the __________ stress.

July 20, 2022 by admin

Question: The factor of safety for brittle materials (having elongation < 5%) is based on the __________ stress.
[A].

yield

[B].

proof

[C].

ultimate

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

The dew point of an unsaturated gas-vapor mixture does not depend upon the __________ of the mixture.

July 20, 2022 by admin

Question: The dew point of an unsaturated gas-vapor mixture does not depend upon the __________ of the mixture.
[A].

composition

[B].

temperature

[C].

total pressure

[D].

all (a), (b) and (c)

Answer: Option B

Explanation:

No answer description available for this question.

In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is

July 20, 2022 by admin

Question: In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is
[A].

terylene

[B].

polybutadiene

[C].

PVC

[D].

polypropylene

Answer: Option A

Explanation:

No answer description available for this question.

Pick out the correct statement.

July 20, 2022 by admin

Question: Pick out the correct statement.
[A].

Ponchan-Savarit method is more accurate than McCabe-Thiele method to determine the number of theoretical stages required for the separation of non-ideal binary system by distillation.

[B].

A sharp decrease in pressure drop is an indication of flooding in a distillation coloumn.

[C].

Solvent used in extractive distillation should be of high volatility.

[D].

Flash distillation is suitable for separating components which have very close boiling temperature.

Answer: Option A

Explanation:

No answer description available for this question.

Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is

July 20, 2022 by admin

Question: Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is
[A].

nylon-66

[B].

teflon

[C].

polyester

[D].

bakelite

Answer: Option B

Explanation:

No answer description available for this question.

__________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical.

July 20, 2022 by admin

Question: __________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical.
[A].

Mach

[B].

Reynolds

[C].

Froude

[D].

Weber

Answer: Option C

Explanation:

No answer description available for this question.

In condensation polymerisation as compared to addition polymerisation

July 20, 2022 by admin

Question: In condensation polymerisation as compared to addition polymerisation
[A].

the monomers are unsaturated compounds.

[B].

no co-product is lost.

[C].

the monomers contain two functional groups.

[D].

generally only one monomer is involved

Answer: Option C

Explanation:

No answer description available for this question.

The hydraulic radius of a circular pipe of diameter ‘d’ flowing full is

July 20, 2022 by admin

Question: The hydraulic radius of a circular pipe of diameter ‘d’ flowing full is
[A].

d/4

[B].

d/2

[C].

2d/3

[D].

d/3

Answer: Option A

Explanation:

No answer description available for this question.

The importance of diffusion in a catalyst are increased by

July 20, 2022 by admin

Question: The importance of diffusion in a catalyst are increased by
[A].

large catalyst particle size.

[B].

an active surface of the catalyst.

[C].

small pore diameter.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Molality is defined as the number of gm moles of solute per __________ of solvent.

July 20, 2022 by admin

Question: Molality is defined as the number of gm moles of solute per __________ of solvent.
[A].

litre

[B].

[C].

[D].

Answer: Option C

Explanation:

No answer description available for this question.