Chemical Engineering Archives | Page 353 of 357

Kinetics of a catalytic reaction can be best studied on a/an __________ reactor.

July 22, 2022 by admin

Question: Kinetics of a catalytic reaction can be best studied on a/an __________ reactor.
[A].

mixed

[B].

integral (plug flow)

[C].

differential (flow)

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Vulcanisation of rubber does not increase its

July 22, 2022 by admin

Question: Vulcanisation of rubber does not increase its
[A].

elasticity

[B].

plasticity

[C].

ductility

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

__________ has the highest melting point out of the following.

July 20, 2022 by admin

Question: __________ has the highest melting point out of the following.
[A].

Tungsten

[B].

Zirconium

[C].

Molybdenum

[D].

Tantalum

Answer: Option A

Explanation:

No answer description available for this question.

Effective diffusivity (DE) in a catalyst pellet is related to molecular diffusivity (DN) and Knudsen diffusivity (DK) as

July 20, 2022 by admin

Question: Effective diffusivity (DE) in a catalyst pellet is related to molecular diffusivity (DN) and Knudsen diffusivity (DK) as
[A].

DE = DM + DK

[B].

[C].

DE = DM . DE

[D].

DE = DN/DE

Answer: Option B

Explanation:

No answer description available for this question.

The Schmidt number which is defined as, μ/ρ D, is the ratio of the

July 20, 2022 by admin

Question: The Schmidt number which is defined as, μ/ρ D, is the ratio of the
[A].

momentum diffusivity to the mass dif-fusivity.

[B].

thermal diffusivity to the mass diffusivity.

[C].

momentum diffusivity to the thermal diffusivity.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Rayon is superior to cotton in making gauge for wound treatment, because rayon

July 20, 2022 by admin

Question: Rayon is superior to cotton in making gauge for wound treatment, because rayon
[A].

is a synthetic polymer.

[B].

does not stick to the wound unlike cotton.

[C].

can absorb over 90% of its own weight of water.

[D].

both (b) and (c).

Answer: Option B

Explanation:

No answer description available for this question.

Which of the following is the terminology used for the temperature at which the phase changes occur in a metal ?

July 20, 2022 by admin

Question: Which of the following is the terminology used for the temperature at which the phase changes occur in a metal ?
[A].

Critical temperature.

[B].

Recrystallisation temperature.

[C].

Phase transformation temperature.

[D].

Transition temperature.

Answer: Option A

Explanation:

No answer description available for this question.

Signal normally used to study non-ideal flow by stimulus response technique is __________ input.

July 20, 2022 by admin

Question: Signal normally used to study non-ideal flow by stimulus response technique is __________ input.
[A].

pulse

[B].

step

[C].

both (a) & (b)

[D].

neither (a) nor (b).

Answer: Option C

Explanation:

No answer description available for this question.

NSc/NPr is called the

July 20, 2022 by admin

Question: NSc/NPr is called the
[A].

psychrometric ratio

[B].

Lewis number

[C].

Sherwood number

[D].

Stantan number

Answer: Option B

Explanation:

No answer description available for this question.

Properties of a polymer is affected by the

July 20, 2022 by admin

Question: Properties of a polymer is affected by the
[A].

chain length.

[B].

intermolecular forces.

[C].

branching & cross-linking.

[D].

all (a), (b).

Answer: Option D

Explanation:

No answer description available for this question.