Mass Transfer

Question: H2S present in naphtha reformed gas is removed by absorbing with
[A].

ethanolamine

[B].

K2CO3

[C].

HCl

[D].

vacuum gas oil

Answer: Option A

Explanation:

No answer description available for this question.

Question: Absorption factor is defined as (where, S1 = slope of the operating line S2 = slope of the equilibrium curve)
[A].

S2/S1

[B].

S1/S2

[C].

S1 – S2

[D].

S1 x S2

Answer: Option B

Explanation:

No answer description available for this question.

Question: In case of a desorber (stripper), the
[A].

operating line always lies above the equilibrium curve.

[B].

operating line always lies below the equilibrium curve.

[C].

temperature remains unaffected.

[D].

temperature always increases.

Answer: Option B

Explanation:

No answer description available for this question.

Question: For an absorber, both equilibrium and operating line will be straight for
[A].

concentrated solution and non-isothermal operation.

[B].

dilute solution and non-isothermal operation.

[C].

dilute solution and isothermal operation.

[D].

concentrated solution and isothermal operation.

Answer: Option C

Explanation:

No answer description available for this question.

Question: In case of an absorber, the operating
[A].

line always lies above the equilibrium curve.

[B].

line always lies below the equilibrium curve.

[C].

line can be either above or below the equilibrium curve.

[D].

velocity is more than the loading velocity.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Flooding in a column results due to
[A].

high pressure drop

[B].

low pressure drop

[C].

low velocity of the liquid

[D].

high temperature

Answer: Option A

Explanation:

No answer description available for this question.

Question: Berl saddle made of carbon cannot be used for
[A].

alkalis

[B].

SO2

[C].

H2SO4

[D].

oxidising atmosphere

Answer: Option D

Explanation:

No answer description available for this question.

Question: At the same gas flow rate, the pressure drop in a packed tower being irrigated with liquid __________ that in dry packed tower.
[A].

is greater than

[B].

is lower than

[C].

is same as

[D].

cannot be predicted as data are insufficient

Answer: Option A

Explanation:

No answer description available for this question.

Question: Operating velocity in a packed tower is usually __________ the flooding velocity.
[A].

half

[B].

twice

[C].

equal to

[D].

more than

Answer: Option A

Explanation:

No answer description available for this question.

Question: Flooding results in
[A].

high tray efficiency

[B].

low tray efficiency

[C].

high gas velocity

[D].

good contact between the fluids

Answer: Option B

Explanation:

No answer description available for this question.