Chemical Engineering

Question: HETP is numerically equal to HTU, only when the operating line
[A].

lies below the equilibrium line.

[B].

lies above the equilibrium line.

[C].

and equilibrium lines are parallel.

[D].

is far from the equilibrium line.

Answer: Option C

Explanation:

No answer description available for this question.

Question: For the same system, if the same liquid used in an absorber is decreased, the tower height will
[A].

increase

[B].

decrease

[C].

remain unaffected

[D].

decrease or increase ; depends on the type of liquid

Answer: Option A

Explanation:

No answer description available for this question.

Question: In an absorber, HETP does not vary with the
[A].

flow rate of liquid

[B].

flow rate of gas

[C].

type and size of packing

[D].

none of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: Ammonia present in the coke oven gas is removed by washing with
[A].

caustic solution

[B].

dilute ammoniacal liquor

[C].

dilute HCl

[D].

ethanolamine

Answer: Option B

Explanation:

No answer description available for this question.

Question: For absorbers, high pressure drop results in
[A].

increased efficiency.

[B].

decreased efficiency.

[C].

high operating cost.

[D].

better gas liquid contact.

Answer: Option C

Explanation:

No answer description available for this question.

Question: If G = insoluble gas in gas stream and L = non-volatile solvent in liquid stream, then the slope of the operating line for the absorber is
[A].

L/G

[B].

G/L

[C].

always < 1

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

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.