Chemical Engineering

Question: Antibiotics are best handled in a
[A].

Podbielniak extractor.

[B].

sieve tray contractor.

[C].

rotating disc contactor.

[D].

pulsed column extractor.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Dried finished product sampled from various parts of a __________ dryer exhibits non-uniformity in the moisture content.
[A].

rotary

[B].

tray

[C].

freeze

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Perforated plate towers are unique for solvent extraction because, they provide
[A].

higher contact area.

[B].

better contact of the phase.

[C].

repeated coalescence & redispersion of the drop phase.

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.

Question: In stripping section of continuous distillation column, the
[A].

liquid is stripped of high boiler.

[B].

liquid is enriched with high boiler.

[C].

vapour is stripped of low boiler.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: In a gas-liquid absorption coloumn, for obtaining the maximum absorption efficiency
[A].

liquid stream should be distributed uniformly.

[B].

gas stream should be distributed uniformly.

[C].

both gas as well as liquid streams should be distributed uniformly.

[D].

by passing should be completely avoided.

Answer: Option C

Explanation:

No answer description available for this question.

Question: __________ column is the most suitable for achieving the best performance for mass transfer operations involving liquid with dispersed solids.
[A].

Watted wall

[B].

Packed

[C].

Plate

[D].

Spray

Answer: Option C

Explanation:

No answer description available for this question.

Question: Measurement of the interfacial area of mass transfer is achieved easily & accurately in case of a __________ coloumn.
[A].

spray

[B].

packed

[C].

bubble cap plate

[D].

wetted wall

Answer: Option D

Explanation:

No answer description available for this question.

Question: During bottling of cold drinks (e.g. Pepsi), the main resistance to mass transfer for the absorption of carbon dioxide in water lies in the
[A].

gas film

[B].

liquid film

[C].

liquid-gas interface

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: McCabe-Thiele method
[A].

uses molal units for material and energy balance.

[B].

uses weight fractions to express liquid and vapour composition.

[C].

can use any type of units.

[D].

is more accurate than Ponchan-Savarit method.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Advantage of continuous drying over batch drying is that the
[A].

drying cost per unit weight of dried product is less.

[B].

product with more uniform moisture content is produced.

[C].

equipment size required is smaller.

[D].

all ‘a’, ‘b’ & ‘c’

Answer: Option D

Explanation:

No answer description available for this question.