Chemical Engineering

Question: In azeotropic mixture, the equilibrium vapour composition is
[A].

more than liquid composition.

[B].

less than liquid composition.

[C].

same as liquid composition.

[D].

independent of pressure.

Answer: Option C

Explanation:

No answer description available for this question.

Question: For __________ drying, the effects of velocity, temperature and humidity of the gas and the thickness of the solid are the same.
[A].

unsaturated surface

[B].

constant rate

[C].

both (a) and (b)

[D].

neither (a) nor (b).

Answer: Option C

Explanation:

No answer description available for this question.

Question: On moving the feed line (q-line) from saturated liquid feed (vertical position) to saturated vapor feed (horizontal feed), if the slope of both the operating lines are to be increased, then it will result in
[A].

greater degree of separation with a fixed number of trays

[B].

increased reboiler load

[C].

increased reflux ratio

[D].

None of these.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Leaching of coarse solid lumps is also termed as
[A].

decoction

[B].

dissolution

[C].

percolation

[D].

agitation and settling

Answer: Option C

Explanation:

No answer description available for this question.

Question: Which of the following T-H diagram is valid for dehumidification operation ?
[A].

[B].

[C].

[D].

Answer: Option A

Explanation:

No answer description available for this question.

Question: A packed tower compared to a plate tower for a particular mass transfer operation
[A].

incurs smaller pressure drop.

[B].

allows installation of cooling coils.

[C].

is less costly when built in large sizes/diameters.

[D].

is more suitable, if suspended solids are present in fluid streams.

Answer: Option A

Explanation:

No answer description available for this question.

Question: If a1 and a2 are the relative volatilities when the pressure in the distillation column is 1 and 2 atm respectively. Pick out the correct statement.
[A].

a1 = a2

[B].

a1 = 2a2

[C].

a1 = 0.5 a2

[D].

none of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: Penetration model (theory) for mass transfer was enunciated by
[A].

Danckwerts

[B].

Toor and Marchello

[C].

Higbie

[D].

Kissinevskii

Answer: Option C

Explanation:

No answer description available for this question.

Question: A good solvent used for absorption should not have very high
[A].

viscosity

[B].

vapor pressure

[C].

freezing point

[D].

all (a), (b) & (c)

Answer: Option D

Explanation:

No answer description available for this question.

Question: The assumption made in Elis method in distillation is that enthalpy concentration lines of vapor and liquid are
[A].

parallel

[B].

straight

[C].

both parallel and straight

[D].

neither parallel nor straight

Answer: Option C

Explanation:

No answer description available for this question.