CHEMICAL ENGINEERING

Question: __________ diffusion is used for separating the isotopes of methane.
[A].

Thermal

[B].

Pressure

[C].

Concentration

[D].

Force

Answer: Option A

Explanation:

No answer description available for this question.

Question: For experimental determination of mass transfer co-efficient by wetted wall tower, the mass transfer area is
[A].

calculated

[B].

unknown

[C].

known

[D].

not required

Answer: Option C

Explanation:

No answer description available for this question.

Question: In a vapor-liquid contacting equipment, the overall gas phase mass transfer co-efficient (M.T.C), KG is related to individual co-efficients (KG and KL) as
[A].

[B].

[C].

[D].

Answer: Option B

Explanation:

No answer description available for this question.

Question: Minimum possible diameter of a packed coloumn is decided mainly by the
[A].

flooding

[B].

gas viscosity

[C].

liquid density

[D].

liquid hold up

Answer: Option A

Explanation:

No answer description available for this question.

Question: Flooding in a vapor-liquid contacting equipment occurs in a tray, when the pressure drop through a tray is __________ the liquid head available in the downcomer.
[A].

less than

[B].

more than

[C].

same as

[D].

very much less

Answer: Option B

Explanation:

No answer description available for this question.

Question: Drying of refractory is normally carried out in a __________ dryer.
[A].

open pan

[B].

tray

[C].

rotary vacuum

[D].

truck/tunnel.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Out of two equilibrium curves, first one lies above the diagonal and the second lies below the diagonal in the x-y plot. It means that separation by distillation is
[A].

not possible in the second case unless vacuum is applied.

[B].

not possible in the second case unless high pressure is applied.

[C].

more readily done in the second case compared to first one.

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Calculation of mass transfer co-efficient is mostly/normally done using __________ theory.
[A].

surface renewal

[B].

film

[C].

penetration

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Langmuir equation is associated with
[A].

leaching

[B].

adsorption

[C].

steam distillation

[D].

multicomponent absorption.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Packed column distillation is limited to the column __________ metres.
[A].

height < 6

[B].

diameter < 0.6

[C].

both (a) & (b)

[D].

neither (a) nor (b).

Answer: Option C

Explanation:

No answer description available for this question.