CHEMICAL ENGINEERING | Mass Transfer

Deairation (removal of O2) of water is done by

Byadmin August 29, 2022

Question: Deairation (removal of O2) of water is done by
[A].

rectification

[B].

absorption

[C].

ion-exchange

[D].

adsorption

Answer: Option C

Explanation:

No answer description available for this question.

CHEMICAL ENGINEERING | Fertiliser Technology

A fertiliser contains 82% N2. It could be

Question: A fertiliser contains 82% N2. It could be
[A].

urea
[B].
liquid NH3
[C].
ammonium nitrate
[D].
none of these

Answer: Option B

Explanation:

No answer description available for this question.

Read More A fertiliser contains 82% N2. It could be
CHEMICAL ENGINEERING | Heat Transfer

Evaporation of 1kg of water from a solution in a single effect evaporator requires about __________ kg of steam.

Question: Evaporation of 1kg of water from a solution in a single effect evaporator requires about __________ kg of steam.
[A].

0.4 – 0.6
[B].
1-1.3
[C].
1.8-2
[D].
2 – 2.4

Answer: Option B

Explanation:

No answer description available for this question.

Read More Evaporation of 1kg of water from a solution in a single effect evaporator requires about __________ kg of steam.
CHEMICAL ENGINEERING | Chemical Engineering Basics

Diffusion co-efficient of a metal in a solid solution depends upon its

Question: Diffusion co-efficient of a metal in a solid solution depends upon its
[A].

composition
[B].
temperature
[C].
both (a) & (b)
[D].
neither (a) nor (b)

Answer: Option C

Explanation:

No answer description available for this question.

Read More Diffusion co-efficient of a metal in a solid solution depends upon its
Mass Transfer

At the same gas flow rate, the pressure drop in a packed tower being irrigated with liquid _______________ that in dry packed tower ?

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

Read More At the same gas flow rate, the pressure drop in a packed tower being irrigated with liquid _______________ that in dry packed tower ?
CHEMICAL ENGINEERING | Chemical Engineering Basics

In a furnace with heating element temperature at 1700°C, the dominant machanism of heat transfer will be

Question: In a furnace with heating element temperature at 1700°C, the dominant machanism of heat transfer will be
[A].

conduction
[B].
radiation
[C].
natural convection
[D].
forced convection

Answer: Option B

Explanation:

No answer description available for this question.

Read More In a furnace with heating element temperature at 1700°C, the dominant machanism of heat transfer will be
CHEMICAL ENGINEERING | Heat Transfer

In a laboratory test run, the rate of drying was found to be 0.5 x 10-3 kg/m2.s, when the moisture content reduced from 0.4 to 0.1 on dry basis. The critical moisture content of the material is 0.08 on a dry basis. A tray dryer is used to dry 100 kg (dry basis) of the same material under identical conditions. The surface area of the material is 0.04 m2/kg of dry solid. The time required (in seconds) to reduce the moisture content of the solids from 0.3 to 0.2 (dry basis) is

Question: In a laboratory test run, the rate of drying was found to be 0.5 x 10-3 kg/m2.s, when the moisture content reduced from 0.4 to 0.1 on dry basis. The critical moisture content of the material is 0.08 on a dry basis. A tray dryer is used to dry 100 kg (dry basis) of the same material under identical conditions. The surface area of the material is 0.04 m2/kg of dry solid. The time required (in seconds) to reduce the moisture content of the solids from 0.3 to 0.2 (dry basis) is
[A].

2000
[B].
4000
[C].
5000
[D].
6000

Answer: Option C

Explanation:

No answer description available for this question.

Read More In a laboratory test run, the rate of drying was found to be 0.5 x 10-3 kg/m2.s, when the moisture content reduced from 0.4 to 0.1 on dry basis. The critical moisture content of the material is 0.08 on a dry basis. A tray dryer is used to dry 100 kg (dry basis) of the same material under identical conditions. The surface area of the material is 0.04 m2/kg of dry solid. The time required (in seconds) to reduce the moisture content of the solids from 0.3 to 0.2 (dry basis) is

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