Mass Transfer MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Mass Transfer, a fundamental topic in the field of Basic Chemical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Mass Transfer MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Mass Transfer mcq questions that explore various aspects of Mass Transfer problems. Each MCQ is crafted to challenge your understanding of Mass Transfer principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Basic Chemical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Mass Transfer MCQs are your pathway to success in mastering this essential Basic Chemical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Mass Transfer. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Mass Transfer knowledge to the test? Let's get started with our carefully curated MCQs!

Mass Transfer MCQs | Page 12 of 67

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Q111.
Corresponding to Nusselt number in heat transfer, the dimensionless group in mass transfer is the __________ number.

a.

Sherwood

b.

Schmidt

c.

Peclet

d.

Stanton

Discuss
Answer: (a).Sherwood
Q112.
If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is

a.

0.31

b.

0.107

c.

0.017

d.

0.215

Discuss
Answer: (d).0.215
Q113.
Liquid diffusivity is of the order of __________ cm² /second.

a.

0.01

b.

0.1

c.

10⁻⁵ to 10⁻⁶

d.

> 1

Discuss
Answer: (c).10⁻⁵ to 10⁻⁶
Q114.
The solvent used in liquid extraction should not have high latent heat of vaporisation, because

a.

the pressure drop and hence the pumping cost will be very high.

b.

it cannot be recovered by distillation.

c.

its recovery cost by distillation may be prohibitatively high.

d.

it will decompose while recovering by distillation.

Discuss
Answer: (c).its recovery cost by distillation may be prohibitatively high.
Q115.
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

Discuss
Answer: (a).is greater than
Q116.
Pick out the correct statement.

a.

Ponchan-Savarit method is more accurate than McCabe-Thiele method to determine the number of theoretical stages required for the separation of non-ideal binary system by distillation.

b.

A sharp decrease in pressure drop is an indication of flooding in a distillation coloumn.

c.

Solvent used in extractive distillation should be of high volatility.

d.

Flash distillation is suitable for separating components which have very close boiling temperature.

Discuss
Answer: (a).Ponchan-Savarit method is more accurate than McCabe-Thiele method to determine the number of theoretical stages required for the separation of non-ideal binary system by distillation.
Q117.
When the liquid phase and vapour phase of a binary system obeys Raoult's and Dalton's law respectively, the relative volatility is the ratio of

a.

vapour pressure of component A to that of component B.

b.

vapour pressure of component A to the total pressure.

c.

vapour pressure of component A to the partial pressure of A.

d.

partial pressure of component A to the total pressure.

Discuss
Answer: (a).vapour pressure of component A to that of component B.
Q118.
The operation involved when the soluble material is largely on the surface of an insoluble solid and is merely washed off by the solvent is called

a.

decoction

b.

percolation

c.

elutriation or elution

d.

none of these

Discuss
Answer: (c).elutriation or elution
Q119.
In the constant rate period of the rate of drying curve for batch drying,

a.

cracks develop on the surface of the solid.

b.

rate of drying decreases abruptly.

c.

surface evaporation of unbound moisture occurs.

d.

none of these.

Discuss
Answer: (c).surface evaporation of unbound moisture occurs.
Q120.
It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%).

a.

15 min

b.

51 min

c.

71 min

d.

94 min

Discuss
Answer: (c).71 min
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