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 16 of 67

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Q151.
Leaching of sugar from sugar beets is done by

a.

hot water

b.

hexane

c.

dilute Hโ‚‚SOโ‚„

d.

lime water

Discuss
Answer: (a).hot water
Q152.
Positive deviation from Raoult's law means a mixture whose total pressure is

a.

greater than that computed for ideality.

b.

less than that computed for ideality.

c.

less than the sum of the vapour pressure of the components.

d.

none of these.

Discuss
Answer: (a).greater than that computed for ideality.
Q153.
With increase in gas rate, the number of transfer units, NtoG, for a fixed degree of absorption by a fixed amount of solvent

a.

increases

b.

decreases

c.

decreases linearly

d.

remains unaffected

Discuss
Answer: (a).increases
Q154.
Schmidt number is given by

a.

ฮผ / ฯDแด€ส™

b.

Re.Pe

c.

Sh x Pe

d.

Re/Pe

Discuss
Answer: (a).ฮผ / ฯDแด€ส™
Q155.
The caking of crystals can be prevented by

a.

maintaining high critical humidity.

b.

maintaining low critical humidity.

c.

coating the product with inert material.

d.

both (a) and (c)

Discuss
Answer: (d).both (a) and (c)
Q156.
Prandtl number for water at 20°C is about

a.

7

b.

70

c.

0.7

d.

150.

Discuss
Answer: (a).7
Q157.
Absorption factor method is used to calculate the number of ideal stages, when

a.

operating line lies above the equilibrium line.

b.

operating line lies below the equilibrium line.

c.

both operating and equilibrium lines are parallel.

d.

pressure drop in the column is very high.

Discuss
Answer: (c).both operating and equilibrium lines are parallel.
Q158.
Flights in a rotary dryer are provided to

a.

lift and shower the solids thus exposing it thoroughly to the drying action of the gas.

b.

reduce the residence time of solid.

c.

increase the residence time of the solid.

d.

none of these.

Discuss
Answer: (a).lift and shower the solids thus exposing it thoroughly to the drying action of the gas.
Q159.
If the solubilities of different components (in a liquid-liquid extraction system) increase with rise in temperature, then the temperature above which they dissolve completely is known as the critical solution temperature (CST or consolute temperature). If solubilities increase with decrease in temperature, then CST is the temperature below which they dissolve completely. If a binary system has no critical solution temperature, it implies that

a.

the system comprises of partially mis-cible liquids.

b.

the system comprises of miscible liquids.

c.

the system comprises of an azeotrope.

d.

on heating, a vapor phase will appear ; while on cooling, a solid phase will appear.

Discuss
Answer: (d).on heating, a vapor phase will appear ; while on cooling, a solid phase will appear.
Q160.
The rate of mass transfer is not dependent upon the

a.

degree of dispersion of one fluid in the other.

b.

interfacial surface exposed between the phases.

c.

both (a) & (b).

d.

none of these.

Discuss
Answer: (d).none of these.
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