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 59 of 67

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Q581.
Schimdt number and Lewis number for pure air at atmospheric conditions are respectively

a.

< 1 and ≈ 1

b.

1 and 0

c.

>1 and ≈ 1

d.

0 and ≈ 1

Discuss
Answer: (a).< 1 and ≈ 1
Q582.
Molecular diffusion is caused by the

a.

transfer of molecules from low concentration to high concentration region.

b.

thermal energy of the molecules.

c.

activation energy of the molecules.

d.

potential energy of the molecules.

Discuss
Answer: (b).thermal energy of the molecules.
Q583.
At __________ reflux, theoretical number of plates in a distillation coloumn is calculated using Fenske-Underwood equation.

a.

operating

b.

total

c.

minimum

d.

maximum permissible

Discuss
Answer: (b).total
Q584.
Separation of a mixture of two gases by absorption in the liquid solvent depends upon the difference in their

a.

viscosity

b.

density

c.

solubility

d.

relative volatility

Discuss
Answer: (c).solubility
Q585.
Components, having widely different boiling point in a binary mixture, can be separated using __________ distillation.

a.

molecular

b.

extractive

c.

steam

d.

simple

Discuss
Answer: (d).simple
Q586.
Which of the following equipments is not used in liquid-liquid extraction ?

a.

Pachuka tank

b.

Agitated vessels

c.

Centrifugal extractors

d.

Packed towers

Discuss
Answer: (a).Pachuka tank
Q587.
Pick out the wrong statement.

a.

Packed towers are preferred for vacuum operation, because the pressure drop through the packing is less and they (packings) also lessen the possibility of tower wall collapse.

b.

Packed towers are preferred over plate towers for handling corrosive and foamy liquids.

c.

Diameter of randomly packed tower is normally more than 1.2 metres.

d.

Due to uneven supply and improper distribution of liquid, problem of channeling, loading & flooding is generally encountered in packed towers.

Discuss
Answer: (c).Diameter of randomly packed tower is normally more than 1.2 metres.
Q588.
Nitrobenzene (boiling point = 210.6°C) is steam distilled at 1 atm pressure.Nitrobenzene will distill off __________ °C.

a.

at < 100

b.

at > 210.6

c.

between 100 and 210

d.

none of these

Discuss
Answer: (a).at < 100
Q589.
Pick out the wrong statement.

a.

With decrease in feed temperature, the number of plates required for binary distillation decreases for a given L/V ratio.

b.

The extraction per unit of total height for a short packed column is more effective than for a tall column, in case of liquid-liquid extraction.

c.

Natural draft cooling towers are made of ferro-concrete and its cross-section is wider at the bottom.

d.

Vanderwall adsorption is also called chemisorption.

Discuss
Answer: (d).Vanderwall adsorption is also called chemisorption.
Q590.
At what value of reflux ratio, number of theoretical plates in a distillation column is minimum ?

a.

0

b.

1

c.

∞

d.

< 1

Discuss
Answer: (c).∞
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