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 21 of 67

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Q201.
The mass transfer co-efficient for a solid sphere of radius 'a' dissolving in a large volume of quiescent liquid, in which D is the diffusivity of solute, is

a.

D/a

b.

D/2a

c.

proportional to √D

d.

dependent on the Reynolds number

Discuss
Answer: (d).dependent on the Reynolds number
Q202.
Pick out the wrong statement. Generally for physical adsorption, a gas of

a.

higher molecular weight is adsorbed in preference to a gas of low molecular weight.

b.

high critical temperature is adsorbed in preference to a gas of low critical temperature.

c.

low volatility is adsorbed in preference to a gas of high volatility.

d.

none of these.

Discuss
Answer: (d).none of these.
Q203.
In most of the mechanically agitated liquid-liquid extractors, baffles or horizontal compartmental plates are provided, which helps in

a.

reducing the axial mixing.

b.

increasing the rate of extraction.

c.

maintaining the concentration difference between the two phases.

d.

all 'a', 'b' & 'c'.

Discuss
Answer: (d).all 'a', 'b' & 'c'.
Q204.
Which of the following is an undesirable property in a tower packing ?

a.

Large surface per unit volume.

b.

Large free cross-section.

c.

Low weight per unit volume.

d.

Large weight of liquid retained.

Discuss
Answer: (d).Large weight of liquid retained.
Q205.
Water entrained by circulating air in cooling towers is termed as

a.

drift

b.

blow down

c.

vapor load

d.

none of these.

Discuss
Answer: (a).drift
Q206.
A 25 cm x 25 cm x 1 cm flat sheet weighing 1.2 kg initially was dried from both sides under constant drying rate conditions. It took 1500 seconds for the weight of the sheet to reduce to 1.05 kg. Another 1m x 1m x 1cm flat sheet of the same material is to be dried from one side only.Under the same constant drying rate conditions, the time required for drying (in seconds) from its initial weight of 19.2 kg to 17.6 kg is

a.

1000

b.

1500

c.

2000

d.

2500

Discuss
Answer: (a).1000
Q207.
With increase in temperature, the rate of leaching increases, because the

a.

diffusivity of solute increases.

b.

viscosity of solvent decreases.

c.

thermal conductivity of solute increases.

d.

none of these.

Discuss
Answer: (a).diffusivity of solute increases.
Q208.
Humidity chart is useful for the solution of problems concerning condensation, vaporisation and air conditioning. At a given dry bulb temperature, value of humidity obtained from the humidity chart directly, is in terms of __________ humidity.

a.

molal

b.

relative

c.

percentage

d.

none of these

Discuss
Answer: (a).molal
Q209.
The apex of an equilateral-triangular coordinate (in ternary liquid system) represents a/an

a.

pure component

b.

binary mixture

c.

ternary mixture

d.

insoluble binary system

Discuss
Answer: (a).pure component
Q210.
A slurry is to be dried to produce flaky solid. Which dryer would you recommend ?

a.

Spray dryer

b.

Drum dryer

c.

Rotary dryer

d.

Dielectric dryer

Discuss
Answer: (a).Spray dryer
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