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 20 of 67

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Q191.
Leaching of uranium ore and gold ore is done in

a.

centrifugal extractor

b.

Pachuka tanks

c.

Bollman extractor

d.

none of these

Discuss
Answer: (b).Pachuka tanks
Q192.
Blowdown in a cooling tower

a.

means discarding a small fraction of circulating water to prevent and limit the concentration of salt and impurities.

b.

increases the scale forming tendencies of water.

c.

is undesirable.

d.

all (a), (b) & (c).

Discuss
Answer: (a).means discarding a small fraction of circulating water to prevent and limit the concentration of salt and impurities.
Q193.
During constant rate period, the rate of drying decreases with the

a.

decrease in air temperature

b.

increase in air humidity

c.

both (a) and (b)

d.

neither (a) nor (b)

Discuss
Answer: (c).both (a) and (b)
Q194.
Antibiotics are best handled in a

a.

Podbielniak extractor.

b.

sieve tray contractor.

c.

rotating disc contactor.

d.

pulsed column extractor.

Discuss
Answer: (a).Podbielniak extractor.
Q195.
The fixed cost of a distillation column at minimum reflux ratio is

a.

minimum

b.

infinite

c.

optimum

d.

none of these

Discuss
Answer: (b).infinite
Q196.
To get high tray efficiency

a.

interfacial surface between liquid and gas phase should be large.

b.

time of contact between the two phases should be less.

c.

gas velocity should be very low.

d.

liquid entrainment should be severe.

Discuss
Answer: (a).interfacial surface between liquid and gas phase should be large.
Q197.
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
Q198.
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.
Q199.
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'.
Q200.
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.
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