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 13 of 67

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Q121.
The binary diffusivity in gases at atmospheric conditions is about

a.

10⁻⁹ cm/sec

b.

10⁻¹ cm²/sec

c.

10⁻³ sec/cm

d.

10⁻⁴ cm²/sec²

Discuss
Answer: (b).10⁻¹ cm²/sec
Q122.
Percentage saturation is __________ the relative saturation.

a.

always smaller than

b.

always greater than

c.

not related to

d.

none of these

Discuss
Answer: (a).always smaller than
Q123.
In case of a desorber (stripper), the

a.

operating line always lies above the equilibrium curve.

b.

operating line always lies below the equilibrium curve.

c.

temperature remains unaffected.

d.

temperature always increases.

Discuss
Answer: (b).operating line always lies below the equilibrium curve.
Q124.
What is the reflux ratio at total reflux ?

a.

Zero

b.

Infinity

c.

Unity

d.

Data insufficient

Discuss
Answer: (b).Infinity
Q125.
Under conditions of flooding in packed tower, the gas pressure drop

a.

decreases rapidly

b.

increases rapidly

c.

remains constant

d.

is maximum

Discuss
Answer: (d).is maximum
Q126.
For achieving rapid drying rate in a spray dryer, the diameter of the particles in the feed should be in the range of __________ microns (1 mm = 1000 microns).

a.

1-5

b.

10-60

c.

200-300

d.

> 500

Discuss
Answer: (b).10-60
Q127.
For absorbing a sparingly soluble gas in a liquid

a.

gas side mass transfer co-efficient should be increased.

b.

liquid side mass transfer co-efficient should be increased.

c.

liquid side mass transfer co-efficient should be decreased.

d.

mass transfer co-efficient must be kept constant.

Discuss
Answer: (b).liquid side mass transfer co-efficient should be increased.
Q128.
Channelling in a packed tower results from the

a.

high pressure drop

b.

maldistribution of liquid

c.

non-uniformity of packing

d.

both (b) and (c)

Discuss
Answer: (d).both (b) and (c)
Q129.
The change in enthalpy per unit weight of adsorbed gas when adsorbed on gas free or "outgassed" adsorbent to from a definite concentration of adsorbate is called its

a.

integral heat of adsorption.

b.

heat of wetting.

c.

differential heat of adsorption.

d.

heat of normal condensation.

Discuss
Answer: (a).integral heat of adsorption.
Q130.
The minimum number of theoretical plates is required for achieving a given separation in distillation column with

a.

no reflux

b.

total reflux

c.

zero reflux ratio

d.

minimum reflux ratio

Discuss
Answer: (b).total reflux
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