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 4 of 67

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Q31.
Mass transfer co-efficient (K) and diffusivity (D) are related according to film theory as

a.

K ∝ D

b.

K ∝ √D

c.

K ∝ D^1.5

d.

K ∝ D²

Discuss
Answer: (a).K ∝ D
Q32.
Drying operation under vacuum is carried out to

a.

dry those materials which have very high unbound mositure content.

b.

reduce drying temperature.

c.

increase drying temperature.

d.

dry materials having high bound moisture content.

Discuss
Answer: (b).reduce drying temperature.
Q33.
Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a

a.

higher dew point.

b.

higher absolute (specific) humidity.

c.

higher relative humidity

d.

higher wet bulb temperature.

Discuss
Answer: (c).higher relative humidity
Q34.
Separation of two or more components of a liquid solution can not be achieved by

a.

fractional crystallisation

b.

liquid extraction

c.

absorption

d.

evaporation

Discuss
Answer: (c).absorption
Q35.
Stefan's law describes the mass transfer by

a.

diffusion

b.

bulk flow

c.

both 'a' & 'b'

d.

neither 'a' nor 'b'

Discuss
Answer: (c).both 'a' & 'b'
Q36.
At minimum reflux ratio for a given separation

a.

number of plates is zero.

b.

number of plates is infinity.

c.

minimum number of the theoretical plates is required.

d.

separation is most efficient.

Discuss
Answer: (b).number of plates is infinity.
Q37.
The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________

a.

1

b.

0.5

c.

10

d.

0

Discuss
Answer: (a).1
Q38.
Dew point of a gas-vapour mixture

a.

increases with temperature rise.

b.

decreases with temperature rise.

c.

decreases with decrease in pressure.

d.

increases with increase in pressure.

Discuss
Answer: (c).decreases with decrease in pressure.
Q39.
In a packed absorption tower, if the equilibrium and operating lines are both straight lines, then the ratio, HETP/HTUOG __________ the absorption factor.

a.

increases with increase in

b.

is one at unity value of

c.

both (a) and (b)

d.

neither (a) nor (b)

Discuss
Answer: (c).both (a) and (b)
Q40.
Which of the following plays an important role in problems of simultaneous heat and mass transfer ?

a.

Lewis number

b.

Schmidt number

c.

Prandtl number

d.

Sherwood number

Discuss
Answer: (a).Lewis number
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