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.
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'
Q32.
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.
Q33.
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
Q34.
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.
Q35.
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)
Q36.
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
Q37.
In case of an absorber, the operating

a.

line always lies above the equilibrium curve.

b.

line always lies below the equilibrium curve.

c.

line can be either above or below the equilibrium curve.

d.

velocity is more than the loading velocity.

Discuss
Answer: (a).line always lies above the equilibrium curve.
Q38.
Total reflux in a distillation operation requires minimum

a.

reboiler load

b.

number of plates

c.

condenser load

d.

all (a), (b) and (c)

Discuss
Answer: (b).number of plates
Q39.
The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by

a.

raising the temperature.

b.

lowering the total pressure.

c.

both (a) and (b).

d.

neither (a) nor (b).

Discuss
Answer: (c).both (a) and (b).
Q40.
The difference of wet bulb temperature and adiabatic saturation temperature of unsaturated mixture of any system is

a.

+ve

b.

-ve

c.

zero

d.

none of these

Discuss
Answer: (a).+ve
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