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 26 of 67

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Q251.
Rate of leaching increases with increasing

a.

temperature

b.

viscosity of solvent

c.

pressure

d.

size of the solid

Discuss
Answer: (a).temperature
Q252.
An azeotropic mixture is a __________ mixture.

a.

binary

b.

ternary

c.

constant boiling point

d.

none of these

Discuss
Answer: (c).constant boiling point
Q253.
Pick out the wrong statement.

a.

In the McCabe-Thiele diagram for binary distillation, vertical feed line represents saturated liquid feed and horizontal feed line represents saturated vapour feed.

b.

In small columns, local efficiency is larger than Murphree efficiency; in large columns local efficiency is smaller than Murphree efficiency.

c.

For Laminar flow over a plate of length L, the local mass transfer co-efficient at a distance L from the leading edge is 1.5 x 10⁻²m/s. Then the average mass transfer co-efficient for the plate is 2 x 10⁻²m/s.

d.

The concentration and hydrodynamic boundary layers over a flat plate are of equal thickness, if Schmidt number is equal to unity.

Discuss
Answer: (c).For Laminar flow over a plate of length L, the local mass transfer co-efficient at a distance L from the leading edge is 1.5 x 10⁻²m/s. Then the average mass transfer co-efficient for the plate is 2 x 10⁻²m/s.
Q254.
Molecular seives are regenerated by heating to __________ °C.

a.

< 150

b.

200-330

c.

> 500

d.

> 1000

Discuss
Answer: (b).200-330
Q255.
In a counter-current extractor, as the axial mixing increases, the extraction efficiency

a.

increases

b.

decreases

c.

remains unchanged

d.

depends on the pressure of the system

Discuss
Answer: (b).decreases
Q256.
Heat sensitive materials like certain pharmaceuticals and food stuffs can be dried in a/an __________ dryer.

a.

indirect tray

b.

spray

c.

freeze

d.

none of these

Discuss
Answer: (c).freeze
Q257.
In extractive distillation, solvent is

a.

added to alter the relative volatility of the mixture.

b.

of high volatility.

c.

present in overhead stream.

d.

of high viscosity to give high tray efficiency.

Discuss
Answer: (a).added to alter the relative volatility of the mixture.
Q258.
Which of these columns incurs the lowest pressure drop ?

a.

Packed column (with stacked packing)

b.

Packed column (with dumped packing)

c.

Bubble plate column

d.

Pulse column

Discuss
Answer: (a).Packed column (with stacked packing)
Q259.
In the desorption of highly soluble gas from the liquid, the main resistance will be in the __________ phase.

a.

gas

b.

liquid

c.

both (a) & (b)

d.

neither (a) nor (b)

Discuss
Answer: (b).liquid
Q260.
If G = insoluble gas in gas stream and L = non-volatile solvent in liquid stream, then the slope of the operating line for the absorber is

a.

L/G

b.

G/L

c.

always < 1

d.

none of these

Discuss
Answer: (a).L/G
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