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 36 of 67

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Q351.
Mass transfer co-efficient is defined as

a.

Flux = Co-efficient/concentration difference.

b.

Co-efficient = Flux/concentration difference.

c.

Flux=concentration difference/co-effi-cient.

d.

none of these.

Discuss
Answer: (b).Co-efficient = Flux/concentration difference.
Q352.
When an unsaturated air-water mixture is heated at constant pressure, then

a.

the partial pressure of water vapour increases.

b.

the specific humidity decreases.

c.

The relative humidity increases.

d.

the relative humidity decreases.

Discuss
Answer: (d).the relative humidity decreases.
Q353.
During sensible cooling process

a.

relative humidity decreases

b.

relative humidity increases

c.

wet bulb temperature decreases

d.

both (b) and (c)

Discuss
Answer: (d).both (b) and (c)
Q354.
Experiments were conducted to determine the flux of a species A in a stagnant medium across a gas-liquid interface. The overall mass transfer co-efficient based on the liquid side for dilute systems for the above was estimated to be 4 x 10⁻³ kg mole/m².s. The equilibrium data for the system is given as y = 2x. The flux across the interface (in kg mole/m² .s) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.01 respectively is

a.

5.6 x 10⁻⁴

b.

8.5 x 10⁻⁴

c.

5.6 x 10⁻³

d.

8.5 x 10⁻³

Discuss
Answer: (b).8.5 x 10⁻⁴
Q355.
Leaching of coarse solid lumps is also termed as

a.

decoction

b.

dissolution

c.

percolation

d.

agitation and settling

Discuss
Answer: (c).percolation
Q356.
The main reason for dividing a tall packed tower into series of small towers is to

a.

minimise the overall pressure drop.

b.

avoid flooding.

c.

reduce liquid hold up.

d.

avoid channeling.

Discuss
Answer: (d).avoid channeling.
Q357.
Co-current absorbers are usually used when the gas to be dissolved in the liquid is

a.

sparingly soluble

b.

highly soluble

c.

a pure substance

d.

a mixture

Discuss
Answer: (c).a pure substance
Q358.
At what percentage (by volume) of alcohol composition, it forms an azeotrope with water ?

a.

90

b.

91.5

c.

95

d.

99

Discuss
Answer: (c).95
Q359.
The overall mass transfer co-efficient for the absorption of SO₂ in air with dilute NaOH solution can be increased substantially by

a.

increasing the gas film co-efficient.

b.

increasing the liquid film co-efficient.

c.

increasing the total pressure.

d.

decreasing the total pressure.

Discuss
Answer: (a).increasing the gas film co-efficient.
Q360.
Flooding results in

a.

high tray efficiency

b.

low tray efficiency

c.

high gas velocity

d.

good contact between the fluids

Discuss
Answer: (b).low tray efficiency
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