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 60 of 67

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Q591.
Pick out the wrong statement.

a.

Packed towers are preferred for vacuum operation, because the pressure drop through the packing is less and they (packings) also lessen the possibility of tower wall collapse.

b.

Packed towers are preferred over plate towers for handling corrosive and foamy liquids.

c.

Diameter of randomly packed tower is normally more than 1.2 metres.

d.

Due to uneven supply and improper distribution of liquid, problem of channeling, loading & flooding is generally encountered in packed towers.

Discuss
Answer: (c).Diameter of randomly packed tower is normally more than 1.2 metres.
Q592.
Nitrobenzene (boiling point = 210.6°C) is steam distilled at 1 atm pressure.Nitrobenzene will distill off __________ °C.

a.

at < 100

b.

at > 210.6

c.

between 100 and 210

d.

none of these

Discuss
Answer: (a).at < 100
Q593.
Pick out the wrong statement.

a.

With decrease in feed temperature, the number of plates required for binary distillation decreases for a given L/V ratio.

b.

The extraction per unit of total height for a short packed column is more effective than for a tall column, in case of liquid-liquid extraction.

c.

Natural draft cooling towers are made of ferro-concrete and its cross-section is wider at the bottom.

d.

Vanderwall adsorption is also called chemisorption.

Discuss
Answer: (d).Vanderwall adsorption is also called chemisorption.
Q594.
At what value of reflux ratio, number of theoretical plates in a distillation column is minimum ?

a.

0

b.

1

c.

∞

d.

< 1

Discuss
Answer: (c).∞
Q595.
Batch tray dryers suffers from the disadvantage of

a.

high maintenance cost.

b.

non-uniform & low production rate.

c.

high labour cost & low heat economy.

d.

all 'a', 'b' & 'c'.

Discuss
Answer: (c).high labour cost & low heat economy.
Q596.
In a moderately sized packed absorption tower, channeling (which is most severe with stacked packings) can be minimised by taking the ratio of tower diameter to packing diameter

a.

> 4 :1

b.

< 8 : 1

c.

> 8:1

d.

< 6:1

Discuss
Answer: (c).> 8:1
Q597.
An alkaline solution is used to reduce the concentration of carbon dioxide in a stream from 10% to 0.1% by absorption with irreversible chemical reaction. The overall number of transfer units based on gas phase is

a.

9.21

b.

4.605

c.

100

d.

0.001

Discuss
Answer: (b).4.605
Q598.
HETP is numerically equal to HTU, only when the operating line

a.

lies below the equilibrium line.

b.

lies above the equilibrium line.

c.

and equilibrium lines are parallel.

d.

is far from the equilibrium line.

Discuss
Answer: (c).and equilibrium lines are parallel.
Q599.
In a distillation operation, what is the effect of the temperature of the reflux stream (given below) on the condenser and reboiler loads ?

Reflux conditions:
(i) Reflux stream is completely liquid and is at its bubble point.
(ii) Reflux stream is below its bubble point.

a.

Condenser and reboiler loads are the same in both the cases.

b.

Reboiler load is the same in both the cases but condenser load is higher in case (ii).

c.

Condenser load is the same in both the cases but reboiler load is higher in case (ii).

d.

Both condensor and reboiler loads are higher in case (ii) as compared to case (i).

Discuss
Answer: (d).Both condensor and reboiler loads are higher in case (ii) as compared to case (i).
Q600.
Steady state equimolal counter diffusion occurs in case of

a.

leaching

b.

absorption

c.

binary phase distillation

d.

liquid-liquid extraction

Discuss
Answer: (c).binary phase distillation
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