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 3 of 67

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Q21.
For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG:mass transfer co-efficient, mols/m² , a: in-terfacial area per unit volume of tower)

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q22.
Relative humidity is the ratio of the

a.

partial pressure of the vapour to the vapour pressure of the liquid at room temperature.

b.

partial pressure of the vapour to the vapour pressure of the liquid at gas temperature.

c.

actual humidity to saturation humidity.

d.

none of these

Discuss
Answer: (b).partial pressure of the vapour to the vapour pressure of the liquid at gas temperature.
Q23.
In batch distillation with constant reflux, overhead product composition __________ with time.

a.

increases

b.

decreases

c.

does not vary

d.

may increase on decrease, depends on the system.

Discuss
Answer: (b).decreases
Q24.
Psychrometry deals with the properties of gas-vapor mixture. Humidity can be determined by the measurement of the __________ of a fibre.

a.

electrical resistance

b.

thermal conductivity

c.

strength

d.

none of these.

Discuss
Answer: (a).electrical resistance
Q25.
Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the

a.

latent heat

b.

humid heat

c.

specific heat

d.

sensible heat

Discuss
Answer: (c).specific heat
Q26.
To increase the absorption factor, (where, G = gas flow rate, S = solvent flow rate)

a.

increase both 'G' and 'S'.

b.

decrease both 'G' and 'S'.

c.

increase 'S' and decrease 'G'.

d.

increase 'G' and decrease 'S'

Discuss
Answer: (c).increase 'S' and decrease 'G'.
Q27.
In distillation columns, the number of bubble caps per tray primarily depends upon the

a.

allowable liquid velocity.

b.

allowable gas velocity.

c.

allowable gas and liquid velocities.

d.

feed composition.

Discuss
Answer: (c).allowable gas and liquid velocities.
Q28.
In distillation, overhead product contains

a.

only one component

b.

two components

c.

any number of components

d.

only saturated liquid

Discuss
Answer: (c).any number of components
Q29.
With increase in pressure, the relative volatility for a binary system

a.

increases.

b.

decreases.

c.

remains same.

d.

either (a) or (b), depends on the system.

Discuss
Answer: (b).decreases.
Q30.
Low viscosity absorbent is preferred for reasons of

a.

rapid absorption rates and good heat transfer characteristics.

b.

improved flooding characteristics.

c.

low pressure drop on pumping.

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
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