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 35 of 67

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Q341.
In case of absorption & stripping, the interface of the liquid & gas phases are present in equilibrium, when the diffusional resistance of __________ is zero.

a.

interface

b.

gas phase

c.

liquid phase

d.

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

Discuss
Answer: (a).interface
Q342.
Pick out the wrong statement pertaining to the analogy between equations of heat and mass transfer operations.

a.

Sherwood number in mass transfer is analogous to Nusselt number in heat transfer.

b.

Prandtl number in heat transfer is analogous to Schmidt number in mass transfer.

c.

Reynolds number in mass transfer is analogous to Grashoff number in heat transfer.

d.

Reynolds number remains the same in both heat and mass transfer.

Discuss
Answer: (c).Reynolds number in mass transfer is analogous to Grashoff number in heat transfer.
Q343.
The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is

a.

0

b.

∞

c.

-ve

d.

+ve

Discuss
Answer: (c).-ve
Q344.
The individual mass transfer co-efficients (moles/m² . s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of the following resistance (s) is (are) controlling ?

a.

liquid side

b.

gas side

c.

interfacial

d.

both liquid and gas side

Discuss
Answer: (b).gas side
Q345.
Measurement of the interfacial area of mass transfer is achieved easily & accurately in case of a __________ coloumn.

a.

spray

b.

packed

c.

bubble cap plate

d.

wetted wall

Discuss
Answer: (d).wetted wall
Q346.
With the lowering of equiliDrium pressure, at a given temperature, the amount of ad-sorbate on the adsorbent

a.

increases.

b.

decreases.

c.

remains same.

d.

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

Discuss
Answer: (b).decreases.
Q347.
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.
Q348.
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.
Q349.
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)
Q350.
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
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