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 17 of 67

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Q161.
On moving the feed line (q-line) from saturated liquid feed (vertical position) to saturated vapor feed (horizontal feed), if the slope of both the operating lines are to be increased, then it will result in

a.

greater degree of separation with a fixed number of trays

b.

increased reboiler load

c.

increased reflux ratio

d.

None of these.

Discuss
Answer: (c).increased reflux ratio
Q162.
__________ column is the most suitable for achieving the best performance for mass transfer operations involving liquid with dispersed solids.

a.

Watted wall

b.

Packed

c.

Plate

d.

Spray

Discuss
Answer: (c).Plate
Q163.
Deairation (removal of O₂) of water is done by

a.

rectification

b.

absorption

c.

ion-exchange

d.

adsorption

Discuss
Answer: (c).ion-exchange
Q164.
Make up water is supplied during cooling tower operation to compensate for water losses due to

a.

evaporation

b.

blowdown

c.

entrainment

d.

all (a), (b)&(c)

Discuss
Answer: (d).all (a), (b)&(c)
Q165.
Pick out the wrong statement.

a.

The mole fraction of solute is directly proportional to the molality of a 'dilute' solution.

b.

For a non-reacting binary mixture of ideal gases, the partial pressure distribution of both components is nonlinear in the case of steady state unimolal unidirectional diffusion.

c.

Azeotropes obey Raoult's law at all temperature.

d.

The relative volatility of a binary mixture at the azeotropic composition is 1.

Discuss
Answer: (c).Azeotropes obey Raoult's law at all temperature.
Q166.
The Kundsen diffusivity is proportional to (where, T = absolute temperature)

a.

√T

b.

T²

c.

T

d.

T⁴

Discuss
Answer: (a).√T
Q167.
In case of constant underflow extraction operation, the __________ at all solute concentration.

a.

solids are drained to the same extent

b.

ratio of the insoluble to solution is constant

c.

both(a) & (b)

d.

neither (a) nor (b)

Discuss
Answer: (c).both(a) & (b)
Q168.
In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing.

a.

greater than

b.

smaller than

c.

equal to

d.

either (a), or (b) ; depends on the type of packing

Discuss
Answer: (b).smaller than
Q169.
The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the driving force. and, Kp = M.T.C. for diffusion of a gas through a stagnant inert gas with pressure as driving force.)

a.

Kc = Kp = Km

b.

Kc = Kp/RT = Km . RT/P

c.

Kc = Kp . RT = Km . RT/p

d.

none of these

Discuss
Answer: (c).Kc = Kp . RT = Km . RT/p
Q170.
With increase in temperature, the leaching rate increases because of the

a.

increased diffusivity.

b.

decreased viscosity of liquid.

c.

both (a) and (b).

d.

neither (a) nor (b).

Discuss
Answer: (c).both (a) and (b).
Page 17 of 67