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 42 of 67

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Q411.
H₂S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H₂S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in metres) corresponding to an operating line given by, y = 5x + 0.001 is

a.

2.0

b.

1.56

c.

1.0

d.

0.56

Discuss
Answer: (a).2.0
Q412.
Packed column distillation is limited to the column __________ metres.

a.

height < 6

b.

diameter < 0.6

c.

both (a) & (b)

d.

neither (a) nor (b).

Discuss
Answer: (c).both (a) & (b)
Q413.
For the flow of gases through a capillary, with increase in temperature, the permeability __________ as per Knudsen law.

a.

increases

b.

decreases

c.

remains same

d.

either (a) or (b); depends on the gas

Discuss
Answer: (a).increases
Q414.
The operating cost of a distillation column at minimum reflux ratio is

a.

minimum

b.

maximum

c.

infinite

d.

zero

Discuss
Answer: (a).minimum
Q415.
The reflux to a distillation column is 100 moles/hr, when the overhead product rate is 50 moles/hr. The reflux ratio is

a.

2

b.

0.5

c.

50

d.

150

Discuss
Answer: (a).2
Q416.
Molecular diffusivity of a liquid

a.

increases with temperature.

b.

decreases with temperature.

c.

may increase or decrease with temperature.

d.

is independent of temperature.

Discuss
Answer: (a).increases with temperature.
Q417.
The wet and dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C.

a.

25

b.

> 25

c.

< 25

d.

- 25

Discuss
Answer: (b).> 25
Q418.
Henry's law states that the

a.

partial pressure of a component over a solution is proportional to its mole fraction in the liquid.

b.

partial pressure of a component over a solution is proportional to the mole fraction in the vapour.

c.

vapour pressure is equal to the product of the mole fraction and total pressure.

d.

partial pressure is equal to the product of the mole fraction and total pressure.

Discuss
Answer: (a).partial pressure of a component over a solution is proportional to its mole fraction in the liquid.
Q419.
The relative volatility of a binary mixture at constant temperature __________ the total pressure.

a.

decreases with increase in

b.

increases with increase in

c.

is independent of

d.

none of these

Discuss
Answer: (a).decreases with increase in
Q420.
Tower diameter may be decreased by

a.

using higher reflux ratio.

b.

use of increased tray spacing.

c.

increasing the liquid flow rate.

d.

increasing the vapour flow rate.

Discuss
Answer: (b).use of increased tray spacing.
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