Mechanical Operations MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Mechanical Operations, 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 Mechanical Operations 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 Mechanical Operations mcq questions that explore various aspects of Mechanical Operations problems. Each MCQ is crafted to challenge your understanding of Mechanical Operations 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 Mechanical Operations 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 Mechanical Operations. 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 Mechanical Operations knowledge to the test? Let's get started with our carefully curated MCQs!

Mechanical Operations MCQs | Page 15 of 46

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Q141.
Tabling process used for separating two materials of different densities by passing the dilute pulp over a table/deck, which is inclined from the horizontal surface at an angle of about

a.

1 to 2°

b.

2 to 5°

c.

5 to 10°

d.

10 to 15°

Discuss
Answer: (b).2 to 5°
Q142.
Which of the following gives the work required for size reduction of coal to -200 mesh in a ball mill most accurately ?

a.

Rittinger's law

b.

Kick's law

c.

Bond's law

d.

none of these

Discuss
Answer: (a).Rittinger's law
Q143.
Electrical energy consumed by a jaw crusher is not a function of the

a.

average feed size

b.

average product size

c.

machine capacity

d.

none of these

Discuss
Answer: (d).none of these
Q144.
Size reduction mechanism used in Jaw crushers is

a.

attrition

b.

compression

c.

cutting

d.

impact

Discuss
Answer: (b).compression
Q145.
Trommels employ __________ for screening of materials.

a.

fibrous cloth

b.

woven wire screen

c.

punched plate

d.

none of these

Discuss
Answer: (c).punched plate
Q146.
Pick out the wrong statement.

a.

Gape is the greatest distance between the crushing surfaces or the jaws.

b.

The angle of nip (2α) is the angle between roll faces at the level where they will just take hold of a particle and draw it in the crushing zone.

c.

Crushing efficiency is the ratio of the energy absorbed by the solid to the surfaces energy created by crushing.

d.

Reduction ratio is the ratio of the maximum size of the particles in the feed to that in the product.

Discuss
Answer: (c).Crushing efficiency is the ratio of the energy absorbed by the solid to the surfaces energy created by crushing.
Q147.
Addition of filter aid to the slurry before filtration is done to ...... of the cake.

a.

increase the porosity

b.

increase the compressibility co-efficient

c.

decrease the porosity

d.

decrease the compressibility co-efficient

Discuss
Answer: (a).increase the porosity
Q148.
Which of the following terminology is not used for size reduction of materials to fine sizes or powders?

a.

Comminution

b.

Dispersion

c.

Pulverisation

d.

Compression

Discuss
Answer: (d).Compression
Q149.
A tube mill as compared to a ball mill

a.

employs smaller balls.

b.

gives finer size reduction but consumes more power.

c.

has larger length/diameter ratio (>2 as compared to 1 for ball mill).

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
Q150.
Kick's law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick's constant is

a.

kW. sec/kg

b.

kWh/kg

c.

kWh/sec. kg

d.

kg/sec.

Discuss
Answer: (a).kW. sec/kg
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