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 22 of 46

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Q211.
Rittinger's crushing law states that

a.

work required to form a particle of any size is proportional to the square of the surface to volume ratio of the product.

b.

work required to form a particle of a particular size is proportional to the square root of the surface to volume ratio of the product.

c.

work required in crushing is proportional to the new surface created.

d.

for a given machine and feed, crushing efficiency is dependent on the size of the feed & product.

Discuss
Answer: (c).work required in crushing is proportional to the new surface created.
Q212.
Mechanical conveyors which push the material along an endless trough or tube are called scrappers. Which of the following conveying equipments comes under the category of 'scrappers' ?

a.

Bucket conveyor

b.

Flight conveyor

c.

Screw conveyor

d.

Both (b) and (c)

Discuss
Answer: (d).Both (b) and (c)
Q213.
Sphericity of pulverised coal is

a.

1

b.

<1

c.

>1

d.

∞

Discuss
Answer: (b).<1
Q214.
In a ball mill, the volume occupied by the balls (when the mill is stopped) is about __________ percent of the volume of the mill.

a.

35

b.

50

c.

70

d.

85

Discuss
Answer: (b).50
Q215.
Separation of materials of the same density based on their sizes by using then-different rates of flow is called

a.

sorting

b.

sizing

c.

flocculation

d.

elutriation

Discuss
Answer: (b).sizing
Q216.
Molten ammonium nitrate is mixed with ground limestone in fertilizer plant in a

a.

pug mill

b.

mixer-extruder

c.

banbury mixer

d.

muller mixer

Discuss
Answer: (a).pug mill
Q217.
Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are

a.

carbonates

b.

sulphates

c.

silicates & phosphates

d.

bi-carbonates

Discuss
Answer: (c).silicates & phosphates
Q218.
For a sphere falling in the constant drag co-efficient regime, its terminal velocity depends on its diameter (d) as

a.

d

b.

√d

c.

d²

d.

1/d

Discuss
Answer: (c).d²
Q219.
Screen capacity is expressed in terms of

a.

tons/hr

b.

tons/ft²

c.

both (a) & (b)

d.

tons/hr-ft²

Discuss
Answer: (d).tons/hr-ft²
Q220.
A screen is said to be blinded, when the

a.

oversizes are present in undersize fraction.

b.

undersizes are retained in oversize fraction.

c.

screen is plugged with solid particles.

d.

screen capacity is abruptly increased.

Discuss
Answer: (c).screen is plugged with solid particles.
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