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 26 of 46

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Q251.
During washing of filter at the end of constant pressure filtration, the rate of washing equals the rate of filtration

a.

at time zero.

b.

at the end of filtration.

c.

when half the filtrate has been obtained.

d.

at the end of filtration, but decreases with time subsequently.

Discuss
Answer: (b).at the end of filtration.
Q252.
In screen analysis, the notation +5 mm/-10 mm means particles passing through

a.

10 mm screen and retained on 5 mm screen.

b.

5 mm screen and retained on 10 mm screen.

c.

both 5 mm and 10 mm screens.

d.

neither 5 mm nor 10 mm screen.

Discuss
Answer: (a).10 mm screen and retained on 5 mm screen.
Q253.
Solid particles of different densities are separated by

a.

filters

b.

thickness

c.

cyclones

d.

sorting classifier

Discuss
Answer: (d).sorting classifier
Q254.
During agitation of liquids, power consumption during laminar flow is not proportional to the

a.

density of the liquid

b.

viscosity of the liquid

c.

cube of impeller diameters

d.

square of rotational speed.

Discuss
Answer: (a).density of the liquid
Q255.
Trommels are revolving screens which normally operate in the range of __________ rpm.

a.

1 - 2

b.

15 - 20

c.

40 - 50

d.

60 - 75

Discuss
Answer: (b).15 - 20
Q256.
The value of work index does not change materially from one equipment to another. If the value of work index determined for close circuit grinding is Wแตข, then the same for open circuit grinding will be

a.

0.5 Wแตข

b.

Wแตข

c.

1.34 Wแตข

d.

3.34 Wแตข

Discuss
Answer: (c).1.34 Wแตข
Q257.
Maximum size reduction in a fluid energy mill is achieved by

a.

compression

b.

interparticle attrition

c.

cutting

d.

impact

Discuss
Answer: (b).interparticle attrition
Q258.
With increase in the capacity of screens, the screen effectiveness

a.

remains unchanged

b.

increases

c.

decreases

d.

decreases exponentially

Discuss
Answer: (c).decreases
Q259.
As particle size is reduced

a.

screening becomes progressively more difficult.

b.

screening becomes progressively easier.

c.

capacity and effectiveness of the screen is increased.

d.

none of these.

Discuss
Answer: (a).screening becomes progressively more difficult.
Q260.
Rittinger number which designates the new surface prduced per unit of mechanical energy absorbed by the material being crushed, depends on the

a.

state or manner of application of the crushing force.

b.

ultimate strength of the material.

c.

elastic constant of the material.

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
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