Fluid Mechanics MCQs

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

Fluid Mechanics MCQs | Page 67 of 77

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Q661.
Ratio of pressure and inertia force gives __________ number.

a.

Weber

b.

Mach

c.

Euler

d.

Froude

Discuss
Answer: (c).Euler
Q662.
The terminal velocity of a solid spherical particle falling through a stationary fluid mass in the Stoke's law range is proportional to the

a.

inverse of fluid viscosity.

b.

square of particle size.

c.

difference in the densities of the particle & fluid.

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
Q663.
Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ฮตโ‚€) with age/time (t) (where, ฮต = roughness of the surface after time't'. ฮฑ = a co-efficient to be experimentally determined)?

a.

ฮต = ฮตโ‚€ + ฮฑ.t

b.

ฮต = ฮตโ‚€ + ฮฑ.t²

c.

ฮต = ฮตโ‚€ + ฮฑ.t³

d.

ฮต = ฮตโ‚€ + ฮฑ.tโด

Discuss
Answer: (a).ฮต = ฮตโ‚€ + ฮฑ.t
Q664.
Fluidised beds are formed, when the

a.

fluid friction is zero

b.

gravity force is less than the fluid friction.

c.

pressure forces equal gravity forces.

d.

sum of the fluid friction and pressure forces is equal and opposite to gravity forces.

Discuss
Answer: (b).gravity force is less than the fluid friction.
Q665.
A fluid is pumped at the rate of 10 lb/sec to a height of 55 ft. The horse power required is __________ hp.

a.

1

b.

10/55

c.

5.5

d.

1/55

Discuss
Answer: (a).1
Q666.
With increase in pump speed, its NPSH requirement

a.

decreases

b.

increases

c.

remains unaltered

d.

can either increase or decrease ; depends on other factors

Discuss
Answer: (b).increases
Q667.
In the Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is __________ the fluid viscosity.

a.

directly proportional to

b.

inversely proportional to

c.

inversely proportional to the square root of

d.

independent of

Discuss
Answer: (b).inversely proportional to
Q668.
Gear pump

a.

is a positive displacement pump.

b.

is a centrifugal pump.

c.

is a non-positive displacement pump.

d.

can be started with delivery valve closed.

Discuss
Answer: (a).is a positive displacement pump.
Q669.
Most of the centrifugal pumps used in chemical plants are usually __________ driven.

a.

steam

b.

diesel engine

c.

electric motor

d.

gas turbine

Discuss
Answer: (c).electric motor
Q670.
Check valve provided in the discharge line of a centrifugal pump serves the purpose of controlling the

a.

back flow of fluid in the event of stoppage of pump.

b.

discharge pressure.

c.

flow of liquid during operation of the pump.

d.

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

Discuss
Answer: (a).back flow of fluid in the event of stoppage of pump.
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