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 5 of 77

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Q41.
Hydraulic mean radius for flow through packed bed of spherical particle of size, 'Dโ‚š', with porosity 'ฮต' is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q42.
A conical tank with a bottom opening of cross-sectional area A is filled with water and is mounted on supports as shown in the figure. What is the force F with which plate X must be pushed up to prevent water from leaking ? Assume that the density of air is negligible as compared to the density of water ฯL.

a.

ฯL . Vg

b.

ฯL . A.Hg

c.

ฯL . Vg/2

d.

ฯL .Vg/3

Discuss
Answer: (b).ฯL . A.Hg
Q43.
The equivalent diameter for pressure drop calculation for a duct of square cross-section is given by(where, x = each side of the square duct)

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q44.
Each term of the Bernoulli's equation written in the following form, represents the total energy per unit

a.

mass

b.

volume

c.

specific weight

d.

none of these

Discuss
Answer: (a).mass
Q45.
Which of the following denotes the effect of compressibility in fluid flow ?

a.

Weber number

b.

Mach number

c.

Euler number

d.

Reynolds number

Discuss
Answer: (b).Mach number
Q46.
Nominal size of the discharge pipe of a pump is usually __________ the nominal size of the inlet pipe.

a.

smaller than

b.

larger than

c.

same as

d.

twice

Discuss
Answer: (a).smaller than
Q47.
The terminal velocity of a small sphere settling in a viscous fluid varies as the

a.

first power of its dimeter.

b.

inverse of the fluid viscosity.

c.

inverse square of the diameter.

d.

square of the difference in specific weights of solid & fluid.

Discuss
Answer: (b).inverse of the fluid viscosity.
Q48.
If the discharge of a centrifugal pump is throttled, then its suction lift

a.

increases

b.

decreases

c.

remains unchanged

d.

data insufficient to predict

Discuss
Answer: (a).increases
Q49.
Foot valves provided in pumps are __________ valves.

a.

relief

b.

three/four way

c.

pressure reducing

d.

directional control

Discuss
Answer: (d).directional control
Q50.
With increasing flow rate, the hydraulic efficiency of a centrifugal pump

a.

monotonically decreases.

b.

decreases and then increases.

c.

remains constant.

d.

increases and then decreases.

Discuss
Answer: (a).monotonically decreases.
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