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 41 of 77

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Q401.
Select the correct statement.

a.

The discharge through a venturimeter depends upon ฮ”p only and is independent of orientation of the meter.

b.

A venturimeter with a given gage difference discharges at a greater rate, when the flow is vertically downward through it, than when the flow is vertically upward.

c.

For a given pressure difference, the discharge of gas is greater through a venturimeter, when compressibility is taken into account, than when it is neglected.

d.

The overall pressure loss is the same in a given pipe line, whether a venturimeter or a nozzle with the same throat dia is used.

Discuss
Answer: (a).The discharge through a venturimeter depends upon ฮ”p only and is independent of orientation of the meter.
Q402.
In case of turbulent flow of fluid through a circular pipe, the

a.

mean flow velocity is about 0.5 times the maximum velocity.

b.

velocity profile becomes flatter and flatter with increasing Reynolds number.

c.

point of maximum instability exists at a distance of 2r/3 from the pipe wall (r = pipe radius).

d.

skin friction drag, shear stresses, random orientation of fluid particles and slope of velocity profile at the wall are more.

Discuss
Answer: (d).skin friction drag, shear stresses, random orientation of fluid particles and slope of velocity profile at the wall are more.
Q403.
For the same terminal conditions and valve size, the pressure drop in a fully opened globe valve as compared to that in a gate valve is

a.

more

b.

less

c.

equal

d.

either (a) or (b); depends on the viscosity of the fluid

Discuss
Answer: (a).more
Q404.
Steady fluid flow occurs, when the derivative of flow variables satisfy the following condition.

a.

โˆ‚/โˆ‚s = 0

b.

โˆ‚/โˆ‚t = 0

c.

โˆ‚/โˆ‚s = constant

d.

โˆ‚/โˆ‚t = constant

Discuss
Answer: (b).โˆ‚/โˆ‚t = 0
Q405.
What is the maximum theoretical suction lift (metres) of a reciprocating pump ?

a.

5

b.

10

c.

50

d.

100

Discuss
Answer: (b).10
Q406.
The terminal velocity of a particle moving through a fluid varies as dโ‚šโฟ. The value of n is equal to __________ in Stoke's law regime.

a.

1

b.

0.5

c.

2

d.

1.5

Discuss
Answer: (c).2
Q407.
Function of air vessel provided in a reciprocating pump is to

a.

reduce discharge fluctuation.

b.

reduce the danger of cavitation.

c.

avoid the necessity of priming.

d.

increase the pump efficiency.

Discuss
Answer: (a).reduce discharge fluctuation.
Q408.
The Prandtl pitot tube measures the

a.

velocity at a point in the flow.

b.

pressure at a point.

c.

average flow velocity.

d.

pressure difference in pipe flow.

Discuss
Answer: (a).velocity at a point in the flow.
Q409.
Vena-contracta formed during flow of a liquid through an orificemeter has

a.

minimum liquid cross-section.

b.

more diameter compared to orifice diameter.

c.

minimum velocity of fluid stream.

d.

none of these.

Discuss
Answer: (a).minimum liquid cross-section.
Q410.
As per Newton's law of viscosity, the shear stress for a given rate of angular deformation of fluid is proportional to(where, ฮผ = fluid viscosity)

a.

1/ฮผ

b.

ฮผ

c.

ฮผ²

d.

1/ฮผ²

Discuss
Answer: (b).ฮผ
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