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 75 of 77

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Q741.
The Reynolds number for an ideal fluid flow is

a.

4

b.

2100-4000

c.

4000

d.

∞

Discuss
Answer: (d).∞
Q742.
The continuity equation of fluid mechanics utilises the principle of conservation of

a.

momentum

b.

mass

c.

energy

d.

both (b) & (c)

Discuss
Answer: (b).mass
Q743.
Stoke's law is valid, when the particle Reynolds number is

a.

< 1

b.

> 1

c.

< 5

d.

none of these

Discuss
Answer: (a).< 1
Q744.
Which of the following is not a dimension-less parameter ?

a.

Pressure-co-efficient

b.

Froude number

c.

Kinematic viscosity

d.

Weber number

Discuss
Answer: (c).Kinematic viscosity
Q745.
In which of the following cases, it is possible for flow to occur from low pressure to high pressure ?

a.

Flow of liquid upward in a vertical pipe.

b.

Flow through a converging section.

c.

Flow of air downward in a pipe.

d.

Impossible in a constant cross-section conduit.

Discuss
Answer: (b).Flow through a converging section.
Q746.
A centrifugal pump designed to pump water is employed to pump a more viscous oil. In the later case, the pump

a.

develops a lower head.

b.

capacity is reduced.

c.

requires more power.

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
Q747.
The actual velocity at vena-contracta for flow through an orifice from a reservoir is given by

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q748.
For flow through a venturi at a particular discharge, the correct relationships among heads at points X, Y, and Z are

a.

h₁ > h₂ < h₃

b.

h₁ > h₂ > h₃

c.

h₂ < h₁ < h₃

d.

h₁ < h₂ < h₃

Discuss
Answer: (a).h₁ > h₂ < h₃
Q749.
The hydraulic radius for flow in a rectangular duct of cross-sectional dimension H, W is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q750.
A pipe has a porous section of length L as shown in the figure. Velocity at the start of this section of V₀. If fluid leaks into the pipe through the porous section at a volumetric rate per unit area q(x/L)², what will be axial velocity in the pipe at any x ? Assume incompressible one dimensional flow i.e., no gradients in the radial direction.

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (d).D
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