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 43 of 77

Discover more Topics under Basic Chemical Engineering

Q421.
The head loss in turbulent flow in pipe is proportional to(where, V = velocity of fluid through the pipe)

a.

V²

b.

1/V²

c.

1/V

d.

V

Discuss
Answer: (a).V²
Q422.
Unsteady non-uniform flow is represented by flow through a/an

a.

long pipe at constant rate.

b.

long pipe at decreasing rate.

c.

expanding tube at increasing rate.

d.

expanding tube at constant rate.

Discuss
Answer: (c).expanding tube at increasing rate.
Q423.
Prandtl number is a measure of the

a.

heat conduction to viscosity of a fluid.

b.

Cp/Cv of a fluid.

c.

elastic force to pressure force in the fluid flow.

d.

inertial force to elastic force in the fluid flow.

Discuss
Answer: (a).heat conduction to viscosity of a fluid.
Q424.
A centrifugal pump has the following specifications:

Power = 4 H.P.
Speed = 800 rpm
Head = 8 metres
Flow = 1000 litres/minutes.

If its speed is halved, then the new head will be __________ metres.

a.

2

b.

4

c.

8

d.

5.5

Discuss
Answer: (a).2
Q425.
In hindered settling, the particles are

a.

placed farther from the wall.

b.

not affected by other particles and the wall.

c.

near each other,

d.

none of these.

Discuss
Answer: (c).near each other,
Q426.
A bed of spherical particles (specific gravity 2.5) of uniform size 1500 ฮผm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle system (in SI units) is given below :

ฮ” P/L = 375 x 10³ Vโ‚’โ‚˜ + 10.94 x 10โถ V²โ‚’โ‚˜ (SI units)

If water is to be used as the fluidising medium, in actual operation, the above bed has a height = 1 m. What is the porosity of the fluidised bed ?

a.

0.2

b.

0.5

c.

0.7

d.

0.8

Discuss
Answer: (c).0.7
Q427.
Dimension of kinematic viscosity is

a.

MLTโป¹

b.

L² . Tโป¹

c.

L²T

d.

L² . Tโป²

Discuss
Answer: (b).L² . Tโป¹
Q428.
A streamline is a line in flow field,

a.

that is traced by all the fluid particles passing through a given point.

b.

along which a fluid particle travels.

c.

such that at every point on it, the velocity is tangential to it.

d.

none of these.

Discuss
Answer: (c).such that at every point on it, the velocity is tangential to it.
Q429.
While starting an axial flow pump, its delivery valve should be kept

a.

open

b.

closed

c.

either open or closed

d.

none of these

Discuss
Answer: (a).open
Q430.
__________ forces do not act in case of fluid flow.

a.

Elastic

b.

Tensile

c.

Vibratory

d.

Centrifugal

Discuss
Answer: (b).Tensile
Page 43 of 77