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

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Q421.
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
Q422.
Dimension of kinematic viscosity is

a.

MLTโป¹

b.

L² . Tโป¹

c.

L²T

d.

L² . Tโป²

Discuss
Answer: (b).L² . Tโป¹
Q423.
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.
Q424.
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
Q425.
__________ forces do not act in case of fluid flow.

a.

Elastic

b.

Tensile

c.

Vibratory

d.

Centrifugal

Discuss
Answer: (b).Tensile
Q426.
An ideal plastic substance indicates no deformation, when stressed upto yield stress, but behaves like a Newtonion fluid beyond yield stress. Which of the following is an ideal plastic ?

a.

Sewage sludge

b.

Rubber latex

c.

Blood

d.

Sugar solution

Discuss
Answer: (a).Sewage sludge
Q427.
The capacity of a centrifugal pump Can be increased by increasing the

a.

impeller diameter or speed.

b.

number of pumps and joining them in series,

c.

number of pumps and joining them in parallel.

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
Q428.
Which law is followed by the velocity distribution in the turbulent boundary layer?

a.

Parabolic law

b.

Linear law

c.

Logarithmic law

d.

None of these

Discuss
Answer: (c).Logarithmic law
Q429.
The losses in open channel flow generally vary as the

a.

inverse of the roughness.

b.

first power of the roughness.

c.

square of the velocity.

d.

inverse square of hydraulic radius.

Discuss
Answer: (b).first power of the roughness.
Q430.
Rise of liquid in a capillary tube is due to

a.

cohesion

b.

adhesion

c.

both (a) & (b)

d.

neither (a) nor (b)

Discuss
Answer: (c).both (a) & (b)
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