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 34 of 77

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Q331.
Pick out the wrong statement pertaining to fluid flow.

a.

The ratio of average velocity to the maximum velocity for turbulent flow of Newtonion fluid in circular pipes is 0.5.

b.

The Newtonion fluid velocity in a circular pipe flow is maximum at the centre of the pipe.

c.

Navier-Stokes equation is applicable to the analysis of viscous flows.

d.

Hagen-Poiseuille equation is applicable to the laminar flow of Newtonion fluids.

Discuss
Answer: (a).The ratio of average velocity to the maximum velocity for turbulent flow of Newtonion fluid in circular pipes is 0.5.
Q332.
A Newtonion liquid (ฯ = density, ฮผ = viscosity) is flowing with velocity v in a tube of diameter 'D'. Let ฮ”p be the pressure drop across the length 'L'. For a laminar flow, ฮ”p is proportional to

a.

L ฯv²/D

b.

L ฮผV/D²

c.

D ฯv²/L

d.

ฮผ V/L

Discuss
Answer: (a).L ฯv²/D
Q333.
While starting a centrifugal pump, its delivery valve should be kept

a.

opened.

b.

closed.

c.

either opened or closed ; it does not make any difference.

d.

either opened or closed; depending on the fluid viscosity.

Discuss
Answer: (b).closed.
Q334.
For flow past a flat plate, if x is the distance along the plate in the direction of flow, the boundary layer thickness is proportional to

a.

โˆšx

b.

1/โˆšx

c.

x

d.

1/x

Discuss
Answer: (a).โˆšx
Q335.
In case of venturimeters, friction losses are about __________ percent of maximum velocity head.

a.

2

b.

8

c.

12

d.

20

Discuss
Answer: (a).2
Q336.
With increase in the schedule number of a pipe of a particular nominal size, the

a.

wall thickness also increases.

b.

I.D. of the pipe decreases.

c.

O.D. of the pipe remains constant.

d.

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

Discuss
Answer: (d).all (a), (b) and (c)
Q337.
Turbine impeller

a.

produces only radial current.

b.

produces only tangential current.

c.

is effective over wide range of viscosities.

d.

does not produce tangential current.

Discuss
Answer: (c).is effective over wide range of viscosities.
Q338.
Friction produced by the formation of wakes is called the __________ friction.

a.

disk

b.

skin

c.

form

d.

none of these

Discuss
Answer: (c).form
Q339.
For liquid flow through a packed bed, the superficial velocity as compared to average velocity through the channel in the bed is

a.

more

b.

less

c.

equal

d.

independent of porosity

Discuss
Answer: (b).less
Q340.
For a reciprocating pump, the indicator diagram is the graph between the

a.

discharge and overall efficiency.

b.

volume swept by piston for one complete revolution and the pressure in the cylinder.

c.

angle swept by the crank pin at any instant and the discharge.

d.

none of these.

Discuss
Answer: (b).volume swept by piston for one complete revolution and the pressure in the cylinder.
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