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 36 of 77

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Q351.
The discharge through a V-notch weir varies as

a.

H^3/2

b.

H^1/2

c.

H^5/2

d.

H^2/3

Discuss
Answer: (c).H^5/2
Q352.
Water flow rate in a pipe of 3.5 metres diameter can be most economically and conveniently measured by a/an

a.

pitot tube

b.

venturimeter

c.

orificemeter

d.

rotameter

Discuss
Answer: (a).pitot tube
Q353.
The specific speed of a pump is defined as the speed of a unit of such a size, that it

a.

delivers unit discharge at unit head.

b.

requires unit power for unit head.

c.

delivers unit discharge at unit power.

d.

none of these.

Discuss
Answer: (a).delivers unit discharge at unit head.
Q354.
When the pipe Reynold's number is 6000, the flow is generally

a.

viscous

b.

laminar

c.

turbulent

d.

transition

Discuss
Answer: (c).turbulent
Q355.
With a constant diameter impeller of a centrifugal pump

a.

its capacity varies directly as the square of speed.

b.

head varies as the square of speed.

c.

horsepower input varies as the square of speed.

d.

head varies as the speed.

Discuss
Answer: (b).head varies as the square of speed.
Q356.
For water, when the pressure increases, the viscosity

a.

also increases

b.

decreases

c.

remains constant

d.

first decreases, and then increases

Discuss
Answer: (d).first decreases, and then increases
Q357.
Location of vena-contracta in an orificemeter does not depend upon the

a.

type of orifice.

b.

density, viscosity & compressibility of the fluid.

c.

ratio of pipe diameter to orifice diameter.

d.

pipe roughness.

Discuss
Answer: (a).type of orifice.
Q358.
At low Reynolds number

a.

viscous forces are unimportant.

b.

viscous forces control.

c.

viscous forces control and inertial forces are unimportant.

d.

gravity forces control.

Discuss
Answer: (c).viscous forces control and inertial forces are unimportant.
Q359.
For laminar flow through a closed conduit

a.

Vโ‚˜โ‚โ‚“ = 2Vโ‚แตฅ

b.

Vโ‚˜โ‚โ‚“ = Vโ‚แตฅ

c.

Vโ‚˜โ‚โ‚“ = 1.5Vโ‚แตฅ

d.

Vโ‚˜โ‚โ‚“ = 0.5Vโ‚แตฅ

Discuss
Answer: (a).Vโ‚˜โ‚โ‚“ = 2Vโ‚แตฅ
Q360.
In Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass varies as the __________ of its diameter.

a.

inverse

b.

square root

c.

second power

d.

first power

Discuss
Answer: (b).square root
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