Hydraulics and Fluid Mechanics MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Hydraulics and Fluid Mechanics, a fundamental topic in the field of Mechanical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Hydraulics and 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 Hydraulics and Fluid Mechanics mcq questions that explore various aspects of Hydraulics and Fluid Mechanics problems. Each MCQ is crafted to challenge your understanding of Hydraulics and Fluid Mechanics principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Mechanical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Hydraulics and Fluid Mechanics MCQs are your pathway to success in mastering this essential Mechanical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Hydraulics and 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 Hydraulics and Fluid Mechanics knowledge to the test? Let's get started with our carefully curated MCQs!

Hydraulics and Fluid Mechanics MCQs | Page 20 of 39

Discover more Topics under Mechanical Engineering

Q191.
The ratio of the inertia force to the viscous force is called

a.

Reynold's number

b.

Froude's number

c.

Weber's number

d.

Euler's number

Discuss
Answer: (a).Reynold's number
Q192.
A flow whose streamline is represented by a straight line, is called __________ dimensional flow.

a.

one

b.

two

c.

three

d.

four

Discuss
Answer: (a).one
Q193.
The absolute pressure is equal to

a.

gauge pressure + atmospheric pressure

b.

gauge pressure - atmospheric pressure

c.

atmospheric pressure - gauge pressure

d.

gauge pressure - vacuum pressure

Discuss
Answer: (a).gauge pressure + atmospheric pressure
Q194.
When the pressure intensity at a point is more than the local atmospheric pressure, then the difference of these two pressures is called

a.

gauge pressure

b.

absolute pressure

c.

positive gauge pressure

d.

vacuum pressure

Discuss
Answer: (c).positive gauge pressure
Q195.
The hammer blow in pipes occurs when

a.

there is excessive leakage in the pipe

b.

the pipe bursts under high pressure of fluid

c.

the flow of fluid through the pipe is suddenly brought to rest by closing of the valve

d.

the flow of fluid through the pipe is gradually brought to rest by closing of the valve

Discuss
Answer: (c).the flow of fluid through the pipe is suddenly brought to rest by closing of the valve
Q196.
When a body is placed over a liquid, it will sink down if

a.

gravitational force is equal to the upthrust of the liquid

b.

gravitational force is less than the upthrust of the liquid

c.

gravitational force is more than the upthrust of the liquid

d.

none of the above

Discuss
Answer: (c).gravitational force is more than the upthrust of the liquid
Q197.
When a cylindrical vessel of radius (r) containing liquid is revolved about its vertical axis ฯ‰ rad/s, then depth of parabola which the liquid assumes is

a.

ฯ‰.r/2g

b.

ฯ‰².r²/2g

c.

ฯ‰.r/4g

d.

ฯ‰².r²/4g

Discuss
Answer: (b).ฯ‰².r²/2g
Q198.
A manometer is used to measure

a.

atmospneric pressure

b.

pressure in pipes and channels

c.

pressure in venturimeter

d.

difference of pressures between two points in a pipe

Discuss
Answer: (b).pressure in pipes and channels
Q199.
The product of mass and accelaration of flowing liquid is called

a.

inertia force

b.

viscous force

c.

gravity force

d.

pressure force

Discuss
Answer: (a).inertia force
Q200.
The discharge through a wholly drowned orifice is given by (where H1 = Height of water (on the upstream side) above the top of the orifice, H2 = Height of water (on the downstream side) above the bottom of the orifice, and H = Difference between two water levels on either side of the orifice)

a.

Q = Cd × bHโ‚ × โˆš(2gh)

b.

Q = Cd × bH2 × โˆš(2gh)

c.

Q = Cd × b (H2 - H1) × โˆš(2gh)

d.

Q = Cd × bH × โˆš(2gh)

Discuss
Answer: (c).Q = Cd × b (H2 - H1) × โˆš(2gh)
Page 20 of 39