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 27 of 39

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Q261.
The dynamic viscosity of gases __________ with rise in temperature.

a.

remain unaffected

b.

increases

c.

decreases

d.

None of these

Discuss
Answer: (b).increases
Q262.
A flow in which the quantity of liquid flowing per second is constant, is called __________ flow.

a.

steady

b.

streamline

c.

turbulent

d.

unsteady

Discuss
Answer: (a).steady
Q263.
The depth of centre of pressure (h) for a vertically immersed surface from the liquid surface is given by (where IG = Moment of inertia of the immersed surface about horizontal axis through its centre of gravity, A = Area of immersed surface, and x = Depth of centre of gravity of the immersed surface from the liquid surface)

a.

(IG/AxΜ…) - xΜ…

b.

(IG/xΜ…) - AxΜ…

c.

(AxΜ…/IG) + xΜ…

d.

(IG/AxΜ…) + xΜ…

Discuss
Answer: (d).(IG/AxΜ…) + xΜ…
Q264.
The velocity at which the turbulent flow starts is known as higher critical velocity.

a.

Yes

b.

No

c.

Can't say

d.

None of these

Discuss
Answer: (a).Yes
Q265.
According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)

a.

Cd(L - nH)2gH

b.

Cd(L - 0.1nH)2gH^3/2

c.

Cd(L - nH)2gH^2

d.

Cd(L - 0.2nH)2gH^5/2

Discuss
Answer: (b).Cd(L - 0.1nH)2gH^3/2
Q266.
The specific weight is also known as weight density.

a.

Correct

b.

Incorrect

c.

Can't say

d.

None of these

Discuss
Answer: (a).Correct
Q267.
In a lockgate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and Ξ± = Inclination of the gate with the normal to the side of the lock)

a.

p/sinΞ±

b.

2p/sinΞ±

c.

P / 2sinΞ±

d.

p/sin (Ξ±/2)

Discuss
Answer: (c).P / 2sinΞ±
Q268.
The mercury does not wet the glass. This is due to the property of the liquid known as

a.

cohesion

b.

adhesion

c.

viscosity

d.

surface tension

Discuss
Answer: (d).surface tension
Q269.
The coefficient of discharge in case of internal mouthpiece is __________ that of external mouthpiece.

a.

less than

b.

more than

c.

Can't say

d.

None of these

Discuss
Answer: (a).less than
Q270.
The centre of pressure for a vertically immersed surface lies at a distance equal to __________ the centre of gravity.

a.

below

b.

above

c.

below

d.

above

Discuss
Answer: (c).below
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