Hydraulics MCQs

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

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

Hydraulics MCQs | Page 8 of 29

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Q71.
Mach number is the ratio of inertia force to

a.

viscosity

b.

surface tension

c.

gravitational force

d.

elasticity.

Discuss
Answer: (d).elasticity.
Q72.
The main assumption of Bernoulli's equation is :

a.

The velocity of energy of liquid particle, across any cross-section of a pipe is uniform

b.

No external force except the gravity acts on the liquid

c.

There is no loss of energy of the liquid while flowing

d.

All the above.

Discuss
Answer: (d).All the above.
Q73.
For critical depth of flow of water in open channels, fc the specific energy must be :

a.

minimum

b.

maximum

c.

average of maximum and minimum

d.

None of these.

Discuss
Answer: (a).minimum
Q74.
When water flows over a rectangular suppressed weir, the negative pressure created beneath the nappe

a.

increases the discharge

b.

decreases the discharge

c.

does not effect the discharge

d.

none of these.

Discuss
Answer: (a).increases the discharge
Q75.
Barometres are used to measure

a.

pressure in water channels, pipes etc.

b.

difference in pressure at two points

c.

atmospheric pressure

d.

very low pressure

Discuss
Answer: (c).atmospheric pressure
Q76.
For most economical rectangular section of a channel, the depth is kept

a.

one-fourth of the width

b.

three times the hydraulic radius

c.

half the width

d.

hydraulic mean depth

Discuss
Answer: (c).half the width
Q77.
In a centrifugual pump casing, the flow of water leaving the impeller, is

a.

rectilinear flow

b.

radial flow

c.

free vortex motion

d.

forced vertex.

Discuss
Answer: (c).free vortex motion
Q78.
In fluids, steady flow occurs when

a.

conditions of flow change steadily with time

b.

conditions of flow do not change with time at a point

c.

conditions of flow remain the same at adjacent point

d.

velocity vector remains constant at a point.

Discuss
Answer: (b).conditions of flow do not change with time at a point
Q79.
For the most economical trapezoidal open channel,

a.

half of the top width must be equal to one of the sloping sides

b.

the hydraulic mean depth must be equal to half the depth of flow

c.

the semicircle drawn with top width as diameter must touch the three sides of the channel

d.

All of these.

Discuss
Answer: (d).All of these.
Q80.
Hydraulic ram is a device

a.

for lifting water without an electric motor

b.

for accelerating water flow

c.

for lifting heavy loads

d.

none of these.

Discuss
Answer: (a).for lifting water without an electric motor
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