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 14 of 29

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Q131.
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
Q132.
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
Q133.
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
Q134.
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
Q135.
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
Q136.
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.
Q137.
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
Q138.
Gauge pressure is

a.

absolute pressure - atmospheric pressure

b.

absolute pressure + atmospheric pressure

c.

atmospheric pressure - absolute pressure

d.

none of these.

Discuss
Answer: (a).absolute pressure - atmospheric pressure
Q139.
If the forces are due to inertia and gravity, and frictional resistance plays only a minor role, the design of the channels is made by comparing

a.

Reynold number

b.

Froude number

c.

Weber number

d.

Mach number.

Discuss
Answer: (b).Froude number
Q140.
The discharge over a Cipolletti weir of length 2.185 m when the head over the weir is 1 m, is

a.

2.0 m³

b.

2.5 m³

c.

3.0 m³

d.

4.0 m³.

Discuss
Answer: (d).4.0 m³.
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