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 18 of 29

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Q171.
Pick up the correct statement from the following :

a.

Discharge over a triangular notch is proportional to H^5/2

b.

Discharge over a rectangular notch is proportional to H^3/2

c.

Both (a) and (b)

d.

Neither (a) nor (b).

Discuss
Answer: (c).Both (a) and (b)
Q172.
The flow in open channel is said to be subcritical if the Froude number is

a.

less than 1.0

b.

equal to 1.0

c.

greater than 1.0

d.

none.

Discuss
Answer: (a).less than 1.0
Q173.
In C.G.S. system the unit of visocity is

a.

dyne

b.

joule

c.

poise

d.

Newton

Discuss
Answer: (c).poise
Q174.
The ratio of the percentage error in the discharge and percentage error in the measurement of head, over rectangular notch, is

a.

1/2

b.

2/3

c.

3/2

d.

3/4

Discuss
Answer: (c).3/2
Q175.
In a short cylindercial external mouthpiece, the venacontracta occurs at a distance from the outlet of orifice equal to

a.

diameter of the orifice

b.

one-fourth the diameter of the orifice

c.

one-third the diameter of the orifice

d.

two-third the diameter of the orifice

Discuss
Answer: (b).one-fourth the diameter of the orifice
Q176.
If the pressure at the inlet of a pipe is 90 kg/cm² and pressure drop over the pipe line is 10 kg/cm², the efficiency of transmission, is

a.

66.6%

b.

77.7%

c.

55.5%

d.

88.8%.

Discuss
Answer: (d).88.8%.
Q177.
Pick up the incorrect statement from to following regarding triangular notch :

a.

For measuring low discharge, it gives more accurate result

b.

Only one reading (i.e. H) is required for computation of discharge

c.

Ventilation is necessary

d.

None of these.

Discuss
Answer: (c).Ventilation is necessary
Q178.
The flow in a channel is said to be non-uniform, if

a.

free water surface of an open channel is not parallel to the bed of channel

b.

head needed to overcome frictional reistance is less than the drop in elevation of channel bed

c.

head needed to overcome frictional resistance is more than the drop in elevation of channel bed

d.

all the above.

Discuss
Answer: (d).all the above.
Q179.
In steady flow, which one of the following changes with time

a.

velocity

b.

pressure

c.

density

d.

none of these.

Discuss
Answer: (d).none of these.
Q180.
The notch angle for maximum discharge over a triangular notch, is

a.

30°

b.

60°

c.

90°

d.

120°

Discuss
Answer: (c).90°
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