Civil Engineering (CE) Exam > Civil Engineering (CE) Questions > Which of the following is FALSE regarding tri...
Start Learning for Free
Which of the following is FALSE regarding triangular weir?
- a)The flow through the weir depends on the vertex angle
- b)Coefficient of discharge is fairly constant for all the heads
- c)Triangular weir is more effective under small discharges than a rectangular weir
- d)Ventilation of triangular weir is necessary
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
Which of the following is FALSE regarding triangular weir?a)The flow t...
Statement 4: False Ventilation of triangular weir is not necessary.
Weir:
A weir is a concrete or masonary structure, placed in an open channel over which the flow occurs. It is generally in the form of vertical wall, with a sharp edge at the top, running all the way across the open channel. The notch is of small size while the weir is of a bigger size. The notch is generally made of metallic plate while weir is made of concrete or masonary structure.
A weir is a concrete or masonary structure, placed in an open channel over which the flow occurs. It is generally in the form of vertical wall, with a sharp edge at the top, running all the way across the open channel. The notch is of small size while the weir is of a bigger size. The notch is generally made of metallic plate while weir is made of concrete or masonary structure.
Triangular weir:
The expression for the discharge over a triangular weir or notch is
From this expression flow through the weir depend upon the vertex angle (θ) and coefficient of discharge (Cd) is constant for all the heads, the value of Cd is nearly equal to 0.6.
The expression for the discharge over a triangular weir or notch is
From this expression flow through the weir depend upon the vertex angle (θ) and coefficient of discharge (Cd) is constant for all the heads, the value of Cd is nearly equal to 0.6.
Rectangular weir:
The expression for the discharge over a rectangular weir or notch is
The expression for the discharge over a rectangular weir or notch is
Advantage of triangular weir over rectangular weir:
A triangular weir is preferred to a rectangular weir due to following reason.
(1) The expression for discharge for a right angled V- notch or weir is very simple.
(2) For measuring low discharge, a triangular weir gives more accurate results than a rectangular weir.
(3) In case of triangular weir, only one reading, (H) is required for the computation of discharge.
(4) Ventilation of triangular weir is not necessary.
A triangular weir is preferred to a rectangular weir due to following reason.
(1) The expression for discharge for a right angled V- notch or weir is very simple.
(2) For measuring low discharge, a triangular weir gives more accurate results than a rectangular weir.
(3) In case of triangular weir, only one reading, (H) is required for the computation of discharge.
(4) Ventilation of triangular weir is not necessary.
Free Test
FREE
| Start Free Test |
Community Answer
Which of the following is FALSE regarding triangular weir?a)The flow t...
Triangular weirs are commonly used in open channel flow measurement. They have a triangular shape with a vertex angle at the top and the flow rate through the weir depends on various factors. Let's analyze each option to determine which one is false.
a) The flow through the weir depends on the vertex angle:
This statement is true. The flow rate through a triangular weir is directly influenced by the vertex angle. As the vertex angle increases, the flow rate also increases. This relationship is derived from the principles of fluid mechanics and can be calculated using the appropriate equations.
b) Coefficient of discharge is fairly constant for all the heads:
This statement is also true. The coefficient of discharge is a dimensionless factor that relates the actual flow rate through the weir to the theoretical flow rate. It takes into account the shape and size of the weir. For a triangular weir, the coefficient of discharge remains fairly constant for a range of heads or water levels upstream of the weir.
c) Triangular weir is more effective under small discharges than a rectangular weir:
This statement is true. Triangular weirs are generally more effective under small discharges compared to rectangular weirs. This is because triangular weirs have a narrower opening at the top, allowing for better control and measurement of low flow rates. Rectangular weirs, on the other hand, are more suitable for larger flow rates.
d) Ventilation of triangular weir is necessary:
This statement is FALSE. Triangular weirs do not require ventilation. Ventilation is a term used in the context of spillways, where air entrainment can occur due to the high velocity of flow over the weir. However, in the case of a triangular weir, the flow is not typically high enough to cause significant air entrainment. Therefore, ventilation is not necessary for triangular weirs.
In conclusion, the false statement regarding triangular weirs is option D) Ventilation of triangular weir is necessary. Triangular weirs do not require ventilation as the flow velocities are generally low and do not cause air entrainment.
a) The flow through the weir depends on the vertex angle:
This statement is true. The flow rate through a triangular weir is directly influenced by the vertex angle. As the vertex angle increases, the flow rate also increases. This relationship is derived from the principles of fluid mechanics and can be calculated using the appropriate equations.
b) Coefficient of discharge is fairly constant for all the heads:
This statement is also true. The coefficient of discharge is a dimensionless factor that relates the actual flow rate through the weir to the theoretical flow rate. It takes into account the shape and size of the weir. For a triangular weir, the coefficient of discharge remains fairly constant for a range of heads or water levels upstream of the weir.
c) Triangular weir is more effective under small discharges than a rectangular weir:
This statement is true. Triangular weirs are generally more effective under small discharges compared to rectangular weirs. This is because triangular weirs have a narrower opening at the top, allowing for better control and measurement of low flow rates. Rectangular weirs, on the other hand, are more suitable for larger flow rates.
d) Ventilation of triangular weir is necessary:
This statement is FALSE. Triangular weirs do not require ventilation. Ventilation is a term used in the context of spillways, where air entrainment can occur due to the high velocity of flow over the weir. However, in the case of a triangular weir, the flow is not typically high enough to cause significant air entrainment. Therefore, ventilation is not necessary for triangular weirs.
In conclusion, the false statement regarding triangular weirs is option D) Ventilation of triangular weir is necessary. Triangular weirs do not require ventilation as the flow velocities are generally low and do not cause air entrainment.
Attention Civil Engineering (CE) Students!
To make sure you are not studying endlessly, EduRev has designed Civil Engineering (CE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Civil Engineering (CE).
|
Explore Courses for Civil Engineering (CE) exam
|
|
Top Courses for Civil Engineering (CE)View all
Which of the following is FALSE regarding triangular weir?a)The flow through the weir depends on the vertex angleb)Coefficient of discharge is fairly constant for all the headsc)Triangular weir is more effective under small discharges than a rectangular weird)Ventilation of triangular weir is necessaryCorrect answer is option 'D'. Can you explain this answer?
Question Description
Which of the following is FALSE regarding triangular weir?a)The flow through the weir depends on the vertex angleb)Coefficient of discharge is fairly constant for all the headsc)Triangular weir is more effective under small discharges than a rectangular weird)Ventilation of triangular weir is necessaryCorrect answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Which of the following is FALSE regarding triangular weir?a)The flow through the weir depends on the vertex angleb)Coefficient of discharge is fairly constant for all the headsc)Triangular weir is more effective under small discharges than a rectangular weird)Ventilation of triangular weir is necessaryCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is FALSE regarding triangular weir?a)The flow through the weir depends on the vertex angleb)Coefficient of discharge is fairly constant for all the headsc)Triangular weir is more effective under small discharges than a rectangular weird)Ventilation of triangular weir is necessaryCorrect answer is option 'D'. Can you explain this answer?.
Which of the following is FALSE regarding triangular weir?a)The flow through the weir depends on the vertex angleb)Coefficient of discharge is fairly constant for all the headsc)Triangular weir is more effective under small discharges than a rectangular weird)Ventilation of triangular weir is necessaryCorrect answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Which of the following is FALSE regarding triangular weir?a)The flow through the weir depends on the vertex angleb)Coefficient of discharge is fairly constant for all the headsc)Triangular weir is more effective under small discharges than a rectangular weird)Ventilation of triangular weir is necessaryCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is FALSE regarding triangular weir?a)The flow through the weir depends on the vertex angleb)Coefficient of discharge is fairly constant for all the headsc)Triangular weir is more effective under small discharges than a rectangular weird)Ventilation of triangular weir is necessaryCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Which of the following is FALSE regarding triangular weir?a)The flow through the weir depends on the vertex angleb)Coefficient of discharge is fairly constant for all the headsc)Triangular weir is more effective under small discharges than a rectangular weird)Ventilation of triangular weir is necessaryCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Civil Engineering (CE).
Download more important topics, notes, lectures and mock test series for Civil Engineering (CE) Exam by signing up for free.
Here you can find the meaning of Which of the following is FALSE regarding triangular weir?a)The flow through the weir depends on the vertex angleb)Coefficient of discharge is fairly constant for all the headsc)Triangular weir is more effective under small discharges than a rectangular weird)Ventilation of triangular weir is necessaryCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Which of the following is FALSE regarding triangular weir?a)The flow through the weir depends on the vertex angleb)Coefficient of discharge is fairly constant for all the headsc)Triangular weir is more effective under small discharges than a rectangular weird)Ventilation of triangular weir is necessaryCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Which of the following is FALSE regarding triangular weir?a)The flow through the weir depends on the vertex angleb)Coefficient of discharge is fairly constant for all the headsc)Triangular weir is more effective under small discharges than a rectangular weird)Ventilation of triangular weir is necessaryCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Which of the following is FALSE regarding triangular weir?a)The flow through the weir depends on the vertex angleb)Coefficient of discharge is fairly constant for all the headsc)Triangular weir is more effective under small discharges than a rectangular weird)Ventilation of triangular weir is necessaryCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which of the following is FALSE regarding triangular weir?a)The flow through the weir depends on the vertex angleb)Coefficient of discharge is fairly constant for all the headsc)Triangular weir is more effective under small discharges than a rectangular weird)Ventilation of triangular weir is necessaryCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Civil Engineering (CE) tests.
|
|
Explore Courses for Civil Engineering (CE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup