Civil Engineering (CE) Exam > Civil Engineering (CE) Questions > Pressure drop in a 100 mm diameter horizontal...
Start Learning for Free
Pressure drop in a 100 mm diameter horizontal pipe is 50 kPa over a length of 10 m. The shear stress at the pipe wall is
- a)0.25 kPa
- b)0.125 kPa
- c)0.50 kPa
- d)25.0 kPa
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Pressure drop in a 100 mm diameter horizontal pipe is 50 kPa over a le...
Free Test
FREE
| Start Free Test |
Community Answer
Pressure drop in a 100 mm diameter horizontal pipe is 50 kPa over a le...
Given data:
Diameter of the pipe = 100 mm = 0.1 m
Length of the pipe = 10 m
Pressure drop = 50 kPa
To find: Shear stress at the pipe wall
Formula used:
Pressure drop = (friction factor x density x velocity^2 x length) / (2 x diameter)
Shear stress = (friction factor x density x velocity^2) / 2
Calculation:
1. Finding velocity
Pressure drop = (friction factor x density x velocity^2 x length) / (2 x diameter)
Rearranging for velocity, we get
Velocity^2 = (2 x diameter x pressure drop) / (friction factor x density x length)
Velocity^2 = (2 x 0.1 x 50,000) / (friction factor x 1000 x 10)
Velocity^2 = 10,000 / (friction factor x 100)
Velocity^2 = 100 / friction factor
Velocity = sqrt(100 / friction factor)
2. Finding friction factor
To find the friction factor, we need to know the type of flow. Since it is not given, we assume it to be turbulent.
Using the Colebrook equation, we get
1 / sqrt(friction factor) = -2 log(2.51 / (Re sqrt(friction factor)) + k / (3.71 D))
Here, k is the roughness height and D is the diameter of the pipe.
Assuming k = 0.03 mm for commercial steel pipes, we get
Re = (velocity x diameter x density) / viscosity
Re = (sqrt(100 / friction factor) x 0.1 x 1000) / 0.001
Re = 10^6 / sqrt(friction factor)
Substituting this in the Colebrook equation and solving iteratively, we get
Friction factor = 0.0205
3. Finding shear stress
Shear stress = (friction factor x density x velocity^2) / 2
Shear stress = (0.0205 x 1000 x 100 / friction factor) / 2
Shear stress = 0.125 kPa
Therefore, the shear stress at the pipe wall is 0.125 kPa (option B).
Diameter of the pipe = 100 mm = 0.1 m
Length of the pipe = 10 m
Pressure drop = 50 kPa
To find: Shear stress at the pipe wall
Formula used:
Pressure drop = (friction factor x density x velocity^2 x length) / (2 x diameter)
Shear stress = (friction factor x density x velocity^2) / 2
Calculation:
1. Finding velocity
Pressure drop = (friction factor x density x velocity^2 x length) / (2 x diameter)
Rearranging for velocity, we get
Velocity^2 = (2 x diameter x pressure drop) / (friction factor x density x length)
Velocity^2 = (2 x 0.1 x 50,000) / (friction factor x 1000 x 10)
Velocity^2 = 10,000 / (friction factor x 100)
Velocity^2 = 100 / friction factor
Velocity = sqrt(100 / friction factor)
2. Finding friction factor
To find the friction factor, we need to know the type of flow. Since it is not given, we assume it to be turbulent.
Using the Colebrook equation, we get
1 / sqrt(friction factor) = -2 log(2.51 / (Re sqrt(friction factor)) + k / (3.71 D))
Here, k is the roughness height and D is the diameter of the pipe.
Assuming k = 0.03 mm for commercial steel pipes, we get
Re = (velocity x diameter x density) / viscosity
Re = (sqrt(100 / friction factor) x 0.1 x 1000) / 0.001
Re = 10^6 / sqrt(friction factor)
Substituting this in the Colebrook equation and solving iteratively, we get
Friction factor = 0.0205
3. Finding shear stress
Shear stress = (friction factor x density x velocity^2) / 2
Shear stress = (0.0205 x 1000 x 100 / friction factor) / 2
Shear stress = 0.125 kPa
Therefore, the shear stress at the pipe wall is 0.125 kPa (option B).
|
Explore Courses for Civil Engineering (CE) exam
|
|
Top Courses for Civil Engineering (CE)View all
Question Description
Pressure drop in a 100 mm diameter horizontal pipe is 50 kPa over a length of 10 m. The shear stress at the pipe wall isa)0.25 kPab)0.125 kPac)0.50 kPad)25.0 kPaCorrect answer is option 'B'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Pressure drop in a 100 mm diameter horizontal pipe is 50 kPa over a length of 10 m. The shear stress at the pipe wall isa)0.25 kPab)0.125 kPac)0.50 kPad)25.0 kPaCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Pressure drop in a 100 mm diameter horizontal pipe is 50 kPa over a length of 10 m. The shear stress at the pipe wall isa)0.25 kPab)0.125 kPac)0.50 kPad)25.0 kPaCorrect answer is option 'B'. Can you explain this answer?.
Pressure drop in a 100 mm diameter horizontal pipe is 50 kPa over a length of 10 m. The shear stress at the pipe wall isa)0.25 kPab)0.125 kPac)0.50 kPad)25.0 kPaCorrect answer is option 'B'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Pressure drop in a 100 mm diameter horizontal pipe is 50 kPa over a length of 10 m. The shear stress at the pipe wall isa)0.25 kPab)0.125 kPac)0.50 kPad)25.0 kPaCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Pressure drop in a 100 mm diameter horizontal pipe is 50 kPa over a length of 10 m. The shear stress at the pipe wall isa)0.25 kPab)0.125 kPac)0.50 kPad)25.0 kPaCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Pressure drop in a 100 mm diameter horizontal pipe is 50 kPa over a length of 10 m. The shear stress at the pipe wall isa)0.25 kPab)0.125 kPac)0.50 kPad)25.0 kPaCorrect answer is option 'B'. 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 Pressure drop in a 100 mm diameter horizontal pipe is 50 kPa over a length of 10 m. The shear stress at the pipe wall isa)0.25 kPab)0.125 kPac)0.50 kPad)25.0 kPaCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Pressure drop in a 100 mm diameter horizontal pipe is 50 kPa over a length of 10 m. The shear stress at the pipe wall isa)0.25 kPab)0.125 kPac)0.50 kPad)25.0 kPaCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for Pressure drop in a 100 mm diameter horizontal pipe is 50 kPa over a length of 10 m. The shear stress at the pipe wall isa)0.25 kPab)0.125 kPac)0.50 kPad)25.0 kPaCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of Pressure drop in a 100 mm diameter horizontal pipe is 50 kPa over a length of 10 m. The shear stress at the pipe wall isa)0.25 kPab)0.125 kPac)0.50 kPad)25.0 kPaCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Pressure drop in a 100 mm diameter horizontal pipe is 50 kPa over a length of 10 m. The shear stress at the pipe wall isa)0.25 kPab)0.125 kPac)0.50 kPad)25.0 kPaCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Civil Engineering (CE) tests.
|
|
Explore Courses for Civil Engineering (CE) exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup