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How is the average velocity along the vertical in a wide stream obtained?
- a)By averaging the velocities at 0.2 and 0.8 depth from surface.
- b)By measuring velocity at 0.6 depth below the surface
- c)By measuring the velocity at half the depth
- d)By measuring the velocity at 0.1 times the depth below the surface
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
How is the average velocity alongthe vertical in a wide streamobtained...
Average velocity in a wide stream can be calculated by measuring the velocity at half the depth.
Average velocity in a deep stream can be calculated by averaging the velocity at 0.2 and 0.8 times depth from surface.
Average velocity in a deep stream can be calculated by averaging the velocity at 0.2 and 0.8 times depth from surface.
Most Upvoted Answer
How is the average velocity alongthe vertical in a wide streamobtained...
Average velocity along the vertical in a wide stream is obtained by measuring the velocity at half the depth.
Explanation:
• The velocity of water in a stream varies at different depths due to the effects of friction and turbulence.
• To calculate the average velocity of a wide stream, it is necessary to measure the velocity at different depths and then take an average.
• The velocity at the surface of the stream will be higher due to the effects of wind and other factors, while the velocity at the bottom will be lower due to friction with the bed.
• Therefore, measuring the velocity at a particular depth is more representative of the average velocity than measuring at the surface or the bottom.
• To obtain the most accurate average velocity, the velocity should be measured at a depth that is halfway between the surface and the bottom.
• This is because the velocity profile of a stream is typically parabolic, with the maximum velocity occurring at the surface and decreasing linearly towards the bottom.
• Measuring the velocity at half the depth gives a more representative average velocity because it takes into account the entire range of velocities in the stream.
• The velocity at half the depth can be calculated by measuring the total depth of the stream and then dividing by two.
• The velocity can then be measured at this depth using a flow meter or other velocity measuring device.
• By repeating this process at multiple locations in the stream, an average velocity can be calculated that is representative of the entire stream.
Therefore, the correct answer is option 'C' - By measuring the velocity at half the depth.
Explanation:
• The velocity of water in a stream varies at different depths due to the effects of friction and turbulence.
• To calculate the average velocity of a wide stream, it is necessary to measure the velocity at different depths and then take an average.
• The velocity at the surface of the stream will be higher due to the effects of wind and other factors, while the velocity at the bottom will be lower due to friction with the bed.
• Therefore, measuring the velocity at a particular depth is more representative of the average velocity than measuring at the surface or the bottom.
• To obtain the most accurate average velocity, the velocity should be measured at a depth that is halfway between the surface and the bottom.
• This is because the velocity profile of a stream is typically parabolic, with the maximum velocity occurring at the surface and decreasing linearly towards the bottom.
• Measuring the velocity at half the depth gives a more representative average velocity because it takes into account the entire range of velocities in the stream.
• The velocity at half the depth can be calculated by measuring the total depth of the stream and then dividing by two.
• The velocity can then be measured at this depth using a flow meter or other velocity measuring device.
• By repeating this process at multiple locations in the stream, an average velocity can be calculated that is representative of the entire stream.
Therefore, the correct answer is option 'C' - By measuring the velocity at half the depth.
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Community Answer
How is the average velocity alongthe vertical in a wide streamobtained...
As answer B is more correct because wide stream has shallow depth and for shallow depth velocity is obtained at 0.6 depth
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How is the average velocity alongthe vertical in a wide streamobtained?a)By averaging the velocities at0.2 and 0.8 depth from surface.b)By measuring velocity at 0.6depth below the surfacec)By measuring the velocity at half the depthd)By measuring the velocity at 0.1times the depth below the surfaceCorrect answer is option 'C'. Can you explain this answer?
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How is the average velocity alongthe vertical in a wide streamobtained?a)By averaging the velocities at0.2 and 0.8 depth from surface.b)By measuring velocity at 0.6depth below the surfacec)By measuring the velocity at half the depthd)By measuring the velocity at 0.1times the depth below the surfaceCorrect answer is option 'C'. 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 How is the average velocity alongthe vertical in a wide streamobtained?a)By averaging the velocities at0.2 and 0.8 depth from surface.b)By measuring velocity at 0.6depth below the surfacec)By measuring the velocity at half the depthd)By measuring the velocity at 0.1times the depth below the surfaceCorrect answer is option 'C'. 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 How is the average velocity alongthe vertical in a wide streamobtained?a)By averaging the velocities at0.2 and 0.8 depth from surface.b)By measuring velocity at 0.6depth below the surfacec)By measuring the velocity at half the depthd)By measuring the velocity at 0.1times the depth below the surfaceCorrect answer is option 'C'. Can you explain this answer?.
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