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Exam (elaborations)

Storm Water Management Exam 2 Questions And Answers

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  • Storm Water Drainage

Storm Water Management Exam 2 Questions And Answers What does Reynolds Number (Re) identify Characteristic of the flow Laminar: Re < 2000 Turbulent: Re > 4000 Transitional: 4000 > Re > 2000 Units for Head Energy / Unit Weight What makes up head loss? Frictional and Local Losses...

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  • October 13, 2024
  • 8
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Storm Water Drainage
  • Storm Water Drainage
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UpperClass
Storm Water Management Exam 2 Questions
And Answers

What does Reynolds Number (Re) identify Characteristic of the flow




Laminar: Re < 2000

Turbulent: Re > 4000

Transitional: 4000 > Re > 2000




Units for Head Energy / Unit Weight




What makes up head loss? Frictional and Local Losses




Frictional: Forces between liquid and solid barrier.




Local: Disruptions at physical features like bends and size changes.




What is the Energy Grade Line (EGL)? Distance from the horizontal datum to the total

head.

, Storm Water Management Exam 2 Questions
And Answers
What is the Hydraulic Grade Line (HGL)? Distance from EGL to vertical head.




What are friction losses dependent on? Reynold's Number




Where do local losses occur? At points where flow is disrupted within a pipe such as a

bend or valve.




What is surcharge? Pipes exceeding their maximum flow.




Two types of surcharge? Manhole Surcharge and Pipe Surcharge




What is the value of a minimum velocity for a sewer pipe? To establish self cleansing

properties.




Conditions dictating max flow? Energy losses at bends


Hydraulic Jumps

Cavitation

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