Storm Water Management Exam 2 Questions And Answers
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Course
Storm Water Drainage
Institution
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...
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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