Chapter 5 Flashcards
Define invert.
The lowest point of the channel inside a pipe.
Define anerobic.
Atmospheric or dissolved oxygen is not present.
What are the most common debris types found in sewer.
Grease Detergent Sticks Rags Plastic bags Silt
Define invert.
Lowest part of the channel inside a pipe.
Define barrel
Part of a manhole between the cone and the shelf.
Define air gap
Open vertical drop or empty space between a portable and non portable source.
What is the most effective tool for cleaning sewer lines
HVC
High velocity cleaning
What is the most common method of cleaning force mains?
Poly pig
Never handle the rod when it is under tension.
Twisted rods are very dangerous.
When do you use a hand rod
When the power rudder cannot be used.
Define ambient
Surrounding atmosphere.
Define angle of repose.
Natural slope of unsupported material.
Define anoxic
Aquatic environment without dissolved oxygen.
Define appurtenance
Machinery, etc. That allow systems to operate.
Hydrants, etc.
Define entrain
To trap bubbles in water. Mechanically or chemically.
