Unit 6 - Wastewater Collection Flashcards
List the path wastewater takes from a house to the treatment plant
Sanitary service > Branch > Main > Trunk
Wastewater velocity should be between
______ to _______ m/s
0.6 to 3.0 m/s
An excessive slope in a sewer service may cause what effect on the sewer pipe
Excessive wear
A combined storm and sewer collection system has this disadvantage
Excess flow could be diverted into environment without treatment
PVC is the type of pipe used for which part or parts of the wastewater line
Lateral and branch lines
Manholes must be placed with a maximum distance of how many meters apart
150 meters
Why are gate valves preferred in pressurized force mains
Gate mechanism is out of flow while valve is in the open position
What is the best cleaning method for a grease accumulation in a lateral main?
High velocity jetting
Scooter and Kite cleaning tools are best used in what size pipe?
Pipes greater than 45cm in diameter
Which of these cleaning methods can best remove large amounts of sand from large diameter lines?
A - Repairs
B - High Velocity Cleaner
C - Bailing
D - Approved chemicals
B: Bailing
True or False:
On a typical fire hydrant placement, all drain holes should be unobstructed and free to drain
True
What is the minimum distance between Storm, Sanitary, and Water Service in a typical domestic service configuration?
300mm
