Cheat Sheet 1 Flashcards
What is the acceptable amount of unaccounted water in a distribution system
10%
What is the minimum water pressure required in a water system
20 PSI
What is the purpose of a foot valve
Foot valves are installed on the inlet of the pump suction pipe to keep suction line full of water
What are thrust blocks used for
Thrust blocks are used to prevent damage from internal pressures
When should a water main be disinfected?
After it is laid in the trench
What is tuberculation
Tuberculation is the development or formation of small mounds of corrosion on the inside of pipe
What is the most common type of distribution
The Grid System
What form of chlorine has the shortest shelf life
Liquid Chlorine
How can you determine lost water?
A water audit
What is caused when there is Negative Pressure
Back Siphonage
NPBS
What is it called when the water FLOW is higher on an unapproved water supply then the domestic system?
Back FLOW
What is the metallic compound used to prevent corrosion
ZINC
