Water Supply Flashcards
What are the 3 types of pipes in a water distribution system and their sizes?
- Primary feeder - 16 inch
- Secondary feeder - 12 inch
- Distributors - 8 inch
In a true gravity system, how much higher is the primary water source from the highest point in the water distribution system?
100ft
3 types of common valves?
- Post indicator (shows off/on)
- Stem & yoke (stem is raised when open)
- Non-indicator valves
Static Pressure is:
Stored potential energy in the pipe (when not flowing)
Normal Operating Pressure is:
Pressure in a water distribution system (during normal consumption demands)
Residual Pressure is:
The part of the total available pressure not used to overcome friction loss or gravity while forcing water through appliances
Flow Pressure/Velocity Pressure:
Forward velocity pressure created at a discharge opening while water is flowing
What type of hydrant has more GPMs? (dead-end vs. circulating)
Circulating hydrant because it receives water from multiple directions
Friction Loss is:
Part of total water pressure lost while forcing water through appliances
Dry hydrant vs dry barrel hydrant
Dry hydrant is basically a straw going into a water source.
Dry barrel hydrant is coming off a water main.
Hydrant colors vs fire flow (all have 20 psi)
LB - Light Blue = 1,500 GPM
G - Green = 1,000-1,499 GPM
O - Orange = 500-999 GPM
R- <=500 GPM
Self-supporting frameless portable water tank have a:
Collar (the top ring that spreads the tank out into place)
According to ___, tanker trucks carry ___?
NFPA 1901
1,000 Gallons
