Hydrants
What size is a fire hydrant line?
6"
What is used for corrosion control inside of a water tank?
Cathodic Protection
What are 3 types of pipe material used for mains?
DI
CI
AC
C900
What should be placed in a trench that is deeper than 5 ft?
Trench Box
If a pump does not hold its prime, what could be installed to help?
Foot Valve
What is min pressure for a fire hydrant?
20PSI
A pH of 6.7 would be considered?
Acidic
Should water mains cross above or below a sewer main?
Above
When responding to a chlorine gas leak, the responder should have a?
SCBA
What is the sample size for lead and copper analysis?
1,000 mg/L
The operating valve for a dry barrel fire hydrant is located?
In the base/foot.
Why must there be a vent on all water tanks?
Allow air to enter and exit the tank. Air lock mains.
What should be placed behind a change in direction in the main?
Thrust block
What is Type B fire extinguishers used for?
Gas, ect
Define the term drawdown?
Change in water elevation from the normal level to the pumping level
Why shouldn't you throttle a fire hydrant?
Weep holes are open.
Which type of valve should be used for filling an water tower?
Altitude Valve
Name 4 types of valves found in a distribution system or water plant.
Gate
Butterfly
Globe
Needle
Ball
When working in a confined space the oxygen level should never drop below?
19.5%
Chlorine Demand + Residual =
Demand
What is a wet barrel fire hydrant?
What is an example of an indicator organism?
Coliform
What are 3 ways you could create a water hammer in the system?
Hydrant, valve, pump
What should you check before entering a vault?
Air quality
Records of chemical analyses should be kept for?
10 years