im wett
To become a D-class water/wastewater operator, you need?
A year of work experience or a certificate from an accredited program
define hydraulics
The study of fluids in motion under pressure
What type of hydrant is most commonly used in Minnesota?
Dry Barrel
What is the MCL for Fluoride?
4.0 mg/L
Pressure tanks should be used when a water supply serves fewer than how many homes?
50 Homes
How many years of work experience do you need before you can take your C-class license
3 years total
1 foot of head is equal to what psi?
0.433psi
All new hydrants must be installed on at least what size pipe?
6+ Inches
What are HAA5 and TTHM an example of?
Disinfection Byproducts
What is the vertical supply pipe to an elevated tank called?
Riser Pipe
To pass an operator exam, you need what percentage %
70%
Velocity is equal to
What is the standard PSI in a water system?
50-60 PSI
What is the MCL for lead?
0.015 mg/L
What valve automatically shuts off when the water level in an elevated tank reaches a preset elevation
Altitude valve
In the state of Minnesota, who is in charge of enforcing wastewater regulations?
MPCA
head is measured in?
feet
What is the minimum PSI during normal conditions?
35 PSI
What is the maximum level for Chlorine residuals?
4ppm
Before putting a storage tank in service, it should be disinfected at a chlorine concentration of how many PPM
50 PPM
When is the last day of the WETT program?
June 12
Absolute pressure is equal to?
14.7
What is the minimum PSI during fire conditions?
20 PSI
Which MCL can be assessed by a quantitative test instead of a qualitative one?
Total Coliform
How much water should be stored in a tank at any given time?
At least 1 days worth