What is the function of a cation exchange unit?
Correct!
Wrong!
Which of the following components should a contractor use to attach the drain line from a reverse osmosis unit to the drain system?
Correct!
Wrong!
When installing hard coppr piping underground, what types of piping should a contractor use?
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Wrong!
What is the MAXIMUM fluoride level permitted in drinking water?
Correct!
Wrong!
What kind of solder is used for hard soldering?
Correct!
Wrong!
How many valves are required to make a water system bypass?
Correct!
Wrong!
Why is it important to install a ground bonding wire connection when using plastic pipe?
Correct!
Wrong!
To convert grains to ppm, you:
Correct!
Wrong!
Fractured resins are known as:
Correct!
Wrong!
Oxygen ________ corrosion.
Correct!
Wrong!
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