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19 Cards in this Set
- Front
- Back
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Water is considered |
The universal solvent |
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Surface water must be _____ before drinking |
Treaded |
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What water may or may not be safe to drink unfiltered |
Ground water |
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Contact tank requires how much time when adding chlorine |
20 min |
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Max turbidity in pitiable water |
1 NTU |
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What’s the most common coagulant |
Alum |
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Water leaving the contact tank should have how much chlorine |
0.5-1 ppm of chlorine (CL2) |
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Effluent is |
A liquid leaving a process |
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Influent is |
A liquid entering a process |
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Measuring hardness is done in |
Grains/ gal |
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Hard water = |
1 GPG greater |
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Maximum amount of H2S gas in pitiable water |
0.05 ppm |
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What is regeneration |
The recharge of of a water softener |
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Reverse osmosis will deal with everything but |
Bacteria |
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When should water be tested |
Prior to initial hookup Yearly Anytime there is a noticeable change |
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Types of hardness |
Permanent hardness Temporary harness Total hardness |
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Perm hardness |
148•c or 299•f |
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Max total hardness |
3.5 gpg |
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Uv does what to bacteria |
Destroys the DNA so it can’t reproduce |
