Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
31 Cards in this Set
- Front
- Back
The water cycle is also known as |
Hydrological cycle |
|
What are the three cycles of water when it reaches land |
Evaporation Percolation Surface runoff |
|
The level at which water stands in a shallow well is called |
Water table |
|
What is the common name for sodium hydroxide |
Caustic soda |
|
What are the complexes formed from the reaction of ammonia and chlorine |
Chloramines |
|
What is the weight of matter in true solution in a volume of water called |
Dissolved solids |
|
Gpg is measured as one gpg is equal to ____mg/l or ppm |
17.1mg/l |
|
Soft water is any water that contains less than |
1gpg of hardness minerals |
|
Water hardness is defined as |
Calcium and magnesium salts in solution |
|
Most home supplies range in hardness from ____gpg to ____gpg |
3 gpg to 50 gpg |
|
Hardness is measured in terms of gpg, ppm or mg/l. To convert from ppm to USg divide ppm by _____ |
17.1 |
|
The term hardness has three designations applying to water |
Total hardness Temporary hardness Permanent hardness |
|
Very hard water is over ______mg/l |
200mg/l |
|
Permanent hardness occurs if water is heated above |
299F (148C) |
|
Temporary hardness occurs at what temperature |
140F (60C) |
|
Total hardness is defined as |
Total amount of temporary and permanent hardness |
|
What is the acceptable pH for potable water |
6.5 to 8.5 |
|
Acidic water can be treated with |
Neutralizing filter |
|
Turbidity can usually be removed by |
Sand filter or alum |
|
TDS should not be more than ____ppm |
500ppm |
|
TDS can be reduced by |
Reverse Osmosis Distillation |
|
People with high blood pressure should not drink water with more than ______mg/L |
20 |
|
The only method to remove sodium is |
Reverse osmosis |
|
Sulphur and H2S can be removed by |
Manganese green sand Chem free Chlorination |
|
To convert from ppm to grains/impgal divide ppm by |
14.3 |
|
A pH of 7 is considered |
Neutral |
|
A pH of 3 is considered |
Acidic |
|
Iron is harder to backwash from a softener because |
It is heavier |
|
Potassium permanganate chemically recharges greensand iron filter with |
Oxygen |
|
To remove waste and odor from water use |
Activated carbon filter |
|
What minerals are used to recharge a softener |
Sodium Potassium chloride |