ADEQ WATER TREATMENT 1 & 2 STUDY
GUIDE
1. What is the most common disinfection by product when adding chlorine to
water containing natural and inorganic matter?
Answer Chloroform
2. What will most probably cause taste and odors, slime, and filter clogging?
Answer -
Blue-Green Algae
3. Why can rapid sand filters handle higher filtration rates compared to slow
sand filters?
Answer Coarser Sand
4. Iron bacteria can interfere with because the bacteria produce
that prevents the stabilization chemicals from reaching the pipe
surface.
,Answer Stabilization, a slime layer
5. Hypochlorous acid is favored over hypochlorite ion when the pH is
and the temperature is .
Answer Low, Low
6. What filter has an unstratified media distribution?
Answer Slow sand filters
7. What is (are) the combined chlorine residual(s) at pH values ranging from 6.5
to 8.5?
Answer Monochloramine and dichloramine
8. When iron alone is treated using manganese greensand filters, the chlorine
feed rate should be about .
Answer 1.0 to 1.2 times the iron concentration
9. Chlorination of water that has high concentrations of natural organic matter
will produce
Answer THMs
,10. When disinfecting with chloramines, when can the ammonia be added to the
process?
Answer Before the chlorine, same time as the chlorine, or after the chlorine
11. What will settle out of the water in a short period of time?
Answer Very fine silt
12. Point-of-use activated carbon filters are most effective for removing
.
Answer Chlorine
13. Potassium permanganate is used as an oxidant for control of .
Answer Iron & manganese, organic precursors, tastes & odors
14. The USEPA Stage 1 Disinfectants and Disinfection Byproduct Rule estab-
lished maximum contaminant levels for haloacetic acids of .
Answer 60 ug/L
15. What must an operator periodically check regarding the cyclone separator
system?
, Answer Storage bin or hopper to empty of sand and grit
16. These types of chemicals chemically tie up scale-forming ions and are even-
tually ingested by consumers.
Answer Sequestering agents
GUIDE
1. What is the most common disinfection by product when adding chlorine to
water containing natural and inorganic matter?
Answer Chloroform
2. What will most probably cause taste and odors, slime, and filter clogging?
Answer -
Blue-Green Algae
3. Why can rapid sand filters handle higher filtration rates compared to slow
sand filters?
Answer Coarser Sand
4. Iron bacteria can interfere with because the bacteria produce
that prevents the stabilization chemicals from reaching the pipe
surface.
,Answer Stabilization, a slime layer
5. Hypochlorous acid is favored over hypochlorite ion when the pH is
and the temperature is .
Answer Low, Low
6. What filter has an unstratified media distribution?
Answer Slow sand filters
7. What is (are) the combined chlorine residual(s) at pH values ranging from 6.5
to 8.5?
Answer Monochloramine and dichloramine
8. When iron alone is treated using manganese greensand filters, the chlorine
feed rate should be about .
Answer 1.0 to 1.2 times the iron concentration
9. Chlorination of water that has high concentrations of natural organic matter
will produce
Answer THMs
,10. When disinfecting with chloramines, when can the ammonia be added to the
process?
Answer Before the chlorine, same time as the chlorine, or after the chlorine
11. What will settle out of the water in a short period of time?
Answer Very fine silt
12. Point-of-use activated carbon filters are most effective for removing
.
Answer Chlorine
13. Potassium permanganate is used as an oxidant for control of .
Answer Iron & manganese, organic precursors, tastes & odors
14. The USEPA Stage 1 Disinfectants and Disinfection Byproduct Rule estab-
lished maximum contaminant levels for haloacetic acids of .
Answer 60 ug/L
15. What must an operator periodically check regarding the cyclone separator
system?
, Answer Storage bin or hopper to empty of sand and grit
16. These types of chemicals chemically tie up scale-forming ions and are even-
tually ingested by consumers.
Answer Sequestering agents
