Wastewater B Test
Study online at https://quizlet.com/_gd4gq8
1. Percent of volatile solids nor- 70-80%
mally in sludge
2. D.O. levels in a primary clarifier 0.5-1.0 MG/L
3. Why are precautionary mea- undertow and turbulence
sures needed around an aera-
tion basin?
4. O.S.H.A. approved trench narrow excavation in which the depth is greater than the
width; the width must be less than 15 feet
5. What causes bulking? 1. Excessive hydraulic loading,
2. Solids not promptly removed from clarifier
3. Inadequate weir length
4. Improper ratio of depth to surface area of the final clarifier
6. What are the 5 elements of a 1. Floor
trickling filter? 2. under drain
3. Wall containing the filter bed
4. media
5. filter distribution arm
7. When and where are monthly by the 20th of the following month; submitted to Austin
reports submitted?
8. How and when do you report a as soon as possible by phone within 24 hours; followed by in
bypass? writing within 5 working days
9. What are the 5 events of 1. Pollution
stream purification? 2. Degradation
3. Decomposition
, Wastewater B Test
Study online at https://quizlet.com/_gd4gq8
4. Recovery
5. Clear
10. What are the 2 methods for 1. Winkler method
measuring D.O.? 2. meter
11. What is needed for good com- good listening
munication?
12. How much chlorine gas comes 450
from one part liquid chlorine?
13. What does the "F and M" stand Food to Microorganism
for in the F:M Ratio?
14. What feeds the nitrification or- fatty volatile acids
ganisms?
15. An explosive atmosphere con- 1. Oxygen
tains what 2 things? 2. flammable gas vapor or dust
16. How deep should the drying 8-12 inches
bed sludge be?
17. Why is a low flow rated impor- to prevent undigested sludge from breaking through the ripe
tant when filling a drying bed? sludge blanket in the digester
18. Under a microscope what 2 or- 1. SILIATE
ganizms should be predomi- 2. rotifers
nant?
19. The detention time in a con- Less
tact stabilization plant is more
, Wastewater B Test
Study online at https://quizlet.com/_gd4gq8
or less than other extended
aeration plants?
20. What 2 things are chlorine 1. disinfection
used for? 2. odor control
21. What will a leaking chlorine freeze up
container do?
22. How are plant goals best ac- planning, PM, records, analysis
complished?
23. What is the function of the bot- turns the pump off
tom float in a lift station?
24. What must be used when con- an air gap between the pump and the water line twice the
necting a potable water supply diameter of the water line or at least 1", whichever is greater
to a lift station?
25. What is the problem if the su- 1. Bulking
pernatant in the settleometer 2. An equipment malfuntion such as a plugged R.A.S. or W.A.S.
is clear but the effluent is not? line
3. problem in secondary clarifier
26. Why does flow through a clari- to keep floc particles from coming over the wiers
fier move up slowly?
27. when should a manhole be at least every 500 feet or whenever necessary
placed?
28. Where should the sludge in bottom quarter
the clarifier be kept in the ac-
tivated sludge process?
Study online at https://quizlet.com/_gd4gq8
1. Percent of volatile solids nor- 70-80%
mally in sludge
2. D.O. levels in a primary clarifier 0.5-1.0 MG/L
3. Why are precautionary mea- undertow and turbulence
sures needed around an aera-
tion basin?
4. O.S.H.A. approved trench narrow excavation in which the depth is greater than the
width; the width must be less than 15 feet
5. What causes bulking? 1. Excessive hydraulic loading,
2. Solids not promptly removed from clarifier
3. Inadequate weir length
4. Improper ratio of depth to surface area of the final clarifier
6. What are the 5 elements of a 1. Floor
trickling filter? 2. under drain
3. Wall containing the filter bed
4. media
5. filter distribution arm
7. When and where are monthly by the 20th of the following month; submitted to Austin
reports submitted?
8. How and when do you report a as soon as possible by phone within 24 hours; followed by in
bypass? writing within 5 working days
9. What are the 5 events of 1. Pollution
stream purification? 2. Degradation
3. Decomposition
, Wastewater B Test
Study online at https://quizlet.com/_gd4gq8
4. Recovery
5. Clear
10. What are the 2 methods for 1. Winkler method
measuring D.O.? 2. meter
11. What is needed for good com- good listening
munication?
12. How much chlorine gas comes 450
from one part liquid chlorine?
13. What does the "F and M" stand Food to Microorganism
for in the F:M Ratio?
14. What feeds the nitrification or- fatty volatile acids
ganisms?
15. An explosive atmosphere con- 1. Oxygen
tains what 2 things? 2. flammable gas vapor or dust
16. How deep should the drying 8-12 inches
bed sludge be?
17. Why is a low flow rated impor- to prevent undigested sludge from breaking through the ripe
tant when filling a drying bed? sludge blanket in the digester
18. Under a microscope what 2 or- 1. SILIATE
ganizms should be predomi- 2. rotifers
nant?
19. The detention time in a con- Less
tact stabilization plant is more
, Wastewater B Test
Study online at https://quizlet.com/_gd4gq8
or less than other extended
aeration plants?
20. What 2 things are chlorine 1. disinfection
used for? 2. odor control
21. What will a leaking chlorine freeze up
container do?
22. How are plant goals best ac- planning, PM, records, analysis
complished?
23. What is the function of the bot- turns the pump off
tom float in a lift station?
24. What must be used when con- an air gap between the pump and the water line twice the
necting a potable water supply diameter of the water line or at least 1", whichever is greater
to a lift station?
25. What is the problem if the su- 1. Bulking
pernatant in the settleometer 2. An equipment malfuntion such as a plugged R.A.S. or W.A.S.
is clear but the effluent is not? line
3. problem in secondary clarifier
26. Why does flow through a clari- to keep floc particles from coming over the wiers
fier move up slowly?
27. when should a manhole be at least every 500 feet or whenever necessary
placed?
28. Where should the sludge in bottom quarter
the clarifier be kept in the ac-
tivated sludge process?
