Wastewater B Test Exam Prep Questions And Answers (202472025)
Percent of volatile solids normally in sludge - ✔✔70-80%
D.O. levels in a primary clarifier - ✔✔0.5-1.0 MG/L
Why are precautionary measures needed around an aeration basin? - ✔✔undertow
and turbulence
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
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
What are the 5 elements of a trickling filter? - ✔✔1. Floor
2. under drain
3. Wall containing the filter bed
4. media
5. filter distribution arm
When and where are monthly reports submitted? - ✔✔by the 20th of the following
month; submitted to Austin
How and when do you report a bypass? - ✔✔as soon as possible by phone within 24
hours; followed by in writing within 5 working days
, What are the 5 events of stream purification? - ✔✔1. Pollution
2. Degradation
3. Decomposition
4. Recovery
5. Clear
What are the 2 methods for measuring D.O.? - ✔✔1. Winkler method
2. meter
What is needed for good communication? - ✔✔good listening
How much chlorine gas comes from one part liquid chlorine? - ✔✔450
What does the "F and M" stand for in the F:M Ratio? - ✔✔Food to Microorganism
What feeds the nitrification organisms? - ✔✔fatty volatile acids
An explosive atmosphere contains what 2 things? - ✔✔1. Oxygen
2. flammable gas vapor or dust
How deep should the drying bed sludge be? - ✔✔8-12 inches
Why is a low flow rated important when filling a drying bed? - ✔✔to prevent
undigested sludge from breaking through the ripe sludge blanket in the digester
Percent of volatile solids normally in sludge - ✔✔70-80%
D.O. levels in a primary clarifier - ✔✔0.5-1.0 MG/L
Why are precautionary measures needed around an aeration basin? - ✔✔undertow
and turbulence
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
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
What are the 5 elements of a trickling filter? - ✔✔1. Floor
2. under drain
3. Wall containing the filter bed
4. media
5. filter distribution arm
When and where are monthly reports submitted? - ✔✔by the 20th of the following
month; submitted to Austin
How and when do you report a bypass? - ✔✔as soon as possible by phone within 24
hours; followed by in writing within 5 working days
, What are the 5 events of stream purification? - ✔✔1. Pollution
2. Degradation
3. Decomposition
4. Recovery
5. Clear
What are the 2 methods for measuring D.O.? - ✔✔1. Winkler method
2. meter
What is needed for good communication? - ✔✔good listening
How much chlorine gas comes from one part liquid chlorine? - ✔✔450
What does the "F and M" stand for in the F:M Ratio? - ✔✔Food to Microorganism
What feeds the nitrification organisms? - ✔✔fatty volatile acids
An explosive atmosphere contains what 2 things? - ✔✔1. Oxygen
2. flammable gas vapor or dust
How deep should the drying bed sludge be? - ✔✔8-12 inches
Why is a low flow rated important when filling a drying bed? - ✔✔to prevent
undigested sludge from breaking through the ripe sludge blanket in the digester
