Wastewater B Test questions 2025 with
correct solutions
Percent of volatile solids normally in sludge - ** VERIFIED ANSWERS **✔✔70-80%
D.O. levels in a primary clarifier - ** VERIFIED ANSWERS **✔✔0.5-1.0 MG/L
Why are precautionary measures needed around an aeration basin? - ** VERIFIED
ANSWERS **✔✔undertow and turbulence
O.S.H.A. approved trench - ** VERIFIED ANSWERS **✔✔narrow excavation in which the
depth is greater than the width; the width must be less than 15 feet
What causes bulking? - ** VERIFIED ANSWERS **✔✔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? - ** VERIFIED ANSWERS **✔✔1. Floor
2. under drain
3. Wall containing the filter bed
4. media
5. filter distribution arm
When and where are monthly reports submitted? - ** VERIFIED ANSWERS **✔✔by the
20th of the following month; submitted to Austin
, How and when do you report a bypass? - ** VERIFIED ANSWERS **✔✔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? - ** VERIFIED ANSWERS **✔✔1. Pollution
2. Degradation
3. Decomposition
4. Recovery
5. Clear
What are the 2 methods for measuring D.O.? - ** VERIFIED ANSWERS **✔✔1. Winkler
method
2. meter
What is needed for good communication? - ** VERIFIED ANSWERS **✔✔good listening
How much chlorine gas comes from one part liquid chlorine? - ** VERIFIED ANSWERS
**✔✔450
What does the "F and M" stand for in the F:M Ratio? - ** VERIFIED ANSWERS **✔✔Food
to Microorganism
What feeds the nitrification organisms? - ** VERIFIED ANSWERS **✔✔fatty volatile acids
An explosive atmosphere contains what 2 things? - ** VERIFIED ANSWERS **✔✔1.
Oxygen
2. flammable gas vapor or dust
correct solutions
Percent of volatile solids normally in sludge - ** VERIFIED ANSWERS **✔✔70-80%
D.O. levels in a primary clarifier - ** VERIFIED ANSWERS **✔✔0.5-1.0 MG/L
Why are precautionary measures needed around an aeration basin? - ** VERIFIED
ANSWERS **✔✔undertow and turbulence
O.S.H.A. approved trench - ** VERIFIED ANSWERS **✔✔narrow excavation in which the
depth is greater than the width; the width must be less than 15 feet
What causes bulking? - ** VERIFIED ANSWERS **✔✔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? - ** VERIFIED ANSWERS **✔✔1. Floor
2. under drain
3. Wall containing the filter bed
4. media
5. filter distribution arm
When and where are monthly reports submitted? - ** VERIFIED ANSWERS **✔✔by the
20th of the following month; submitted to Austin
, How and when do you report a bypass? - ** VERIFIED ANSWERS **✔✔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? - ** VERIFIED ANSWERS **✔✔1. Pollution
2. Degradation
3. Decomposition
4. Recovery
5. Clear
What are the 2 methods for measuring D.O.? - ** VERIFIED ANSWERS **✔✔1. Winkler
method
2. meter
What is needed for good communication? - ** VERIFIED ANSWERS **✔✔good listening
How much chlorine gas comes from one part liquid chlorine? - ** VERIFIED ANSWERS
**✔✔450
What does the "F and M" stand for in the F:M Ratio? - ** VERIFIED ANSWERS **✔✔Food
to Microorganism
What feeds the nitrification organisms? - ** VERIFIED ANSWERS **✔✔fatty volatile acids
An explosive atmosphere contains what 2 things? - ** VERIFIED ANSWERS **✔✔1.
Oxygen
2. flammable gas vapor or dust
