WASTEWATER LEVEL III EXAM STUDY QUIDE QUESTIONS
WITH ACCURATE SOLUTIONS
What is the predominant organism responsible for stabilizing the waste in the trickling
filter? -- Answer ✔✔ Bacteria
Where should the air relief valve be located in a forced main in the collections system? -
- Answer ✔✔ At the highest elevation in the line.
What hazardous gases would an operator be potentially exposed to? -- Answer ✔✔
Hydrogensulfide, methane.
What is the ratio of methane to carbon dioxide in a properly operating anaerobic
digester? -- Answer ✔✔ 65-70% methane and 30-35% carbon dioxide.
You have an inflow of 100 gallons of storm water into your collections system. How
many people does this represent? -- Answer ✔✔ 100-200 gallons per day per person.
The best test to perform to determine the stabilization of waste in aerobic digestion is?
-- Answer ✔✔ Volatile solids.
, What are three physical factors that determine facultative pond efficiency? -- Answer
✔✔ Temperature, short-circuiting, depth.
Organisms that are both aerobic and anaerobic are called what? -- Answer ✔✔
Facultative.
When the DO drops to <1 or <2 nitrification. -- Answer ✔✔ Decreases remain the
same.
The conversion of ammonia to nitrate is called what? -- Answer ✔✔ Nitrification.
Most nitrogen entering a plant is in the form of what? -- Answer ✔✔ Ammonia and
organic nitrogen.
What is the purpose of for adding seed to a BOD sample? -- Answer ✔✔ To add
organisms to stabilize the organic material in the sample.
What is the first thing that should be done prior to performing a PH analysis? -- Answer
✔✔ Calibrate the meter.
You have 60lbs of material that is 21% chemical by weight. How many lbs. of chemical
do you have? -- Answer ✔✔ 12.6 lbs. of chemical.
How long must sludge records be maintained? -- Answer ✔✔ 5 years.
WITH ACCURATE SOLUTIONS
What is the predominant organism responsible for stabilizing the waste in the trickling
filter? -- Answer ✔✔ Bacteria
Where should the air relief valve be located in a forced main in the collections system? -
- Answer ✔✔ At the highest elevation in the line.
What hazardous gases would an operator be potentially exposed to? -- Answer ✔✔
Hydrogensulfide, methane.
What is the ratio of methane to carbon dioxide in a properly operating anaerobic
digester? -- Answer ✔✔ 65-70% methane and 30-35% carbon dioxide.
You have an inflow of 100 gallons of storm water into your collections system. How
many people does this represent? -- Answer ✔✔ 100-200 gallons per day per person.
The best test to perform to determine the stabilization of waste in aerobic digestion is?
-- Answer ✔✔ Volatile solids.
, What are three physical factors that determine facultative pond efficiency? -- Answer
✔✔ Temperature, short-circuiting, depth.
Organisms that are both aerobic and anaerobic are called what? -- Answer ✔✔
Facultative.
When the DO drops to <1 or <2 nitrification. -- Answer ✔✔ Decreases remain the
same.
The conversion of ammonia to nitrate is called what? -- Answer ✔✔ Nitrification.
Most nitrogen entering a plant is in the form of what? -- Answer ✔✔ Ammonia and
organic nitrogen.
What is the purpose of for adding seed to a BOD sample? -- Answer ✔✔ To add
organisms to stabilize the organic material in the sample.
What is the first thing that should be done prior to performing a PH analysis? -- Answer
✔✔ Calibrate the meter.
You have 60lbs of material that is 21% chemical by weight. How many lbs. of chemical
do you have? -- Answer ✔✔ 12.6 lbs. of chemical.
How long must sludge records be maintained? -- Answer ✔✔ 5 years.
