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Basic Wastewater Operator Practice
Exam Class 3 With Verified Solutions
Waste more sludge - correct-answer -What should be done when the
bio-reactor in an SBR plant is organically overloaded?
To keep valves from being submerged - correct-answer -Why are
approved backflow devices installed above ground level?
Increase wasting rate - correct-answer -What is the most appropriate
method to decrease F:M ratio?
0.123 MG - correct-answer -Calculate the total volume in million gallons
of both tanks.
GIVEN: Tank A = 20 ft. diameter, 35 ft. tall
Tank B = 45 ft. long, 20 ft. wide, 6 ft. deep.
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Oil & Grease - correct-answer -Which of the following can be analyzed
using composite samples?
NH3 (ammonia) - correct-answer -Which of the following can be
analyzed using composite samples?
Production of Volatile Acids - correct-answer -What causes the pH to
decrease during the anaerobic digestion process?
Water pressure - correct-answer -What factors control the throat size in
a chlorinator?
Blockage in intake - correct-answer -What causes a centrifugal pump
discharge pressure to increase and discharge quantity to decrease?
blockage in discharge line - correct-answer -What causes reduction in
pump discharge rate?
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Decreased settling rate - correct-answer -What should an operator
expect to occur when flow increases to the secondary clarifiers?
Organic Nitrogen and Ammonia - correct-answer -What is Total Kjeldahl
Nitrogen (TKN) comprised of?
Nitrification - correct-answer -What is the term used when the nitrifiers
convert the ammonia to nitrites and nitrates under aerobic conditions?
Denitrification - correct-answer -What is the term used when bacteria
convert nitrates and nitrites to nitrogen gas under anoxic conditions?
H2S - correct-answer -What is the chemical symbol for Hydrogen
sulfide?
Basic Wastewater Operator Practice
Exam Class 3 With Verified Solutions
Waste more sludge - correct-answer -What should be done when the
bio-reactor in an SBR plant is organically overloaded?
To keep valves from being submerged - correct-answer -Why are
approved backflow devices installed above ground level?
Increase wasting rate - correct-answer -What is the most appropriate
method to decrease F:M ratio?
0.123 MG - correct-answer -Calculate the total volume in million gallons
of both tanks.
GIVEN: Tank A = 20 ft. diameter, 35 ft. tall
Tank B = 45 ft. long, 20 ft. wide, 6 ft. deep.
,2|Page
Oil & Grease - correct-answer -Which of the following can be analyzed
using composite samples?
NH3 (ammonia) - correct-answer -Which of the following can be
analyzed using composite samples?
Production of Volatile Acids - correct-answer -What causes the pH to
decrease during the anaerobic digestion process?
Water pressure - correct-answer -What factors control the throat size in
a chlorinator?
Blockage in intake - correct-answer -What causes a centrifugal pump
discharge pressure to increase and discharge quantity to decrease?
blockage in discharge line - correct-answer -What causes reduction in
pump discharge rate?
, 3|Page
Decreased settling rate - correct-answer -What should an operator
expect to occur when flow increases to the secondary clarifiers?
Organic Nitrogen and Ammonia - correct-answer -What is Total Kjeldahl
Nitrogen (TKN) comprised of?
Nitrification - correct-answer -What is the term used when the nitrifiers
convert the ammonia to nitrites and nitrates under aerobic conditions?
Denitrification - correct-answer -What is the term used when bacteria
convert nitrates and nitrites to nitrogen gas under anoxic conditions?
H2S - correct-answer -What is the chemical symbol for Hydrogen
sulfide?
