Wastewater Operator Class 1 & 2 Practice Set Exam with Questions and Answers
– 100$% Solved
____________________ pumps work on the principle of a decrease in overall specific weight of
a confined column of gas and water mixture. - ✔✔✔-Air Lift
4 avenues of exposure - ✔✔✔-Ingestion (fecal/oral transmission), Inhalation (breathing),
Injection (needles), invasion (cut or any break of the skin)
5 types of pathogenic organisms - ✔✔✔-viruses, bacteria, protozoa, fungi, and
helminths/worms
5 ways to measure water depth. - ✔✔✔-Floats, Electrical, Ultrasonic, Submerged pressure
transducer, and bubbler
A grab sample is taken: - ✔✔✔-at "maximum" conditions such as high flow
A KDPES permit establishes what? - ✔✔✔-What can be discharged, discharge limits for each
parameter, how much can be discharged, sampling frequency, and sample collection method for
each discharge parameter
a measure of carbon dioxide given off when material is heated to 550° - ✔✔✔-Total Organic
Carbon (TOC)
A newly created pond/lagoon will establish a thriving biological population for waste reduction
in about how many days? - ✔✔✔-60 days
A primary cause for denitrification in a secondary clarifier is: - ✔✔✔-Low dissolved oxygen
A spill or dump of unknown origin, which could be harmful to the treatment process or the
operator(s), is known as what? - ✔✔✔-Slug load
,Wastewater Operator Class 1 & 2 Practice Set Exam with Questions and Answers
– 100$% Solved
A sudden increase in amperage being pulled by a pump motor could be an indication of: -
✔✔✔-A pumping restriction
A sudden increase in organic loading on the biological treatment system, with an acidically low
pH, is known as a what? - ✔✔✔-Shock load
A two stage trickling filter system is designed for a minimum BOD5 removal efficiency
percentage of: - ✔✔✔-85%
A wastewater treatment facility with a capacity of 2.0-7.5 mgd is classified as what class? -
✔✔✔-Class III
A white coating formed on the elements of a rotating biological contactor (RBC) is an indication
of: - ✔✔✔-Septic conditions
Algae are microscopic plants that require what three things? - ✔✔✔-Sunlight, carbon dioxide,
nitrogen and phosphorus
An approved method of measuring chlorine residual is: - ✔✔✔-Amperometric Titration
An overabundance of dark, brown greasy looking foam is an indication of what? - ✔✔✔-Old
sludge or filamentous organisms
At what point in the treatment process should a fecal sample be grabbed? - ✔✔✔-At the last
point of the treatment process
, Wastewater Operator Class 1 & 2 Practice Set Exam with Questions and Answers
– 100$% Solved
At what VA/TA ration would an anaerobic digester be under stress from volatile
acids/compounds? - ✔✔✔-0.3-0.4
Auger type pump housed in trough or on an incline - commonly used on influent or effluent -
✔✔✔-Incline screw pumps
Bacteria that can grow with or without free oxygen - ✔✔✔-Facultative
Bacteria use ______________, not oxygen, in the process of making energy - ✔✔✔-nitrate
Bar screens are normally installed at what angle? - ✔✔✔-45-60° angle
Before working on electrical wires, circuits, control boards, or motors the operator should do
what? - ✔✔✔-ensure that all power sources are locked out and tagged out
Beggiatoa is a - ✔✔✔-filamentous organism
Binary fission - ✔✔✔-reproduce by splitting in two
Biochemical Oxygen Demand (BOD) - ✔✔✔-Uses bacteria and oxygen used to estimate
biologically useful carbon
Biochemical reactions are very _______ dependent - ✔✔✔-Temperature
Cadmium, Lead, Nickel and Zinc are classified as what kind of pollutant? - ✔✔✔-Priority
pollutants
– 100$% Solved
____________________ pumps work on the principle of a decrease in overall specific weight of
a confined column of gas and water mixture. - ✔✔✔-Air Lift
4 avenues of exposure - ✔✔✔-Ingestion (fecal/oral transmission), Inhalation (breathing),
Injection (needles), invasion (cut or any break of the skin)
5 types of pathogenic organisms - ✔✔✔-viruses, bacteria, protozoa, fungi, and
helminths/worms
5 ways to measure water depth. - ✔✔✔-Floats, Electrical, Ultrasonic, Submerged pressure
transducer, and bubbler
A grab sample is taken: - ✔✔✔-at "maximum" conditions such as high flow
A KDPES permit establishes what? - ✔✔✔-What can be discharged, discharge limits for each
parameter, how much can be discharged, sampling frequency, and sample collection method for
each discharge parameter
a measure of carbon dioxide given off when material is heated to 550° - ✔✔✔-Total Organic
Carbon (TOC)
A newly created pond/lagoon will establish a thriving biological population for waste reduction
in about how many days? - ✔✔✔-60 days
A primary cause for denitrification in a secondary clarifier is: - ✔✔✔-Low dissolved oxygen
A spill or dump of unknown origin, which could be harmful to the treatment process or the
operator(s), is known as what? - ✔✔✔-Slug load
,Wastewater Operator Class 1 & 2 Practice Set Exam with Questions and Answers
– 100$% Solved
A sudden increase in amperage being pulled by a pump motor could be an indication of: -
✔✔✔-A pumping restriction
A sudden increase in organic loading on the biological treatment system, with an acidically low
pH, is known as a what? - ✔✔✔-Shock load
A two stage trickling filter system is designed for a minimum BOD5 removal efficiency
percentage of: - ✔✔✔-85%
A wastewater treatment facility with a capacity of 2.0-7.5 mgd is classified as what class? -
✔✔✔-Class III
A white coating formed on the elements of a rotating biological contactor (RBC) is an indication
of: - ✔✔✔-Septic conditions
Algae are microscopic plants that require what three things? - ✔✔✔-Sunlight, carbon dioxide,
nitrogen and phosphorus
An approved method of measuring chlorine residual is: - ✔✔✔-Amperometric Titration
An overabundance of dark, brown greasy looking foam is an indication of what? - ✔✔✔-Old
sludge or filamentous organisms
At what point in the treatment process should a fecal sample be grabbed? - ✔✔✔-At the last
point of the treatment process
, Wastewater Operator Class 1 & 2 Practice Set Exam with Questions and Answers
– 100$% Solved
At what VA/TA ration would an anaerobic digester be under stress from volatile
acids/compounds? - ✔✔✔-0.3-0.4
Auger type pump housed in trough or on an incline - commonly used on influent or effluent -
✔✔✔-Incline screw pumps
Bacteria that can grow with or without free oxygen - ✔✔✔-Facultative
Bacteria use ______________, not oxygen, in the process of making energy - ✔✔✔-nitrate
Bar screens are normally installed at what angle? - ✔✔✔-45-60° angle
Before working on electrical wires, circuits, control boards, or motors the operator should do
what? - ✔✔✔-ensure that all power sources are locked out and tagged out
Beggiatoa is a - ✔✔✔-filamentous organism
Binary fission - ✔✔✔-reproduce by splitting in two
Biochemical Oxygen Demand (BOD) - ✔✔✔-Uses bacteria and oxygen used to estimate
biologically useful carbon
Biochemical reactions are very _______ dependent - ✔✔✔-Temperature
Cadmium, Lead, Nickel and Zinc are classified as what kind of pollutant? - ✔✔✔-Priority
pollutants
