Wastewater Treatment (Latest 2026/
2027 Update) Actual Exam Questions &
Answers | Grade A
Accelerate your exam preparation with this Wastewater Treatment: 51 Practice
Questions & Answers. This comprehensive study guide delivers 51 targeted
practice questions to help you confidently master plant operations, mathematical
formulas, and core biological processes required for state certification.
What the Exam Covers
Process Control: Activated sludge, trickling filters, biological nutrient removal, and
aeration.
Plant Maintenance: Lift stations, pump calibration, and blower operations.
Math & Formulas: F ÷ M ratio calculations, BOD removal, MCRT, and detention
times.
Safety & Regulations: Confined space entry, chlorine handling, and TSS
measurements.
Why Choose This Study Aid
Realistic Testing Environment: Mirrors the format and difficulty level of standard
operator certification exams.
Targeted Knowledge Gaps: Ideal for identifying weaknesses in treatment theory
and process troubleshooting.
Taken by: Study Ac
Practice Test 0% Score
,1. What occurs during the secondary treatment of wastewater in a conventional
sewage treatment plant?
Microbial growth on dissolved organic matter
Microbial growth on inorganic nutrients
Chemical removal of inorganic nutrients
Physical removal of solids
2. What is the purpose of pumping stations in wastewater treatment?
To move sewage when gravity is not enough.
To monitor effluent purity.
To collect stormwater runoff.
To treat wastewater through aeration.
3. If a wastewater treatment facility fails to properly monitor its effluent, what
potential environmental impact could occur?
Reduction of wastewater treatment costs.
Increased recreational activities in the area.
Contamination of local waterways with harmful pollutants.
Improved water quality in local rivers and lakes.
4. __________ treatment removes solids that readily settle or float. This step uses the
force of gravity and the density difference between the water and solids to
substantially reduce the solids content of the wastewater. ________treatment
includes settling tanks, Scum collection and removal, Sludge collection and removal
2
, Primary
Preliminary
Secondary
Intermediate
5. Aeration tanks, in which aerobic microbes break down organic materials in water, are
used during _______ wastewater treatment.
Preliminary
Primary
Final
Secondary
6. What is the main function that a septic tank performs?
Principally, collects the fats, oil and grease
Provides for the separation of solids and liquids
None of the answers apply
Treats the wastewater to treatment level 3 on the state code
7. Describe the primary function of storm sewers in urban areas.
Storm sewers are used to transport sewage from homes.
Storm sewers are primarily for industrial waste disposal.
Storm sewers are designed to carry runoff from rainwater to prevent flooding.
Storm sewers treat wastewater before it is released.
2027 Update) Actual Exam Questions &
Answers | Grade A
Accelerate your exam preparation with this Wastewater Treatment: 51 Practice
Questions & Answers. This comprehensive study guide delivers 51 targeted
practice questions to help you confidently master plant operations, mathematical
formulas, and core biological processes required for state certification.
What the Exam Covers
Process Control: Activated sludge, trickling filters, biological nutrient removal, and
aeration.
Plant Maintenance: Lift stations, pump calibration, and blower operations.
Math & Formulas: F ÷ M ratio calculations, BOD removal, MCRT, and detention
times.
Safety & Regulations: Confined space entry, chlorine handling, and TSS
measurements.
Why Choose This Study Aid
Realistic Testing Environment: Mirrors the format and difficulty level of standard
operator certification exams.
Targeted Knowledge Gaps: Ideal for identifying weaknesses in treatment theory
and process troubleshooting.
Taken by: Study Ac
Practice Test 0% Score
,1. What occurs during the secondary treatment of wastewater in a conventional
sewage treatment plant?
Microbial growth on dissolved organic matter
Microbial growth on inorganic nutrients
Chemical removal of inorganic nutrients
Physical removal of solids
2. What is the purpose of pumping stations in wastewater treatment?
To move sewage when gravity is not enough.
To monitor effluent purity.
To collect stormwater runoff.
To treat wastewater through aeration.
3. If a wastewater treatment facility fails to properly monitor its effluent, what
potential environmental impact could occur?
Reduction of wastewater treatment costs.
Increased recreational activities in the area.
Contamination of local waterways with harmful pollutants.
Improved water quality in local rivers and lakes.
4. __________ treatment removes solids that readily settle or float. This step uses the
force of gravity and the density difference between the water and solids to
substantially reduce the solids content of the wastewater. ________treatment
includes settling tanks, Scum collection and removal, Sludge collection and removal
2
, Primary
Preliminary
Secondary
Intermediate
5. Aeration tanks, in which aerobic microbes break down organic materials in water, are
used during _______ wastewater treatment.
Preliminary
Primary
Final
Secondary
6. What is the main function that a septic tank performs?
Principally, collects the fats, oil and grease
Provides for the separation of solids and liquids
None of the answers apply
Treats the wastewater to treatment level 3 on the state code
7. Describe the primary function of storm sewers in urban areas.
Storm sewers are used to transport sewage from homes.
Storm sewers are primarily for industrial waste disposal.
Storm sewers are designed to carry runoff from rainwater to prevent flooding.
Storm sewers treat wastewater before it is released.
