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Saskatchewan Wastewater Operator Level III
Practice EXAM LATEST VERSION WITH 300
QUESTIONS AND CORRECT DETAILED
SOLUTIONS JUST RELEASED THIS YEAR
1. What is the primary purpose of a wastewater treatment plant?
A. Produce potable water
B. Protect public health and the environment by treating wastewater
C. Generate electricity
D. Provide irrigation water
Answer: B
The main goal of wastewater treatment is to remove contaminants and protect public health
and the environment.
2. Which parameter is most commonly used to measure organic strength in wastewater?
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A. pH
B. Biochemical Oxygen Demand (BOD)
C. Total Suspended Solids (TSS)
D. Conductivity
Answer: B
BOD measures the amount of oxygen microorganisms require to degrade organic matter.
3. What does Total Suspended Solids (TSS) primarily measure?
A. Dissolved salts
B. Organic oxygen demand
C. Particulate matter in wastewater
D. Chlorine concentration
Answer: C
TSS measures the concentration of particulate matter suspended in wastewater.
4. What is the typical range of pH in treated municipal wastewater discharge?
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A. 3–5
B. 6–7
C. 6.5–9
D. 9–11
Answer: C
Treated wastewater should generally have a pH near neutral, usually between 6.5 and 9.
5. Which parameter is most critical for preventing corrosion in wastewater piping?
A. BOD
B. pH and hydrogen sulfide levels
C. Total solids
D. Nitrate
Answer: B
Low pH and hydrogen sulfide promote corrosion, requiring monitoring and control.
6. What is Chemical Oxygen Demand (COD)?
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A. A measure of dissolved oxygen in wastewater
B. A measure of the oxygen equivalent of organic matter that can be chemically oxidized
C. A measure of suspended solids
D. A measure of chlorine demand
Answer: B
COD measures the oxygen equivalent of organic matter that can be oxidized chemically,
providing a rapid indicator of organic strength.
7. What causes turbidity in wastewater?
A. Color
B. Dissolved calcium
C. Finely divided suspended material
D. Hardness
Answer: C
Turbidity in wastewater is caused by finely divided suspended material.
4
SUCCESS!
Saskatchewan Wastewater Operator Level III
Practice EXAM LATEST VERSION WITH 300
QUESTIONS AND CORRECT DETAILED
SOLUTIONS JUST RELEASED THIS YEAR
1. What is the primary purpose of a wastewater treatment plant?
A. Produce potable water
B. Protect public health and the environment by treating wastewater
C. Generate electricity
D. Provide irrigation water
Answer: B
The main goal of wastewater treatment is to remove contaminants and protect public health
and the environment.
2. Which parameter is most commonly used to measure organic strength in wastewater?
1
SUCCESS!
,Page 2 of 175
A. pH
B. Biochemical Oxygen Demand (BOD)
C. Total Suspended Solids (TSS)
D. Conductivity
Answer: B
BOD measures the amount of oxygen microorganisms require to degrade organic matter.
3. What does Total Suspended Solids (TSS) primarily measure?
A. Dissolved salts
B. Organic oxygen demand
C. Particulate matter in wastewater
D. Chlorine concentration
Answer: C
TSS measures the concentration of particulate matter suspended in wastewater.
4. What is the typical range of pH in treated municipal wastewater discharge?
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,Page 3 of 175
A. 3–5
B. 6–7
C. 6.5–9
D. 9–11
Answer: C
Treated wastewater should generally have a pH near neutral, usually between 6.5 and 9.
5. Which parameter is most critical for preventing corrosion in wastewater piping?
A. BOD
B. pH and hydrogen sulfide levels
C. Total solids
D. Nitrate
Answer: B
Low pH and hydrogen sulfide promote corrosion, requiring monitoring and control.
6. What is Chemical Oxygen Demand (COD)?
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, Page 4 of 175
A. A measure of dissolved oxygen in wastewater
B. A measure of the oxygen equivalent of organic matter that can be chemically oxidized
C. A measure of suspended solids
D. A measure of chlorine demand
Answer: B
COD measures the oxygen equivalent of organic matter that can be oxidized chemically,
providing a rapid indicator of organic strength.
7. What causes turbidity in wastewater?
A. Color
B. Dissolved calcium
C. Finely divided suspended material
D. Hardness
Answer: C
Turbidity in wastewater is caused by finely divided suspended material.
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