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Alberta Wastewater Treatment Operator Level 1 Exam
ACTUAL Exam ALL 200 QUESTIONS AND CORRECT
ANSWERS LATEST UPDATE THIS YEAR
Alberta Wastewater Treatment Operator Level I
Comprehensive Exam Coverage Areas (Applies to All Batches)
This full practice exam series for Alberta Level 1 Wastewater Operators covers:
1. Basic Wastewater Treatment Principles
2. Preliminary & Primary Treatment Processes
3. Secondary (Biological) Treatment Fundamentals
4. Disinfection & Effluent Quality
5. Basic Laboratory Testing (pH, BOD, TSS, DO)
6. Pumps, Valves & Mechanical Equipment
7. Safety (OH&S Alberta Regulations)
8. Confined Space & Hazardous Gases
9. Basic Process Calculations (MGD, pounds/day, detention time)
10. Sludge Handling & Lagoons
11. Collection Systems Basics
12. Regulatory Compliance (Alberta Environment & Protected Areas)
BATCH 1 – 50 Questions (With Verified Answers & Rationales)
1. What is the primary purpose of wastewater treatment?
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A. Remove all water hardness
B. Produce drinking-quality water
C. Reduce pollutants to protect public health and the environment
D. Remove all dissolved solids
Correct Answer: C
Rationale: Level 1 facilities treat wastewater to meet safe discharge standards—not potable
water standards.
2. What is the typical range for raw domestic wastewater pH?
A. 4.0–5.0
B. 5.5–6.5
C. 6.5–8.5
D. 9.0–10.0
Correct Answer: C
Rationale: Domestic wastewater is generally near neutral, typically between 6.5 and 8.5.
3. Screening at the headworks removes:
A. Dissolved solids
B. Large debris and rags
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C. Nutrients
D. Bacteria
Correct Answer: B
Rationale: Screens protect downstream equipment by removing large solids.
4. Grit removal primarily eliminates:
A. Organic solids
B. Sand and gravel
C. Bacteria
D. Dissolved oxygen
Correct Answer: B
5. Primary clarifiers remove solids by:
A. Filtration
B. Biological action
C. Gravity settling
D. Chemical oxidation
Correct Answer: C
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6. BOD measures:
A. Total solids
B. Oxygen required by microorganisms to break down organics
C. Chlorine demand
D. pH change
Correct Answer: B
7. TSS stands for:
A. Total Suspended Solids
B. Total Settled Solids
C. Treated Sludge System
D. Total Sewer Solids
Correct Answer: A
8. Secondary treatment mainly uses:
A. Chemicals
B. Physical removal
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Alberta Wastewater Treatment Operator Level 1 Exam
ACTUAL Exam ALL 200 QUESTIONS AND CORRECT
ANSWERS LATEST UPDATE THIS YEAR
Alberta Wastewater Treatment Operator Level I
Comprehensive Exam Coverage Areas (Applies to All Batches)
This full practice exam series for Alberta Level 1 Wastewater Operators covers:
1. Basic Wastewater Treatment Principles
2. Preliminary & Primary Treatment Processes
3. Secondary (Biological) Treatment Fundamentals
4. Disinfection & Effluent Quality
5. Basic Laboratory Testing (pH, BOD, TSS, DO)
6. Pumps, Valves & Mechanical Equipment
7. Safety (OH&S Alberta Regulations)
8. Confined Space & Hazardous Gases
9. Basic Process Calculations (MGD, pounds/day, detention time)
10. Sludge Handling & Lagoons
11. Collection Systems Basics
12. Regulatory Compliance (Alberta Environment & Protected Areas)
BATCH 1 – 50 Questions (With Verified Answers & Rationales)
1. What is the primary purpose of wastewater treatment?
1
, Page 2 of 89
A. Remove all water hardness
B. Produce drinking-quality water
C. Reduce pollutants to protect public health and the environment
D. Remove all dissolved solids
Correct Answer: C
Rationale: Level 1 facilities treat wastewater to meet safe discharge standards—not potable
water standards.
2. What is the typical range for raw domestic wastewater pH?
A. 4.0–5.0
B. 5.5–6.5
C. 6.5–8.5
D. 9.0–10.0
Correct Answer: C
Rationale: Domestic wastewater is generally near neutral, typically between 6.5 and 8.5.
3. Screening at the headworks removes:
A. Dissolved solids
B. Large debris and rags
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C. Nutrients
D. Bacteria
Correct Answer: B
Rationale: Screens protect downstream equipment by removing large solids.
4. Grit removal primarily eliminates:
A. Organic solids
B. Sand and gravel
C. Bacteria
D. Dissolved oxygen
Correct Answer: B
5. Primary clarifiers remove solids by:
A. Filtration
B. Biological action
C. Gravity settling
D. Chemical oxidation
Correct Answer: C
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6. BOD measures:
A. Total solids
B. Oxygen required by microorganisms to break down organics
C. Chlorine demand
D. pH change
Correct Answer: B
7. TSS stands for:
A. Total Suspended Solids
B. Total Settled Solids
C. Treated Sludge System
D. Total Sewer Solids
Correct Answer: A
8. Secondary treatment mainly uses:
A. Chemicals
B. Physical removal
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