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Alberta Wastewater Treatment Operator Level
1 Exam Actual exam Questions with Correct
Answers and explanations LATEST THIS YEAR -
JUST RELEASED
Alberta Wastewater Treatment Operator Level 1 Exam
Exam Coverage Summary
The Alberta Wastewater Treatment Level 1 certification exam tests knowledge of wastewater collection
and treatment principles, including sanitary sewer systems, gravity flow, lift stations, treatment
processes (stabilization ponds, aerated ponds, mechanical plants), safety procedures, confined space
entry, regulations under Alberta Environment and Protected Areas (AEPA), math calculations, chemistry
basics, sampling procedures, maintenance programs, and recordkeeping requirements for entry-level
municipal wastewater operators .
Question 1
What is the primary purpose of a wastewater collection system?
A) Generate electricity for treatment plants
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B) Treat drinking water before distribution
C) Convey wastewater from homes and businesses to treatment facilities
D) Store stormwater for irrigation purposes
Correct Answer: C
Summary Rationale: The main role of a collection system is to safely transport sewage from homes,
businesses, and industries to treatment plants .
Question 2
Which type of sewer carries only domestic and industrial wastewater, excluding stormwater?
A) Combined sewer
B) Storm sewer
C) Sanitary sewer
D) Interceptor sewer
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Correct Answer: C
Summary Rationale: Sanitary sewers carry domestic and industrial wastewater separately from
stormwater to prevent treatment plant overload during rain events .
Question 3
What is the main reason for venting manholes in a wastewater collection system?
A) To increase wastewater flow velocity
B) To release hazardous gases and prevent explosions
C) To reduce pipe friction during dry weather
D) To prevent rainwater from entering the system
Correct Answer: B
Summary Rationale: Manholes are vented to allow the escape of hazardous gases such as methane and
hydrogen sulfide, which can accumulate and create explosion risks .
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Question 4
Which pipe material is most commonly used for small-diameter sanitary sewers in Alberta?
A) Cast iron
B) PVC (polyvinyl chloride)
C) Concrete
D) Steel
Correct Answer: B
Summary Rationale: PVC pipe is lightweight, corrosion-resistant, and easy to install, making it ideal for
small-diameter sanitary sewers .
Question 5
In a gravity sewer system, wastewater flow is primarily driven by:
A) Pump stations located at each manhole
B) Pressure created by upstream valves
Alberta Wastewater Treatment Operator Level
1 Exam Actual exam Questions with Correct
Answers and explanations LATEST THIS YEAR -
JUST RELEASED
Alberta Wastewater Treatment Operator Level 1 Exam
Exam Coverage Summary
The Alberta Wastewater Treatment Level 1 certification exam tests knowledge of wastewater collection
and treatment principles, including sanitary sewer systems, gravity flow, lift stations, treatment
processes (stabilization ponds, aerated ponds, mechanical plants), safety procedures, confined space
entry, regulations under Alberta Environment and Protected Areas (AEPA), math calculations, chemistry
basics, sampling procedures, maintenance programs, and recordkeeping requirements for entry-level
municipal wastewater operators .
Question 1
What is the primary purpose of a wastewater collection system?
A) Generate electricity for treatment plants
, Page 2 of 136
B) Treat drinking water before distribution
C) Convey wastewater from homes and businesses to treatment facilities
D) Store stormwater for irrigation purposes
Correct Answer: C
Summary Rationale: The main role of a collection system is to safely transport sewage from homes,
businesses, and industries to treatment plants .
Question 2
Which type of sewer carries only domestic and industrial wastewater, excluding stormwater?
A) Combined sewer
B) Storm sewer
C) Sanitary sewer
D) Interceptor sewer
, Page 3 of 136
Correct Answer: C
Summary Rationale: Sanitary sewers carry domestic and industrial wastewater separately from
stormwater to prevent treatment plant overload during rain events .
Question 3
What is the main reason for venting manholes in a wastewater collection system?
A) To increase wastewater flow velocity
B) To release hazardous gases and prevent explosions
C) To reduce pipe friction during dry weather
D) To prevent rainwater from entering the system
Correct Answer: B
Summary Rationale: Manholes are vented to allow the escape of hazardous gases such as methane and
hydrogen sulfide, which can accumulate and create explosion risks .
, Page 4 of 136
Question 4
Which pipe material is most commonly used for small-diameter sanitary sewers in Alberta?
A) Cast iron
B) PVC (polyvinyl chloride)
C) Concrete
D) Steel
Correct Answer: B
Summary Rationale: PVC pipe is lightweight, corrosion-resistant, and easy to install, making it ideal for
small-diameter sanitary sewers .
Question 5
In a gravity sewer system, wastewater flow is primarily driven by:
A) Pump stations located at each manhole
B) Pressure created by upstream valves
