CWEA Collection System Maintenance Practice Quiz verified
questions and answers 2026\2027 A+ Grade
Primary purpose of a wastewater collection system
- correct answer To transport wastewater from its source to a treatment facility.
Commonly used pipe for gravity sewer systems
- correct answer PVC (Polyvinyl Chloride).
Function of a manhole in a collection system
- correct answer To provide access for inspection and maintenance.
Common cause of sewer blockages
- correct answer Grease buildup.
Required personal protective equipment (PPE) for confined space entry
- correct answer Hard hat, gloves, eye protection, and a gas monitor.
Infiltration in a sewer system
- correct answer Groundwater entering the system through defects.
I&I in wastewater collection
- correct answer Infiltration and Inflow.
How flow is typically measured in a sewer pipe
- correct answer Using a flow meter.
Main purpose of a lift station
- correct answer To pump wastewater to a higher elevation.
, Safe oxygen level for confined space entry
- correct answer 19.5% to 23.5%.
Tool used to clear tree roots from sewer lines
- correct answer Mechanical rodding machine.
What to do before entering a manhole
- correct answer Test the atmosphere for toxic and flammable gases.
Force main
- correct answer A pressurized pipe that conveys wastewater from a pump.
Symptom of sewer gas exposure
- correct answer Headaches and dizziness.
Type of maintenance that removes grease and sediment buildup
- correct answer Hydrojetting or high-pressure cleaning.
Common sign of a failing sewer lateral
- correct answer Frequent backups or slow drainage.
SCADA
- correct answer Supervisory Control and Data Acquisition.
Frequency of sewer line inspections
- correct answer Annually or based on system criticality.
Main goal of a preventive maintenance program
- correct answer To reduce emergency repairs and extend asset life.
Common gas found in sewers
- correct answer Hydrogen sulfide.
questions and answers 2026\2027 A+ Grade
Primary purpose of a wastewater collection system
- correct answer To transport wastewater from its source to a treatment facility.
Commonly used pipe for gravity sewer systems
- correct answer PVC (Polyvinyl Chloride).
Function of a manhole in a collection system
- correct answer To provide access for inspection and maintenance.
Common cause of sewer blockages
- correct answer Grease buildup.
Required personal protective equipment (PPE) for confined space entry
- correct answer Hard hat, gloves, eye protection, and a gas monitor.
Infiltration in a sewer system
- correct answer Groundwater entering the system through defects.
I&I in wastewater collection
- correct answer Infiltration and Inflow.
How flow is typically measured in a sewer pipe
- correct answer Using a flow meter.
Main purpose of a lift station
- correct answer To pump wastewater to a higher elevation.
, Safe oxygen level for confined space entry
- correct answer 19.5% to 23.5%.
Tool used to clear tree roots from sewer lines
- correct answer Mechanical rodding machine.
What to do before entering a manhole
- correct answer Test the atmosphere for toxic and flammable gases.
Force main
- correct answer A pressurized pipe that conveys wastewater from a pump.
Symptom of sewer gas exposure
- correct answer Headaches and dizziness.
Type of maintenance that removes grease and sediment buildup
- correct answer Hydrojetting or high-pressure cleaning.
Common sign of a failing sewer lateral
- correct answer Frequent backups or slow drainage.
SCADA
- correct answer Supervisory Control and Data Acquisition.
Frequency of sewer line inspections
- correct answer Annually or based on system criticality.
Main goal of a preventive maintenance program
- correct answer To reduce emergency repairs and extend asset life.
Common gas found in sewers
- correct answer Hydrogen sulfide.
