CWEA Collection System Maintenance Practice Questions With 100%
Answers Verifie
1. Primary purpose of a wastewater col- To transport wastewater from its source to a treat-
lection system ment facility.
2. Commonly used pipe for gravity sew- PVC (Polyvinyl Chloride).
er systems
3. Function of a manhole in a collection To provide access for inspection and maintenance.
system
4. Common cause of sewer blockages Grease buildup.
5. Required personal protective equip- Hard hat, gloves, eye protection, and a gas monitor.
ment (PPE) for confined space entry
6. Infiltration in a sewer system Groundwater entering the system through defects.
7. I&I in wastewater collection Infiltration and Inflow.
8. How flow is typically measured in a Using a flow meter.
sewer pipe
9. Main purpose of a lift station To pump wastewater to a higher elevation.
10. Safe oxygen level for confined space 19.5% to 23.5%.
entry
11. Tool used to clear tree roots from sew- Mechanical rodding machine.
er lines
12. What to do before entering a manhole Test the atmosphere for toxic and flammable gas-
es.
13. Force main A pressurized pipe that conveys wastewater from a
pump.
1/9
, CWEA Collection System Maintenance Practice Questions With 100%
Answers Verifie
14. Symptom of sewer gas exposure Headaches and dizziness.
15. Type of maintenance that removes Hydrojetting or high-pressure cleaning.
grease and sediment buildup
16. Common sign of a failing sewer lateral Frequent backups or slow drainage.
17. SCADA Supervisory Control and Data Acquisition.
18. Frequency of sewer line inspections Annually or based on system criticality.
19. Main goal of a preventive mainte- To reduce emergency repairs and extend asset life.
nance program
20. Common gas found in sewers Hydrogen sulfide.
21. Combination sewer system A sewer that carries both stormwater and waste-
water.
22. Type of map showing layout of a col- As-built or GIS map.
lection system
23. Minimum number of workers re- At least three (entrant, attendant, and supervisor).
quired for confined space entry
24. Agency certifying wastewater opera- CWEA (California Water Environment Association).
tors in California
25. Importance of recordkeeping in col- To track maintenance activities and support regu-
lection system maintenance latory compliance.
26. Primary cause of sewer infiltration Cracks or defects in sewer pipes allowing ground-
water in.
2/9
Answers Verifie
1. Primary purpose of a wastewater col- To transport wastewater from its source to a treat-
lection system ment facility.
2. Commonly used pipe for gravity sew- PVC (Polyvinyl Chloride).
er systems
3. Function of a manhole in a collection To provide access for inspection and maintenance.
system
4. Common cause of sewer blockages Grease buildup.
5. Required personal protective equip- Hard hat, gloves, eye protection, and a gas monitor.
ment (PPE) for confined space entry
6. Infiltration in a sewer system Groundwater entering the system through defects.
7. I&I in wastewater collection Infiltration and Inflow.
8. How flow is typically measured in a Using a flow meter.
sewer pipe
9. Main purpose of a lift station To pump wastewater to a higher elevation.
10. Safe oxygen level for confined space 19.5% to 23.5%.
entry
11. Tool used to clear tree roots from sew- Mechanical rodding machine.
er lines
12. What to do before entering a manhole Test the atmosphere for toxic and flammable gas-
es.
13. Force main A pressurized pipe that conveys wastewater from a
pump.
1/9
, CWEA Collection System Maintenance Practice Questions With 100%
Answers Verifie
14. Symptom of sewer gas exposure Headaches and dizziness.
15. Type of maintenance that removes Hydrojetting or high-pressure cleaning.
grease and sediment buildup
16. Common sign of a failing sewer lateral Frequent backups or slow drainage.
17. SCADA Supervisory Control and Data Acquisition.
18. Frequency of sewer line inspections Annually or based on system criticality.
19. Main goal of a preventive mainte- To reduce emergency repairs and extend asset life.
nance program
20. Common gas found in sewers Hydrogen sulfide.
21. Combination sewer system A sewer that carries both stormwater and waste-
water.
22. Type of map showing layout of a col- As-built or GIS map.
lection system
23. Minimum number of workers re- At least three (entrant, attendant, and supervisor).
quired for confined space entry
24. Agency certifying wastewater opera- CWEA (California Water Environment Association).
tors in California
25. Importance of recordkeeping in col- To track maintenance activities and support regu-
lection system maintenance latory compliance.
26. Primary cause of sewer infiltration Cracks or defects in sewer pipes allowing ground-
water in.
2/9
