CWEA Collections System Maintenance, Grade 1, 2, 3, 4, Exam Questions and Answers (2025 / 2026) (Verified Answers)

"High priority subsurface installations ae high pressure natural gas pipelines with normal operating
pressures greater than 415 kPa gauge, petroleum pipelines, conductors or cables that are potentially
hazardous to employees, or the public, if damaged." This paragraph indicates that before the start date of
an excavation, what should occur? – ans An agreed upon site visit
550 gallons of sewage overflow and do not reach any surface waters. What category of overflow is this? –
ans Category 3
A flow of 650 pgm would be how many mgd? - ans0.936
A hazard that may damage a TV camera going through a sewer is: - ansan offset joint
A person who completes a training program in accordance with the requirements of Title 8, Calif. Code of
Regulations, Minimum Guidelines of the Common Ground Alliance is considered a ______________
person - ansQualified Person
According to the State Water Resources Control Board Order No. 2006-003-DWQ, each enrollee must
develop and implement a system-specific: - ansSSMP (Sewer System Management Plan)
After completing a Temporary Traffic Control setup for your work zone it is a good practice to: -
ansObserve how effective your TTC setup is working to control traffic and make the necessary changes
Based on new Best Practices of the Common Ground Alliance for marking underground Utilities, the
Inquiry Identification Number for an Underground Service Alert (USA) is viable for how many days? -
ans28 days
Before starting a maintenance operation in a basement located in the backyard of a residence you
should: - anscontact the resident and politely ask permission to enter their backyard
Biological activity in long, sluggish-flow, flat grade sewer lines will likely cause: - ansodors
Clear water in entering a collection system is called what? - ansinfiltration
emergency stoppages in pipelines may be cleared safely by use of: - anshigh velocity cleaners
Flatter sewer line grades may cause added sewer maintenance expense and odor nuisance. This is
caused by what? - ansA decrease in velocity which allows organic and inorganic solids to settle out. This,
in turn, allows biological activity to happen which corrodes the pipe and releases hydrogen sulfide (H2S)
which smells like rotten eggs
For a nighttime Short Term Stationary Traffic Control Zone setup on low speed/ low volume street, the
minimum height of the traffic cones used shall be ________ - ans28 inches
How can the members of a balling crew communicate with each other? - ansHand Signals