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CWEA CSM Grade 1 Exam Prep 2026–2027 | Collection System Maintenance Practice Questions & Verified Answers

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Prepare effectively for the CWEA Collection System Maintenance Grade 1 (CSM1) Exam 2026–2027 with this focused exam-prep resource featuring practice questions and verified answers covering essential wastewater collection system concepts. Review key areas such as sewer inspection and cleaning, preventive maintenance, wastewater collection infrastructure, pump stations, sanitary sewer overflows, basic construction and repair, tools and equipment, confined-space procedures, trenching and shoring, traffic control, PPE, safety regulations and collection-system calculations. These areas align closely with the competencies identified in CWEA's Grade 1 preparation and gap-analysis materials, making this a targeted resource for candidates preparing for the entry-level CSM1 certification.

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(CWEA) (CSM) Grade 1 Prep
Personnel entering a Permit Required Confined Space Entry and rescue procedures
must have the following 3 multiple choice options




Four conditions are necessary to create an explosion. Proper mixing of gas and oxygen.
Three of these conditions are combustible gas, adequate 3 multiple choice options
oxygen and sufficient heat. What is the fourth?


What tools are used with a power rodder? Spring blades
3 multiple choice options




Tools used for sewer rodding include all but the: Lag screw
3 multiple choice options




What items would you consider when selecting a solution Cause of stoppage
to clear a stoppage in a sewer? 3 multiple choice options




The interior of 300 feet of 12-inch pipe is uniformly 1,222 gallons
coated with one inch of grease. How many gallons will 3 multiple choice options
this pipe hold when filled with water?


Flatter sewer line grades may cause added sewer A decrease in velocity allowing organic and inorganic solids to settle out.
maintenance expenses and order nuisance. The problem 3 multiple choice options
is most likely caused by?


The lowest point on the inside of a pipeline is called the: Invert
3 multiple choice options




How often must an excavation site and adjacent areas Daily
be inspected for hazardous conditions? 3 multiple choice options




Protective shoring systems options include all but Working in an un-slopped trench with no shoring
3 multiple choice options




Sewer testing methods do not include: Sewage
3 multiple choice options




A flow of 650 gpm would be how many MGD? 0.936
3 multiple choice options




Emergency stoppages in pipelines may be cleared safely High velocity cleaners
by use of: 3 multiple choice options




After completing a temporary traffic control setup for your Observe how effective your TTC setup is working to control traffic and make the
work zone it is a good practice to: necessary changes to it if necessary.
3 multiple choice options



When a citizen wants information regarding a Give them as much factual information as you can, and offer to help them further.
maintenance operation you should? 3 multiple choice options




Maintenance programs are based on? Preventive and corrective maintenance principles
3 multiple choice options

, (CWEA) (CSM) Grade 1 Prep
The goal of preventative maintenance is to? Avoid breakdowns, severe damage. or harmful depreciation
3 multiple choice options




Equipment and traffic conditions frequently require Extraordinary
________ driving skills just to get to the job site 3 multiple choice options




Explosive or flammable atmospheres can develop At any time
_______ in the collections system? 3 multiple choice options




The proper testing sequence for atmospheres in Oxygen content. combustible gases and toxic gases
confined spaces is? 3 multiple choice options




The state of California requires that all employers have a Injury and illness prevention plan
written? 3 multiple choice options




Employees whom in the course of their Job, maybe Annually
required to wear respirators must be certified medically 3 multiple choice options
fit.


Employers must have an active safety program. Two Get all employees to have proper safety attitude.
very Important aspects of this plan should be (l) routine 3 multiple choice options
safety meetings, and (2)?


You are working inside a pump station with a crew Send for help and check and/or restore breathing.
performing some technical and hazardous maintenance. 3 multiple choice options
Suddenly an accident occurs that causes severe injuries
to one operator. What do you do first?


In the wastewater industry we find confined spaces Any work that may change the air quality
everywhere. What would make a routine confined space 3 multiple choice options
tum into a "permit required" confined space?


Cal/OSHA law requires that any vertical walled trench 5/2
over __ feet deep be shored. It also requires that the 3 multiple choice options
spoil be placed no closer than __ feet from the edge of
the trench.


It is unfortunate that in the wastewater industry most of The back
our injuries are to what part of the body? 3 multiple choice options




When working around pumps or other electrical Try to start the equipment
machinery we are required to follow strict lockout 3 multiple choice options
requirements. One of the last requirements just before
beginning work is to?


When working with confined spaces it is critical to Pre entry checks show otherwise
remember that all confined spaces are to be considered 3 multiple choice options
"permit required" confined spaces until?


Illegal or incorrect connections results from improper? Enforcement of service connection
3 multiple choice options




Infiltration is detected by? Metering flows/Smoke testing
3 multiple choice options

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September 4, 2026
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