Download CWEA Collections Grade 3 Exam Questions and Answers 2025/2026 and more Exams Water and Wastewater Engineering in PDF only on Docsity!
CWEA Collections Grade 3 202 5/2026 Exam|
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Correct| Grade A
Q: Which chemical may be used for odor control in a sewer system?
a. Calcium chloride b. Hydrogen peroxide c. Oxidized aluminum d. Sodium chloride Answer: b. Hydrogen peroxide
Q: What information must be on a warning tag attached to a switch that has been locked out?
a. Directions for removing tag. b. Name of nearest physician to call in case of emergency. c. Signature of person who locked out switch and who is the only person authorized to remove tag. d. Time to unlock switch. Answer: c. Signature of person who locked out switch and who is the only person authorized to remove tag.
Q: Under what conditions must each member of the rescue service practice permit space
rescues? a. At least once a year in a simulated situation or by the satisfactory performance of an actual rescue. b. At least twice a year in simulated situations. c. At least once a year in simulated situation using non-representative space conditions d. At least four times a year. Answer: a. At least once a year in a simulated situation or by the satisfactory performance of an actual rescue.
Q: How is a permit-required space described?
a. Has or may contain atmospheric, engulfment, design, or other serious health/safety hazard. b. Is large enough to enter and work in and is meant for continuous occupancy. c. Is large enough to enter and work in and has an unrestricted entry/exit. d. Never contains an atmospheric or engulfment hazard. Answer: a. Has or may contain atmospheric, engulfment, design, or other serious health/safety hazard.
Q: What are the three duties of personnel in a Confined Space entry?
a. Authorized entrants, parking attendants, entry supervisors. b. Unauthorized entrants, attendants, entry supervisors. c. Authorized entrants, attendants, entry supervisors. d. Authorized entrants, attendants, evening supervisors Answer: c. Authorized entrants, attendants, entry supervisors.
Q: What is an important element of hydrogen sulfide production?
a. Flow velocity. b. Pipe materials. c. Amount of odor present. d. Amount of inorganic materials. Answer: a. Flow velocity.
Q: Which of the following is the most common factor leading to the generation of hydrogen
sulfide in sewers? a. Anaerobic conditions. b. Constantly high velocity of flow in sewers. c. Low concentrations of ferrous sulfide. d. Presence of highly soluble fats and oils.
b. Mechanical rodder c. Combination unit d. Bucket machine Answer: c. Combination unit
Q: In sewer maintenance, what is a pig?
a. A ball forced through a sewer line. b. A power rod. c. Any foul smelling equipment. d. The hydraulic rodding truck. Answer: a. A ball forced through a sewer line.
Q: When pouring a concrete slab, which of the following tools is used to finish the concrete?
a. Grasshopper. b. Tamper. c. Trowel. d. Vibrator. Answer: c. Trowel.
Q: What tool is used to snare a broken section of sewer rod?
a. Square stock corkscrew. b. Auger. c. Pickup tool. d. Pull out tool. Answer: c. Pickup tool.
Q: Why is the replacement of wastewater collection systems in some downtown streets
difficult? a. Crowding of other underground utilities. b. Records have not been maintained properly and the collection system is lost. c. Some people have landscaped their backyards over the collection system and do not want their yards dug up. d. The streets will have to be paved again Answer: a. Crowding of other underground utilities.
Q: How can the velocity of water flowing in a sewer be estimated?
a. Driving between manholes and reading the speedometer. b. Measuring the Manning's roughness coefficient for the sewer. c. Measuring the time it takes for the dye to be carried by the wastewater between the two manholes. d. Measuring the time it takes to run between the two manholes. Answer: c. Measuring the time it takes for the dye to be carried by the wastewater between the two manholes.
Q: Drawings which are considered "As Built" would be?
a. Construction drawings issued to the contractor. b. Corrected construction drawings showing changes made in the field installation. c. Detailed drawings of proposed construction. d. Sectional maps on file. Answer: b. Corrected construction drawings showing changes made in the field installation.
Q: In lieu of a shorting system, the sides or the walls of an excavation, or trench, may be:
a. sloped 3:1. b. sloped 1:3. c. sloped 2:1.
Q: When a grade conflict exists between a water main and a sewer main, which of the
following is the best solution? a. Build a manhole around the sewer main and continue the water main through the manhole. b. Drop the sewer service under the water main and let it work like a siphon. c. Have the water main adjusted and hold the grade on the sewer main. d. Raise the sewer over the water main and install a sewer pump station. Answer: c. Have the water main adjusted and hold the grade on the sewer main.
Q: The reason newly constructed collection system sewers should be inspected is to:
a. determine if the contractor has complied with plans and specifications. b. determine if smoke tests will be successful. c. determine if dye tests will be successful. d. determine if the streets are paved. Answer: a. determine if the contractor has complied with plans and specifications.
Q: A source of infiltration in a collection system is:
a. new pipes. b. proper joint pipes. c. pipe liners d. broken pipe joints Answer: d. broken pipe joints
Q: What are the advantages of a video tape recording system?
a. Cheaper than a Polaroid camera. b. Record and play private video tapes. c. The ability to see what's happening when the camera is underwater. d. The length and severity of defective areas that can be recorded for later study. Answer:
d. The length and severity of defective areas that can be recorded for later study.
Q: Before conducting smoke testing you should:
a. warn the public after smoke testing is completed. b. notify local police and fire departments only if a fire is started. c. notify local animal control departments in advance of testing. d. notify public, local police, and fire departments in advance of testing. Answer: d. notify public, local police, and fire departments in advance of testing.
Q: Manholes are installed in sewer lines for the access of:
a. backflow devices. b. personnel and materials c. traffic control devices. d. survey equipment. Answer: b. personnel and materials
Q: Anaerobic wastewater is frequently corrosive to materials it contacts, especially:
a. coal tar enamel. b. concrete. c. stainless Steel. d. plastic. Answer: b. concrete.
Q: Pipe materials that are the least susceptible to corrosion by acids formed from gases
generated in sewers is: a. ACP. b. CIP. c. RCP.
a. Grade of sewer. b. Pipe material. c. Structures or sources of vibration near trenches. d. Cost of shoring. Answer: c. Structures or sources of vibration near trenches.
Q: When sewer line grades are too flat, an odor problem is likely to result. The most likely
cause of the odor problem is decreased velocity which: a. allows decomposable solids to settle. b. decreases the treatment time in the lines. c. increases the treatment time of inorganic solids. d. allow decomposable solids to be suspended. Answer: a. allows decomposable solids to settle.
Q: After a collection system problem has been solved, you should:
a. wait until next week to fill out the report forms. b. take a break. c. go home. d. evaluate the effectiveness of the results. Answer: d. evaluate the effectiveness of the results.
Q: Improper connections can be detected through:
a. DO tests. b. soundings. c. TV inspection. d. radar. Answer: c. TV inspection.
Q: A Flagger should Stand?
A. On the shoulder adjacent to traffic being controlled B. In the closed lane before stopping vehicle traffic C. In the traffic lane. D. As stated in "A" or "B" above. Answer: D. As stated in "A" or "B" above.
Q: Legally responsible officials are required to report category 1 sanitary sewer overflows?
A. Within 30 days B. Before end of the day C. As soon as possible D. Within 2 hours Answer: D. Within 2 hours
Q: When working in confined spaces or sewers, what form of lighting would you use?
A. Mirrors to direct the sunlight or explosion proof lighting. B. Ordinary electric lights C. Propane, Gas, or kerosene lanterns D. Special matches Answer: A. Mirrors to direct the sunlight or explosion proof lighting.
Q: What can happen if water-based substances are used to extinguish electrical fires?
a. Nothing but extinguish the fire b. The fumes are not harmful c. Receive an electrical shock d. They will corrode the electrical contacts
a. 3 b. 12 c. 7 d. 9
Q: The record log of hydraulic cleaning operation should include:
a. type and amount of material removed from downstream manhole. b. feet of rod used. c. camera malfunctions. d. feet of cable used.
Q: To test for pipe deflection and joint offset, you would conduct which of the following tests?
a. Smoke. b. Air. c. Mandrill. d. Water.
Q: While the CCTC is being pulled through the line, the:
a. camera must never stop. b. camera should be forced through any obstruction. c. operator must never stop looking at the monitor. d. operator must never use a tag line.
Q: If the camera becomes wedged during a video inspection, which of the following would be
your first step in solving the problem? a. Dig up the area where the camera is wedged. b. Attempt to free the camera with the tag line. c. Attach pull cable to a backhoe and pull is out. d. Wait awhile to see if it will free itself.
Q: A Category 1 SSO is:
a. any volume reaching surface waters. b. any volume entering a storm drain and not recovered. c. any spill greater than 1000 gallons. d. all of the above.
Q: In a 25 MPH zone, Distance of Flagger Station in Advance of the Work Space should be:
a. 155 feet
b. 15 feet c. 25 feet d. Unimportant
Q: A condition which can cause cavitation in a pump is:
a. an air leak on suction side. b. clear water being pumped. c. a fully opened suction valve. d. operating within design curve.
Q: Where is a check valve for a lift station pump installed?
a. Between the discharge isolation valve and the discharge port of the pump. b. Between the suction isolation valve and the line through the wet well wall. c. Between the suction port of the pump and the suction isolation valve for the pump. d. Downstream, just beyond the discharge isolation valve for the pump.
Q: Upon inspection of a lift station, an operator observes that the pump is not running and the
circuit breakers will not reset. Which of the following is most likely the cause? a. A misaligned belt drive. b. An improper wet well sensor adjustment. c. A clogged pump. d. A blown fuse.
Q: The electrical disconnect for a pumping station motor can trip out under which condition?
a. Pump cavitation. b. Low temperature. c. Strike by lightning. d. Worn packing.
Q: "enclosed", "open", and "semi-closed" are terms used to describe what pump part?
a. Stuffing box b. Lantern ring c. Impeller d. Bearings
Q: What is a typical bubbler type controller failure?
Q: A maintenance budget:
a. is not concerned with capitol replacement. b. does not consider equipment-operating conditions. c. must be justifiable. d. does not relate to future needs.
Q: Which of the following governs employee behavior?
a. Unions b. Rules prepared by the manager c. The grapevine d. The buddy system
Q: A good manager:
a. sets goals. b. waits for an emergency to happen. c. resists changes. d. blames others for his mistakes.
Q: Planning which covers a period of five to fifteen years is called:
a. scheduling. b. long range. c. updating. d. future modeling.
Q: The main purpose of a policy is to:
a. explain how higher management wants work done. b. excuse managers from making decisions. c. provide guidelines for not making decisions. d. provide coverage against loss.
Q: Performance appraisal forms:
a. should not be discussed with the employee. b. make the employee evaluation process consistent. c. should not contain a rating scale. d. must be limited to three judging factors.
Q: Who develops Material Safety Data sheets?
a. Management b. Manufacturer c. Salesman d. Safety officer
Q: Responsibilities of supervisors and managers for a safety program include:
a. not providing a written safety policy. b. never provide safety training. c. identify and correct unsafe work practices. d. never investigate accidents.
Q: What is the intent of the OSHA regulations?
a. To provide adequate staffing. b. To put managers in jail. c. To provide a safe work environment. d. To provide a safe home environment.
Q: What are the four major types of records a utility must maintain?
a. Equipment/maintenance, operations, procurement/inventory, personal. b. Equipment/maintenance, operations, procurement/inventory, personnel. c. Equipment/maintenance, operations, credit, personal. d. Equipment/maintenance, sales, procurement/inventory, personal.
Q: Behavior that is considered sexual harassment is:
a. invited, annoying, offensive, humiliating, hostile. b. non-hostile, invited, annoying, offensive, humiliating. c. uninvited, hostile, annoying, offensive, humiliating. d. uninvited, hostile, annoying, defensive, non-humiliating
Q: What is the best approach for field personnel to handle complaints from citizens?
a. Be trained to handle the more common ones and report the others to supervisors b. Refer all complaints to the manager's office c. Handle only if the time permits d. Ignore them
Q: The most important function of record keeping is:
a. record how much money was budgeted and how much was spent. b. record the past and provide a sound basis on which to plan the future. c. record what was done and when it was done. d. record where the company has been, and how they got where they are today.
Q: What should financial management provide for a collection system?
a. Capital improvement funds, careful budgeting, financial stability. b. Careful budgeting, financial stability, prudent investment of financial reserves. c. Careful budgeting, financial stability, lowest possible bond rates. d. Lowest possible bond rates, financial stability, capital improvement funds.
Q: An organization chart for a utility can be helpful for several reasons. Which of the following
is the least valid objective of an organization chart? a. To establish proper chain of command authority. b. To help develop a budget. c. To help in making up project schedules. d. To help in scheduling emergencies
