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CWEA Collections System Maintenance
Grade 3 QUESTIONS WITH 100%
CORRECT ANSWERS. GRADE +
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. - CORRECT ANSWER -D. As stated in "A" or
"B" above. 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 - CORRECT ANSWER -D. Within 2 hours
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 - CORRECT ANSWER -A. Mirrors to direct the sunlight or
explosion proof lighting. 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 - CORRECT ANSWER -c. Receive an
electrical shock When testing a manhole for explosive gases when should the first tests be made? a. After removing the manhole cover b. Before removing the manhole cover c. At any time
d. After ventilation - CORRECT ANSWER -b. Before removing the manhole
cover Atmospheric hazards encountered in manholes can include:
a. non-explosive atmospheres. b. non-toxic atmosphere. c. lack of oxygen.
d. non-flammable atmospheres. - CORRECT ANSWER -c. lack of oxygen.
When setting up to ventilate a manhole, the air inlet should be how many feet above street level? a. 4. b. 3. c. 2.
d. 1.0 - CORRECT ANSWER -c. 2.
Which chemical may be used for odor control in a sewer system? a. Calcium chloride b. Hydrogen peroxide c. Oxidized aluminum
d. Sodium chloride - CORRECT ANSWER -b. Hydrogen peroxide
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. - CORRECT ANSWER -c. Signature of person who
locked out switch and who is the only person authorized to remove tag. 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. - CORRECT ANSWER -a. At least once a year in a
simulated situation or by the satisfactory performance of an actual rescue. 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. - CORRECT
ANSWER -a. Has or may contain atmospheric, engulfment, design, or other serious
health/safety hazard.
c. Combination unit
d. Bucket machine - CORRECT ANSWER -c. Combination unit
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. - CORRECT ANSWER -a. A ball forced through a
sewer line. When pouring a concrete slab, which of the following tools is used to finish the concrete? a. Grasshopper. b. Tamper. c. Trowel.
d. Vibrator. - CORRECT ANSWER -c. Trowel.
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. - CORRECT ANSWER -c. Pickup tool.
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 - CORRECT ANSWER -a. Crowding
of other underground utilities. 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. - CORRECT
ANSWER -c. Measuring the time it takes for the dye to be carried by the wastewater
between the two manholes. 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. - CORRECT ANSWER -b. Corrected construction
drawings showing changes made in the field installation. 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.
d. sloped 1:1. - CORRECT ANSWER -a. sloped 3:1.
When a water main must be laid under a sewer main, the sewer pipe must be: a. lined with epoxy. b. cleaned carefully. c. replaced with water type pipe with pressure tight joints.
d. taken out while the water main is being installed. - CORRECT ANSWER -c.
replaced with water type pipe with pressure tight joints. Hydrogen peroxide controls odors in sewers by: a. decreasing the dissolved oxygen. b. neutralizing the PH. c. oxidizing sulfide compounds.
d. providing a source of hydrogen ions. - CORRECT ANSWER -c. oxidizing
sulfide compounds. Construction of a wastewater pipeline under a highway or railway without disrupting the traffic is done by? a. Drag lining. b. Dredging. c. Embankment excavation.
d. Boring and jacking. - CORRECT ANSWER -d. Boring and jacking.
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. -
CORRECT ANSWER -c. Have the water main adjusted and hold the grade on
the sewer main. 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.
Repairs to manholes include: a. adjusting the alignment. b. correcting cavitation damages. c. raising frame and cover to grade.
d. tightening packing - CORRECT ANSWER -c. raising frame and cover to
grade. Liners are installed in sewers to correct problems caused by: a. grade alignment. b. grease. c. grit.
d. infiltration. - CORRECT ANSWER -d. infiltration.
A kilowatt is the equivalent of: a. 0.67 amperes at a voltage of 120. b. 1.34 horsepower. c. 746 watts.
d. 1,000 megacycles. - CORRECT ANSWER -b. 1.34 horsepower.
What factors should be considered when providing trench shoring? a. Grade of sewer. b. Pipe material. c. Structures or sources of vibration near trenches.
d. Cost of shoring. - CORRECT ANSWER -c. Structures or sources of vibration
near trenches. 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. - CORRECT ANSWER -a. allows
decomposable solids to settle. 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. - CORRECT ANSWER -d. evaluate
the effectiveness of the results. Improper connections can be detected through: a. DO tests.
b. soundings. c. TV inspection.
d. radar. - CORRECT ANSWER -c. TV inspection.
Which of these pH readings indicates an acidic wastewater? a. 3 b. 12 c. 7
d. 9 - CORRECT ANSWER -
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. - CORRECT ANSWER -
To test for pipe deflection and joint offset, you would conduct which of the following tests? a. Smoke. b. Air. c. Mandrill.
d. Water. - CORRECT ANSWER -
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. - CORRECT ANSWER -
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. - CORRECT ANSWER -
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. - CORRECT ANSWER -
In a 25 MPH zone, Distance of Flagger Station in Advance of the Work Space should be: a. 155 feet
a. Piston b. Ejector c. Centrifugal
d. Diaphragm - CORRECT ANSWER -
Vibrations in pumps may be caused by improper motor-pump: a. alignment. b. curves. c. piping.
d. power factor. - CORRECT ANSWER -
What type of pump is not seriously damaged if the discharge valve is closed for a short time while the pump is running? a. Centrifugal pump. b. Diaphragm pump. c. Piston pump.
d. Plunger pump. - CORRECT ANSWER -
A mechanical ventilation system in a lift station wet well should be able to exchange the air in the wet well how many times an hour? a. 10 b. 20 c. 30
d. 60 - CORRECT ANSWER -
A pump is pumping less than its expected rate of discharge. What could be the cause? a. Speed of motor too high. b. Pump is primed. c. Impeller clogged.
d. Discharge head too low. - CORRECT ANSWER -
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. - CORRECT ANSWER -
Which of the following governs employee behavior? a. Unions b. Rules prepared by the manager c. The grapevine
d. The buddy system - CORRECT ANSWER -
A good manager:
a. sets goals. b. waits for an emergency to happen. c. resists changes.
d. blames others for his mistakes. - CORRECT ANSWER -
Planning which covers a period of five to fifteen years is called: a. scheduling. b. long range. c. updating.
d. future modeling. - CORRECT ANSWER -
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. - CORRECT ANSWER -
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. - CORRECT ANSWER -
Who develops Material Safety Data sheets? a. Management b. Manufacturer c. Salesman
d. Safety officer - CORRECT ANSWER -
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. - CORRECT ANSWER -
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. - CORRECT ANSWER -
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.
a. Age b. Education level c. Minority classification
d. Gender - CORRECT ANSWER -
The best way to record all work is done through a: a. closed circuit TV. b. Polaroid system. c. tape recorder.
d. work order system - CORRECT ANSWER -
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. -
CORRECT ANSWER -
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. -
CORRECT ANSWER -
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 - CORRECT ANSWER -
