California Water Distribution Operator Exam, Water Mains and Piping: all 36 questions
All questions from the Water Mains and Piping section for California Water Distribution Operator Exam, each with the correct answer.
- 5001Which of these pipe materials is used for gravity sewers rather than pressurized water mains?
- 5002What is a main advantage of ductile iron pipe?
- 5003Why is polyethylene encasement used on ductile iron pipe?
- 5004Which pipe material resists corrosion but can become brittle in sunlight and must be stored out of UV exposure?
- 5005Why must asbestos-cement (AC) pipe be cut with wet methods or hand tools?
- 5006Which pipes are likely to have lead solder or lead goosenecks in older service lines?
- 5007Which is the main reason to keep mains and service lines of dissimilar metals separated by dielectric fittings?
- 5008What is the purpose of flushing a main?
- 5009Who should be notified before a planned flushing program?
- 5010What is a typical sign of a main break?
- 5011Which method is used to locate a buried metallic pipe?
- 5012What is the purpose of a tracer wire installed with plastic pipe?
- 5013How is a temporary service set up during a main repair?
- 5014Which practice prevents contamination of a pipe being installed?
- 5015What is the correct way to lower a heavy pipe section into a trench?
- 5016What should be done with wet or unstable soil at the bottom of a trench before laying pipe?
- 5017Which equipment is used to compact backfill in layers?
- 5018What does a tapping machine do?
- 5019Which factor determines the tap size relative to the main?
- 5020What is the purpose of a corporation stop?
- 5021Where is a curb stop usually located?
- 5022Why should a new service line be flushed before the meter is installed?
- 5023Which pipe fitting changes a line's direction?
- 5024Which fitting would be used to connect two pipes of different diameters?
- 5025Which kind of joint allows a pipeline to deflect slightly and absorb ground movement?
- 5026What is the C-factor (Hazen-Williams coefficient) a measure of?
- 5027Which C-factor best fits new PVC pipe?
- 5028What causes tuberculation inside iron pipe?
- 5029Which effect results from heavy tuberculation?
- 5030Which method can clean a main by pushing a foam swab through it?
- 5031How is a leak in a buried main commonly pinpointed?
- 5032Which factor makes leak detection by sound more difficult?
- 5033What is the purpose of a thrust block's size calculation?
- 5034Under 22 CCR 64570, which AWWA standard applies to the installation of newly installed ductile iron water mains?
- 5035Which soil type is the most difficult for trench stability?
- 5036What is the purpose of dewatering in a trench?