Pipe Laying, Trenching, Miscellaneous

100 Questions | Total Attempts: 221

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Pipe Laying, Trenching, Miscellaneous

Questions and Answers
  • 1. 
    In general, why is no shoring required for water trenches?
    • A. 

      They are planned for stable ground.

    • B. 

      They are usually less than 5 ft deep.

    • C. 

      Sloping is required instead of shoring.

    • D. 

      Shielding is required instead of shoring.

  • 2. 
    What is the minimum cover over water pipes?
    • A. 

      24 inches

    • B. 

      32 inches

    • C. 

      42 inches

    • D. 

      36 inches

  • 3. 
    What equipment is used to trench rock and hardpan? 
    • A. 

      Excavator with carbide tipped breaker

    • B. 

      Dozer

    • C. 

      Dragline

    • D. 

      Vermeer trencher with carbide tipped teeth

  • 4. 
    What does the surveyor stakes represent? 
    • A. 

      Flow line only

    • B. 

      The undercut for bedding material

    • C. 

      Off-set of flow line

    • D. 

      Cut and fill

  • 5. 
    What must the grade setter do to prepare for cut when reviewing surveyor’s stakes? 
    • A. 

      Consult engineer or inspector to review before cutting

    • B. 

      Calculate the flow line from the surveyor's off-set

    • C. 

      Cut exactly where surveyor has indicated on his stakes

    • D. 

      Add the thickness of pipe and bedding material to cut

  • 6. 
    Which pipe can no longer be used in laying water pipe? 
    • A. 

      PVC

    • B. 

      Ductile iron

    • C. 

      Asbestos cement

    • D. 

      Cast iron

  • 7. 
    What is on the opposite end of the bell of a pipe? 
    • A. 

      Flat end

    • B. 

      Mouth

    • C. 

      Spigot

    • D. 

      Lead

  • 8. 
    Pipes over ___” generally require mechanical fittings (flange, gasket, bolts
    • A. 

      6"

    • B. 

      8"

    • C. 

      10"

    • D. 

      12"

  • 9. 
    When are mechanical couplings required? 
    • A. 

      On all pipes

    • B. 

      Larger pipes only

    • C. 

      Smaller pipes only

    • D. 

      Depends on engineer's specifications

  • 10. 
    When are watertight plugs placed onto ends of pipe to protect from debris and animals? 
    • A. 

      When not in use

    • B. 

      End of week

    • C. 

      End of shift

    • D. 

      None of the above

  • 11. 
    How can time be saved working with small pipes as opposed to large pipes? 
    • A. 

      Smaller pipes do not require as much inspection and testing.

    • B. 

      Smaller pipes can always be moved by hand.

    • C. 

      Smaller pipes can be transferred directly from boom truck into trench.

    • D. 

      All of the above

  • 12. 
    What type of tablet is needed to kill bacteria when pipe is filled with water?
    • A. 

      Florine

    • B. 

      Chlorine

    • C. 

      Bleach

    • D. 

      Ammonia

  • 13. 
    What is the purpose of running insulated wire along the service line? 
    • A. 

      To connect electrical utility connection.

    • B. 

      It is not required to run wire along service line.

    • C. 

      It is necessary to feed electrical water valve along service line.

    • D. 

      Line can later be detected by metal detector.

  • 14. 
    What size of insulated wire is required to run from service line?
    • A. 

      14 gauge

    • B. 

      12 gauge

    • C. 

      10 gauge

    • D. 

      8 gauge

  • 15. 
    Why is wire necessary instead of just pipe for detection? 
    • A. 

      Most service pipes are made of polyethylene or type K copper.

    • B. 

      Most service pipes are made of clay.

    • C. 

      Most service pipes are made of cast-in-place concrete conduits.

    • D. 

      Most service pipes are too deep to be detected without wire.

  • 16. 
    What is installed on the main line to connect to the service line?
    • A. 

      Waddle strap

    • B. 

      Strap saddle

    • C. 

      Main strap connection

    • D. 

      Cradle gurney

  • 17. 
    What component goes in between main line and property water meter? 
    • A. 

      Component stop

    • B. 

      Stop plug

    • C. 

      Stop connection

    • D. 

      Corporation stop

  • 18. 
    What is color code for electric? 
    • A. 

      Red

    • B. 

      Blue

    • C. 

      Yellow

    • D. 

      Green

  • 19. 
    What does yellow represent? 
    • A. 

      Sewer

    • B. 

      Gas

    • C. 

      Communication

    • D. 

      Storm Drain

  • 20. 
    What does orange represent? 
    • A. 

      Gas

    • B. 

      Electric

    • C. 

      Communication

    • D. 

      Potable water

  • 21. 
    What is color code for potable water? 
    • A. 

      Green

    • B. 

      White

    • C. 

      Yellow

    • D. 

      Blue

  • 22. 
    What does green represent? 
    • A. 

      Sewer

    • B. 

      Water

    • C. 

      Storm Drain

    • D. 

      Communication

  • 23. 
    What is used to join new water line with old for testing before new can be approved for use? 
    • A. 

      Nothing. New cannot be connected to old until approved independently.

    • B. 

      Connected by pipe with a blowoff on old side and a blowoff on new side

    • C. 

      Connected by a strap saddle.

    • D. 

      Connected by a temporary pressure release valve.

  • 24. 
    How many hours of testing is required for water line?
    • A. 

      6 hours

    • B. 

      12 hours

    • C. 

      24 hours

    • D. 

      48 hours

  • 25. 
    How many pounds per square inch (PSI) is required for testing water line? 
    • A. 

      100 psi

    • B. 

      120 psi

    • C. 

      140 psi

    • D. 

      150 psi

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