Plumbing Competency Preparation

26 Questions

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Plumbing Quizzes & Trivia

This quiz tests general plumbing knowledge.


Questions and Answers
  • 1. 
    When are hot and cold shower valves identical?
    • A. 

      Always

    • B. 

      Never

    • C. 

      Sometimes

    • D. 

      Not Sure

  • 2. 
    When can a diverter valve replace a hot or cold shower valve?
    • A. 

      Always

    • B. 

      Never

    • C. 

      Sometimes

    • D. 

      Not Sure

  • 3. 
    Stem  packing is used when leaking occurs at which location?
    • A. 

      Tub Spout

    • B. 

      Shower valve

    • C. 

      Drain

    • D. 

      Shower Head

  • 4. 
    Where is the cold water valve located?
    • A. 

      Left Side

    • B. 

      Right Side

    • C. 

      Center

    • D. 

      Bottom

  • 5. 
    What do all toilets have built into them?
    • A. 

      Anti-Syphon Valve

    • B. 

      P-Trap

    • C. 

      T P valve

    • D. 

      Shut-Off valve

  • 6. 
    What can never be re-used when replacing a toilet?
    • A. 

      Flange Bolts

    • B. 

      Wax Ring

    • C. 

      Plastic Shims

    • D. 

      Closet Flange

  • 7. 
    How many p-traps does a double kitchen sink require?
    • A. 

      One

    • B. 

      Two

    • C. 

      Three

    • D. 

      Four

  • 8. 
    What fits between a closet flange and toilet bowl?
    • A. 

      Spud washer

    • B. 

      Wax Ring

    • C. 

      O-Ring

    • D. 

      Lock Washer

  • 9. 
    What connects a P-Trap to the drain?
    • A. 

      Coupling

    • B. 

      Elbow

    • C. 

      Trap Adaptor

    • D. 

      Union

  • 10. 
    Where can the size of a P-Trap be changed?
    • A. 

      J-Bend

    • B. 

      Wall

    • C. 

      Both the J-bend and the wall

    • D. 

      Neither the j-bend or the wall

  • 11. 
    The tail piece on a lavatory is what diameter?
    • A. 

      1 1/2"

    • B. 

      1 1/4"

    • C. 

      2 1/2"

    • D. 

      2 1/4"

  • 12. 
    The tail piece on a kitchen sink is what diameter?
    • A. 

      1 1/2"

    • B. 

      1 1/4"

    • C. 

      2 1/2"

    • D. 

      2 1/4"

  • 13. 
    What color of flame is best for soldering?
    • A. 

      Red

    • B. 

      Yellow

    • C. 

      Blue

    • D. 

      Orange

  • 14. 
    What must be applied to a copper fitting and copper pipe before soldering?
    • A. 

      Water

    • B. 

      Oil

    • C. 

      Flux

    • D. 

      Glue

  • 15. 
    What substance is not permitted in solder which is used for water supply pipes?
    • A. 

      Tin

    • B. 

      Brass

    • C. 

      Lead

    • D. 

      Steel

  • 16. 
    What is the slope most often required for drainage?
    • A. 

      1/4" per foot

    • B. 

      1/2" per foot

    • C. 

      3/4" per foot

    • D. 

      1" per foot

  • 17. 
    What type of adhesive is used to connect PVC pipe and fittings?
    • A. 

      Elmers Glue

    • B. 

      Silicone

    • C. 

      Solvent Glue

    • D. 

      JB Weld

  • 18. 
    PSI is the abbreviation for what?
    • A. 

      Pressure Side In

    • B. 

      Pounds per Square Inch

    • C. 

      Plumbing Safety Inquiry

    • D. 

      Pounds per Square Foot

  • 19. 
    The anode rod on a water heater is made of what material?
    • A. 

      Copper

    • B. 

      Magnesium

    • C. 

      Galvanized Pipe

    • D. 

      Plastic

  • 20. 
    The safety valve on a water heater is called what?
    • A. 

      Anti-Syphon valve

    • B. 

      Shut-off Valve

    • C. 

      Drain Valve

    • D. 

      TP valve

  • 21. 
    The drain valve on a water heater has what kind of thread?
    • A. 

      Standard Pipe Thread

    • B. 

      Compression Thread

    • C. 

      Garden Hose Thread

    • D. 

      Fine Thread

  • 22. 
    A 50 gallon water heater is operated by how many volts?
    • A. 

      120 volts

    • B. 

      240 volts

    • C. 

      360 volts

    • D. 

      115 volts

  • 23. 
    How many thermostats does an electric water heater have?
    • A. 

      One

    • B. 

      Two

    • C. 

      Three

    • D. 

      None

  • 24. 
    The water supply pipe that enters and leaves a water heater is what size?
    • A. 

      1/4"

    • B. 

      1/2"

    • C. 

      3/4"

    • D. 

      1"

  • 25. 
    What is used to unclog a toilet?
    • A. 

      Mechanical Power Auger

    • B. 

      Closet Auger

    • C. 

      Fish Tape

    • D. 

      Garden Hose

  • 26. 
    A dip tube is located on what type of water heater?
    • A. 

      Gas Water Heater

    • B. 

      Electric Water Heater

    • C. 

      Both Gas & Electric Water Heater

    • D. 

      None of the Above