Backflow Quiz 5

100 Questions | Total Attempts: 4235

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Backflow Quizzes & Trivia

This purpose of this quiz is to check your knowledge of backflow.


Questions and Answers
  • 1. 
    Which of the following is a means of controlling thermal expansion? 
    • A. 

      T& P relief valve

    • B. 

      Water hammer arrestor

    • C. 

      Pressure regulator after the meter

    • D. 

      Thermal expansion tank

  • 2. 
    • A. 

      21'

    • B. 

      26'

    • C. 

      30'

    • D. 

      34'

  • 3. 
    During normal operation, the relief valve on a Reduced Pressure Principle Backflow Preventer remains closed due to 
    • A. 

      Supply side pressure

    • B. 

      Direct cross-connection

    • C. 

      Zone pressure

    • D. 

      Check valve #1

  • 4. 
    What type of cross connection is a submerged hose bibb (with no hose attached) ? 
    • A. 

      Actual

    • B. 

      Potential

    • C. 

      Permanent

    • D. 

      None listed

  • 5. 
    What protects the potable water supply to a urinal equipped with a flushometer valve? 
    • A. 

      Reduced Pressure Principle Backflow Assembly

    • B. 

      Double Check Backflow Prevention Assembly

    • C. 

      Atmospheric Type Vacuum Breaker

    • D. 

      Pressure Vacuum Breaker Assembly

  • 6. 
    What is the purpose of the spring in the relief valve assembly of a Reduced Pressure Principle Backflow Preventer? 
    • A. 

      Force the relief valve open

    • B. 

      Force the relief valve closed

    • C. 

      Force the relief valve closed

    • D. 

      Both b & c

  • 7. 
    Which of the following is used to control thermal expansion problems? 
    • A. 

      Soft seating check valves

    • B. 

      Pressure relief valves

    • C. 

      Expansion tank

    • D. 

      Both b & c

  • 8. 
    What is the suggested minimum distance between the relief valve discharge port of a Reduced Pressure Principle Backflow Preventer assembly and the flood level rim of the surrounding area? 
    • A. 

      6"

    • B. 

      12"

    • C. 

      18"

    • D. 

      24"

  • 9. 
    During a field test of a Reduced Pressure Principle Backflow Preventer, you find a leaking #2 check valve, you should make the repairs and 
    • A. 

      Retest #2 check valve

    • B. 

      Retest entire assembly

    • C. 

      Retest #1 check valve

    • D. 

      Approve without retesting

  • 10. 
    What is the required type of protection between a potable water system and the building sewer? 
    • A. 

      Double Check Backflow Prevention Assembly

    • B. 

      Pressure Vacuum Breaker Assembly

    • C. 

      Air gap separation

    • D. 

      Backwater valve

  • 11. 
    What is the maximum flow temperature for the hose bibb vacuum breaker? 
    • A. 

      120 degrees

    • B. 

      140 degrees

    • C. 

      160 degrees

    • D. 

      180 degrees

  • 12. 
    Which of the following is NOT a cause of backpressure? 
    • A. 

      Elevated plumbing

    • B. 

      Thermal expansion

    • C. 

      Pumps

    • D. 

      Aspiration

  • 13. 
    What is the purpose of testing the different pressures on a backflow assembly? 
    • A. 

      Check spring tension

    • B. 

      Make sure check is seated

    • C. 

      Record for test report

    • D. 

      All listed

  • 14. 
    What is the minimal acceptable pressure differential across the check valves when testing a Double Check Detector Fire Protection Backflow Preventer Assembly? 
    • A. 

      0.5 psi

    • B. 

      1.0 psi

    • C. 

      2.0 psi

    • D. 

      3.0 psi

  • 15. 
    ASSE Standard 1037 (Flushometers for Plumbing Fixtures) requires a/an 
    • A. 

      Atmospheric vacuum breaker

    • B. 

      Reduced pressure principle assembly

    • C. 

      Air gap separation

    • D. 

      Double check valve assembly

  • 16. 
    When testing a Reduced Pressure Principle Backflow Preventer 
    • A. 

      The pressure drop across the 1st check valve must be 1 psid

    • B. 

      The pressure differential relief valve is hydraulically dependent & mechanically independent

    • C. 

      The pressure drop across the #2 check must be at least 5 psid

    • D. 

      The pressure in zone 2 (reduced pressure zone) must exceed supply pressure for the relief valve to discharge

  • 17. 
    If you find a Pressure Vacuum Breaker Assembly installed on a boiler feed line, what will you write-on your report? 
    • A. 

      A Pressure Vacuum Breaker Assembly should not be installed where it is subject to backpressure

    • B. 

      A Reduced Pressure Principle Assembly should be installed in place of the PVB

    • C. 

      A Double Check Backflow Prevention Assembly should be installed in place of the PVB

    • D. 

      Both a & b

  • 18. 
    Which test cock may be opened to establish flow through a backflow prevention assembly? 
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 19. 
    _____________ is an increase of pressure in a closed system due to the heating and expanding of water. 
    • A. 

      Relief valve

    • B. 

      Backpressure

    • C. 

      Thermal expansion

    • D. 

      BTU

  • 20. 
    Which of the following cannot have a shutoff valve installed downstream? 
    • A. 

      Air gap

    • B. 

      Pressure Vacuum Breaker Assembly

    • C. 

      Atmospheric Type Vacuum Breaker

    • D. 

      Double Check Backflow Prevention Assembly

  • 21. 
    A Hose Connection Backflow Preventer is a high-hazard protection valve that contains 2…… 
    • A. 

      Check valves

    • B. 

      Isolation valves

    • C. 

      Vent ports

    • D. 

      Intermediate zone pressure

  • 22. 
    _________________ should be considered when installing a cross connection control device 
    • A. 

      Sidewall clearances

    • B. 

      Degree of hazard

    • C. 

      Distance of backflow device from the floor level

    • D. 

      All listed

  • 23. 
    A sub-atmospheric pressure can also be referred to as 
    • A. 

      Psid

    • B. 

      Psia

    • C. 

      Backpressure

    • D. 

      Vacuum

  • 24. 
    A carbonated beverage machine requires a Backflow Preventer for Beverage Dispensing Equipment. This protection is needed because of           
    • A. 

      The carbon dioxide gas

    • B. 

      The increased acidity of the water

    • C. 

      The higher pH level affecting the copper pipe

    • D. 

      All listed

  • 25. 
    Thermal expansion       …….. 
    • A. 

      Is the pressure increase which occurs in a piping system every time a water heater comes on to recover the temperature lost through the usage of hot water

    • B. 

      Occurs in any hot water system when water is heated or recovered during periods of non-use

    • C. 

      Can cause a dangerous increase in pressure

    • D. 

      All listed