3e451 Volume 3 Operation And Maintenance Of Hydrant Systems And Components

100 Questions | Total Attempts: 354

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3e451 Quizzes & Trivia

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Questions and Answers
  • 1. 
    (401) What positions are on the pump control switch?
    • A. 

      Hand/off

    • B. 

      Hand/auto

    • C. 

      Hand/off/auto

    • D. 

      Hand/off/manual

  • 2. 
    (401) The pressure/flow recorder indicates which of the following?
    • A. 

      System pressure and issue flow rate

    • B. 

      System pressure and issue/return flow rates

    • C. 

      Issue/return flow rates and tank liquid level

    • D. 

      Filter/separator differential pressure and tank liquid level

  • 3. 
    (402) Most emergency service calls involve
    • A. 

      Electrical shorts

    • B. 

      No fuel delivery

    • C. 

      Minor leaks

    • D. 

      Jammed valves

  • 4. 
    (403) How many hydrant outlets are served by each panero pit?
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 5. 
    (404) When operating normally, what part of the 302AF fueling/defueling valve restricts the flow of fuel in the control tubing and will not close?
    • A. 

      Ejector strainer

    • B. 

      CV flow control

    • C. 

      Pressure relief control

    • D. 

      Pressure-reducing control

  • 6. 
    (404) A damaged diaphragm on the pressure reducing control is indicated by?
    • A. 

      An uncontrolled downstream flow

    • B. 

      A fuel leakage from the vent port

    • C. 

      Uncontrolled downstream pressure

    • D. 

      Fuel leaking from the disc removal plug

  • 7. 
    (404) What component closes the main valve of the 302AF fueling/defueling valve when there is excess flow at the hydrant outlet?
    • A. 

      CRD

    • B. 

      CDHS-3

    • C. 

      Loaded CRL

    • D. 

      CV flow control

  • 8. 
    (404) The primary purpose of the orifice plate on the 302AF fueling and defueling valve is to create differential
    • A. 

      Pressure to operate the CDHS-2

    • B. 

      Pressure to operate the CDHS-3

    • C. 

      Flow to operate the CDHS-2

    • D. 

      Flow to operate the CDHS-3

  • 9. 
    (404) During refueling, which 302AF fueling and defueling valve component holds the defuel side of the main valve component closed?
    • A. 

      Loaded CRL

    • B. 

      CDHS-3

    • C. 

      Solenoid

    • D. 

      Hytrol

  • 10. 
    (405) The first adjustment you make , when setting the pressure on a 302AF fueling and defueling valve, is establishing a pressure gauge reading of 10 psi above the desired delivery pressure. You do this by turning the adjustment screw on the
    • A. 

      Pressure-reducing control (CRD) closkwise

    • B. 

      Loading pressure-relief control (CRL) clockwise

    • C. 

      CRD counterclockwise

    • D. 

      Loading CRL counterclockwise

  • 11. 
    (405) What delivery pressure causes the fueling side, of the 302AF  fueling and defueling valve, to close when turning the adjustment screw on the loading pressure relief controller counterclockwise?
    • A. 

      5 psi above normal inlet pressure

    • B. 

      5 psi above normal operating pressure

    • C. 

      10 psi above normal inlet pressure

    • D. 

      10 psi above normal operating pressure

  • 12. 
    (405) Approximately how long do you want it to take the fueling valve to open when you adjust the CV flow control on the 302AF fueling and defueling valve?
    • A. 

      10 seconds

    • B. 

      20 seconds

    • C. 

      30 seconds

    • D. 

      40 seconds

  • 13. 
    (406) What components are magnetized when you place a magnet on the refuel contact points at the hydrant on the modified panero system?
    • A. 

      The 302AF electrical solenoid only

    • B. 

      The deep-well pump only

    • C. 

      The 302AF solenoid and the defueling pump

    • D. 

      The deep-well turbine pump and the 302AF electrical solenoid

  • 14. 
    (406) To remedy a leakage on the Philidelphia hydrant adapter, which one of the following would you usually replace?
    • A. 

      The coupling poppet

    • B. 

      The vacuum breaker

    • C. 

      The flange gasket

    • D. 

      The solenoid

  • 15. 
    (407) How many manual valves are found in the lateral control pit of the Pritchard system?
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 16. 
    (407) When you place a magnet on the defuel magnetic control switch, during defueling, the solenoid on the
    • A. 

      Refueling control valve and defueling valve are energized

    • B. 

      Defueling control valve and the defueling pump are energized

    • C. 

      Rate-of-flow control valve and defuel pump are energized

    • D. 

      Defueling control valve and deep-well turbine pumps are energized

  • 17. 
    (407) What lateral control pit component automatically cuts off the defuel pump when a predetermined amount of inches of mercury is reached?
    • A. 

      Solenoid control switch

    • B. 

      Pump circuit breaker

    • C. 

      Vacuum control switch

    • D. 

      Panel selector switch

  • 18. 
    (408) When the cover chamber pressure on the 90AF-8 refueling control valve is at least as great as the inlet pressure, the valve will
    • A. 

      Pulsate

    • B. 

      Modulate

    • C. 

      Open fully

    • D. 

      Close fully

  • 19. 
    (408) If the cover chamber pressure on the 90AF-8 refueling control valve stays between the inlet and outlet pressure, the valve
    • A. 

      Pulsates

    • B. 

      Modulates

    • C. 

      Opens fully

    • D. 

      Closes fully

  • 20. 
    (408) What happens to the auxiliary hytrols A and B, on the 90AF-8 refueling control valve, when excess flow trips the CDHS-3 pressure differential control?
    • A. 

      A and B close

    • B. 

      A and B open

    • C. 

      A opens and B closes

    • D. 

      A closes and B opens

  • 21. 
    (408) The pressure relief control, on the 90AF-8 is set to
    • A. 

      5 pounds per square inch (psi) higher than the normal operating pressure

    • B. 

      5 psi higher than the inlet pressure of the 90AF-8

    • C. 

      5 psi higher than the 51AF-4

    • D. 

      5 higher than the normal inlet pressure of the 51AF-4

  • 22. 
    (409) What pressure rate must you establish before setting the pressure relief control on the 90AF-8 refueling control valve?
    • A. 

      2 to 3 pounds per square inch (psi) above normal downstream pressure

    • B. 

      2 to 3 psi above normal upstream pressure

    • C. 

      5 psi above normal downstream pressure

    • D. 

      5 psi above normal upstream pressure

  • 23. 
    (409) Which of the following would probably cause the 90AF-8 refueling control valve to open, then close?
    • A. 

      Auxiliary hytrol A closing

    • B. 

      CDHS-3 tripping

    • C. 

      Solenoid never energizing

    • D. 

      Pressure relief control set too high

  • 24. 
    (409) If the 90AF-8 refueling control valve fails to control delivery pressure, which trouble could cause the problem?
    • A. 

      The solenoid is not energized

    • B. 

      A ruptured diaphragm in hytrol A

    • C. 

      The CV flow control is not set properly

    • D. 

      The pressure relief control is set too low

  • 25. 
    (410) Which statement best describes what is removed from the strainer orifice used on the 50AF-2 pressure relief valve?
    • A. 

      Only the primary jet

    • B. 

      Only the secondary jet

    • C. 

      The primary and secondary jets

    • D. 

      Neither the primary nor the secondary jets

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