Liquid Fuels Systems-cdc3e452 (Vol.5)

122 Questions | Total Attempts: 71

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CDC Quizzes & Trivia

Liquid Fuels Systems Maintenance JourneymanVolume 5: Operation and Maintenance of Hydrant System ComponentsCDC 3E452


Questions and Answers
  • 1. 
    (801) The Class 1, Division 2, hazardous area around a service station dispenser extends outward how many feet and upward how many inches?
    • A. 

      20 feet, 18 inches

    • B. 

      20 feet, 24 inches

    • C. 

      50 feet, 18 inches

    • D. 

      50 feet, 24 inches

  • 2. 
    (801) What type of electrical units and wiring is used in nonhazardous locations, such as pressurized control rooms?
    • A. 

      Explosion-proof, enclosed type

    • B. 

      General-purpose, enclosed type

    • C. 

      Explosion-proof, non-enclosed type

    • D. 

      General-purpose, non-enclosed type

  • 3. 
    (801) What type of ground rod, if any, is used on a horizontal fuel tank installed under the pump-house floor?
    • A. 

      Copper

    • B. 

      Galvanized

    • C. 

      Stainless steel

    • D. 

      Not required

  • 4. 
    (802) The Pritchard system control room has how many electrical panels? For what are they used?
    • A. 

      2; pump control and pump selector

    • B. 

      2; pump selector and transformer selector

    • C. 

      3; pump control, pump selector, and defuel pumps

    • D. 

      3; pump control, transformer selector, and pump selector

  • 5. 
    (802) The positions of the pump control selector switch are
    • A. 

      HAND/OFF.

    • B. 

      HAND/AUTO.

    • C. 

      HAND/OFF/AUTO

    • D. 

      HAND/OFF/MANUAL

  • 6. 
    (803) Emergency stop switches at a truck loading header must be no closer than how many feet?
    • A. 

      10

    • B. 

      25

    • C. 

      50

    • D. 

      100

  • 7. 
    (803) The emergency stop switches have what type of contacts and complete which circuits?
    • A. 

      Open; low-voltage for the fuel transfer pump control

    • B. 

      Closed; low-voltage for the fuel transfer pump control

    • C. 

      Open; high-voltage for the fuel transfer pump control

    • D. 

      Closed; high-voltage for the fuel transfer pump control

  • 8. 
    (803) Emergency stop switches are painted what color?
    • A. 

      Red

    • B. 

      Amber

    • C. 

      Orange

    • D. 

      Yellow

  • 9. 
    (804) Which of the following should you check first if a pump motor will not start or hum?
    • A. 

      Fuses

    • B. 

      Relays

    • C. 

      Fuel level

    • D. 

      Control panel setup

  • 10. 
    (805) What do most emergency service calls involve?
    • A. 

      Electrical shorts

    • B. 

      No delivery of fuel

    • C. 

      Minor leaks

    • D. 

      Jammed valves

  • 11. 
    (805) If the pump is running, what should be your first stop in diagnosing a fuel delivery problem?
    • A. 

      Pump

    • B. 

      Valves

    • C. 

      As-built drawing

    • D. 

      Fuel storage tank

  • 12. 
    (806) How many hydrant outlet are normally installed for each 302AF fueling and defueling valve?
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 13. 
    (806) The defuel line in the Panero hydrant system pit has a 'U' bend to
    • A. 

      Allow for expansion

    • B. 

      Absorb hydraulic shock

    • C. 

      Keep the entire line from draining

    • D. 

      Provide a place for priming the pump

  • 14. 
    (807) What component aids in opening the 302AF fueling and defueling valve?
    • A. 

      VPI

    • B. 

      Hytrol

    • C. 

      Ejector

    • D. 

      Ejector-strainer

  • 15. 
    (807) What part on the 302AF fueling and defueling valve restricts the flow of fuel in the control tubing and under normal conditions will not close?
    • A. 

      Ejector-strainer

    • B. 

      CV flow control

    • C. 

      Pressure relief control (CRL)

    • D. 

      Pressure reducing control (CRD)

  • 16. 
    (807) What indicated leakage past the diaphragm on the pressure relief control?
    • A. 

      Uncontrolled downstream flow

    • B. 

      Fuel leakage from the vent port

    • C. 

      Uncontrolled downstream pressure

    • D. 

      Fuel leaking from the disc removal plug

  • 17. 
    (807) What component closes the refueling side of the 302AF fueling and defueling valve when there is excess flow at the hydrant outlet?
    • A. 

      CRD

    • B. 

      CDHS-3

    • C. 

      Loading CRL

    • D. 

      CV flow control

  • 18. 
    (807) The primary purpose of the orifice plate on the 302AF fueling and defueling valve is to create a differential pressure
    • A. 

      To operate the CDHS-2

    • B. 

      To operate the CDHS-3

    • C. 

      To operate the CDHS-4

    • D. 

      To operate the CDHS-5

  • 19. 
    (807) During refueling, which 302AF fueling and defueling valve component is responsible for closing the defuel side of the main valve?
    • A. 

      Loading CRL

    • B. 

      CDHS-3

    • C. 

      Solenoid

    • D. 

      Hytrol

  • 20. 
    (808) When yo adjust the unloading CRL on the 302AF fueling and defueling valve, at what pressure do you set the CRL?
    • A. 

      5 psi above NOP

    • B. 

      10 psi above NOP

    • C. 

      5 psi above NIP

    • D. 

      10 psi above NIP

  • 21. 
    (808) When you adjust the 302AF fueling and defueling valve, at what rate do you set the CV flow control?
    • A. 

      10 seconds

    • B. 

      20 seconds

    • C. 

      30 seconds

    • D. 

      40 seconds

  • 22. 
    (808) In order to calculate the differential pressure required to adjust the CDHS-3 properly, you need to know the
    • A. 

      Upstream pressure and flow rate

    • B. 

      Orifice-plate size and downstream pressure

    • C. 

      Upstream pressure and downstream pressure

    • D. 

      Gallons-per-minute delivery and orifice-plate bore size

  • 23. 
    (809) What would happen if the vacuum breaker on a hose coupling failed to open?
    • A. 

      Refueling could not be done

    • B. 

      Defueling could not be done

    • C. 

      Fuel from the hydrant outlet and fueling hose would not drain properly

    • D. 

      A constant delivery of pressure to the hydrant outlet could not be maintained

  • 24. 
    (809) The magnetic switch at the hydrant in the modified Panero system energizes the
    • A. 

      302AF solenoid only

    • B. 

      Deep-well pump only

    • C. 

      302AF solenoid and defueling pump

    • D. 

      302AF solenoid and deep-well turbine pumps

  • 25. 
    (809) Which of these would remedy leakage on the Philadelphia hydrant adapter?
    • A. 

      Replace the poppet

    • B. 

      Replace the stem guide

    • C. 

      Replace the flange gasket

    • D. 

      Replace the disc and seat

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