Liquid Fuels Systems-cdc3e452 (Vol.4)

66 Questions | Total Attempts: 84

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3e451 Quizzes & Trivia

Liquid Fuels Maintenance JourneymanCDC 3E451Volume 4: Operation and Maintenance of Mechanical System Components


Questions and Answers
  • 1. 
    (601) How many basic designs of gate valves are there?
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 2. 
    (602) How often do you inspect a gate valve for leaks?
    • A. 

      Weekly

    • B. 

      Monthly

    • C. 

      As required

    • D. 

      Not required

  • 3. 
    (601) During repacking, a gate valve should be placed in what position?
    • A. 

      Open

    • B. 

      Closed

    • C. 

      Either open or closed

    • D. 

      Intermediate between open and closed

  • 4. 
    (601) For large gate valves, what type of packing is best?
    • A. 

      Nylon

    • B. 

      Teflon

    • C. 

      Graphite

    • D. 

      Multi-layered cardboard

  • 5. 
    (602) What type of manual valve can be used to control the rate of product flow?
    • A. 

      Plug

    • B. 

      Gauge

    • C. 

      Check

    • D. 

      Globe

  • 6. 
    (602) The manual valve that can be repacked while the line is under pressure is the
    • A. 

      Ball

    • B. 

      Globe

    • C. 

      Resilient-liner plug

    • D. 

      Moveable seat plug

  • 7. 
    (602) What type packing is used around the valve stems of globe valves?
    • A. 

      Nylon

    • B. 

      Viton

    • C. 

      Teflon string

    • D. 

      Graphite

  • 8. 
    (603) How often do you operationally inspect a lubricated plug valve?
    • A. 

      Monthly

    • B. 

      Quarterly

    • C. 

      Annually

    • D. 

      As required

  • 9. 
    (603) What type of valve does not have to be removed from the pipeline during hydrostatic testing?
    • A. 

      Ball valve

    • B. 

      Gate valve

    • C. 

      Resilient liner plug valve

    • D. 

      Double block and bleed plug valve

  • 10. 
    (603) What prevents leakage past the hub of the resilient-liner plug valve?
    • A. 

      O-ring

    • B. 

      Diaphragm seal

    • C. 

      Asbestos gasket

    • D. 

      Graphite packing

  • 11. 
    (603) How often do non-lubricated plug valve have to be inspected for ease operation and leaks?
    • A. 

      Weekly

    • B. 

      Monthly

    • C. 

      Annually

    • D. 

      As required

  • 12. 
    (603) A 12-inch non-lubricated plug valve will have what type of operator?
    • A. 

      Lever

    • B. 

      Chain

    • C. 

      Wrench

    • D. 

      Worm gear

  • 13. 
    (603) What position must a General Twin Seal plug valve be in so that you can remove the valve operator?
    • A. 

      Open

    • B. 

      Closed

    • C. 

      Either open or closed

    • D. 

      Intermediate between open and closed

  • 14. 
    (604) Which of the following manual valves is a suitable substitute for a non-lubricated plug valve?
    • A. 

      Ball

    • B. 

      Globe

    • C. 

      Check

    • D. 

      Butterfly

  • 15. 
    (604) What type of valve used in fuel systems must be fire tested and qualified in accordance with the requirements of API standard 607 and operate from fully closed to fully open with a 90 degree rotation of the ball?
    • A. 

      Gate

    • B. 

      Ball

    • C. 

      Plug

    • D. 

      Globe

  • 16. 
    (604) How often do ball valves have to be inspected for ease of operation and leaks?
    • A. 

      Weekly

    • B. 

      Monthly

    • C. 

      Quarterly

    • D. 

      As required

  • 17. 
    (605) To conform to API Standard 6D, the seat and disc of which valve must be removable without removing the valve from the pipeline?
    • A. 

      Gate

    • B. 

      Plug

    • C. 

      Globe

    • D. 

      Check

  • 18. 
    (605) What type of valve requires the least amount of space?
    • A. 

      Ball

    • B. 

      Gate

    • C. 

      Check

    • D. 

      Butterfly

  • 19. 
    (605) What type of valve must be fully closed before you can remove it from the pipeline?
    • A. 

      Ball

    • B. 

      Gate

    • C. 

      Butterfly

    • D. 

      Non-lubricated plug

  • 20. 
    (606) Whom must you notify before you work on a fuel system that could interfere with the base flying mission?
    • A. 

      Wing safety

    • B. 

      Base operations

    • C. 

      Resource control center

    • D. 

      Command fuels engineer

  • 21. 
    (606) What specialized equipment must you have to ensure system integrity when removing a valve from the system?
    • A. 

      Locks

    • B. 

      Drip pans

    • C. 

      Blind flanges

    • D. 

      As built drawings

  • 22. 
    (606) Where would you find out which valves have to be isolated before removing a manual valve?
    • A. 

      Co-workers

    • B. 

      Shop supervisor

    • C. 

      As built drawings

    • D. 

      Air Force standard drawings

  • 23. 
    (606) How much fuel is in a 22-foot section of 6-inch pipe?
    • A. 

      11 gallons

    • B. 

      22 gallons

    • C. 

      33 gallons

    • D. 

      44 gallons

  • 24. 
    (606) When removing a manual valve from a pipeline, which bolts on the valve should you loosen first to drain the fuel drip pan?
    • A. 

      Top

    • B. 

      Bottom

    • C. 

      Left side

    • D. 

      Right side

  • 25. 
    (606) When reinstalling a manual valve, which bolts should you insert first?
    • A. 

      Top

    • B. 

      Bottom

    • C. 

      Left side

    • D. 

      Right side

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