Advanced Mechanical Seal Quiz #2

15 Questions | Total Attempts: 41

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Advanced Mechanical Seal Quiz #2

Advanced Seal Quiz #2


Questions and Answers
  • 1. 
    A 170 seal can be used up to 40% solids with no flush in what type of slurry?
    • A. 

      Settling

    • B. 

      Non-Settling

    • C. 

      Dewatering

    • D. 

      Fiberous

  • 2. 
    The best way to seal a non-settling slurry without product contamination is
    • A. 

      442 RSC/RSC SpiralTrac S with flush

    • B. 

      170 TC/TC Spiraltrac I with flush

    • C. 

      280 TC/TC/SSC/TC with Spiraltrac and plan 53 or 54

    • D. 

      1730 superset and a flush

  • 3. 
    When sealing a de-watering slurry the key to success is to
    • A. 

      Use a 10 ring set of mechanical packing with no flush

    • B. 

      Use a spiraltrac to prevent buildup of slurry around the seal up to 4%, otherwise use a flush or a dual seal

    • C. 

      Use a small cross section stuffing box

    • D. 

      Use a superset with no flush

  • 4. 
    The key features of the 170 slurry seal are
    • A. 

      Pusher plate, micropolished dynamic o-ring surface, line to line seal faces

    • B. 

      Double balance, cassette repair, interchangable gland

    • C. 

      Multiport flush, quench and drain, slotted gland

    • D. 

      Welded metal bellows, graphite secondary seals and antimony carbon

  • 5. 
    When rebuilding a mechanical seal we should always
    • A. 

      Randomly positioning the face, then hit it with a hammer

    • B. 

      Look for the black dot on the holder and align it with the indentation of the seal face

    • C. 

      Replace the set screws and springs with new components

    • D. 

      Align the dot on the wide face with a mark on the outside diameter of the gland.

  • 6. 
    A 442 Split seal must never be used in ATEX service in top entry mixers.
    • A. 

      True

    • B. 

      False

  • 7. 
    A T-30 Intelli-Flow is only used with piping plan
    • A. 

      53A

    • B. 

      53B

    • C. 

      53C

    • D. 

      54

  • 8. 
    When conducting failure analysis we must link the effect (damage) to the cause (operating conditions).
    • A. 

      True

    • B. 

      False

  • 9. 
    What information is necessary to conduct a failure analysis?
    • A. 

      Sealed Pressure, Shaft Speed and Temperature

    • B. 

      Piping Plan and Installation Process

    • C. 

      Fluid Characteristics

    • D. 

      Process Name

  • 10. 
    What is a Difference Between a Settling Slurry and a Non-Settling Slurry?
    • A. 

      Settles fast/not uniformly distributed vs. remain in suspension

    • B. 

      Larger particles typically >75-100µM vs. < 75µM

    • C. 

      “Free” water available vs. No Free water for Face Lubrication

    • D. 

      All of the above

  • 11. 
    A d50 of 100µm means what?
    • A. 

      The particle size in the slurry is more than 100µm.

    • B. 

      The largest particle in the slurry is 100µm

    • C. 

      Approximately 50% of the particles in the slurry are 100µm or less.

    • D. 

      Approximately 50% of the particles in the slurry are much larger than 100µm.

  • 12. 
    A d50 of 150µm means what?
    • A. 

      The particle size in the slurry is more than 100µm.

    • B. 

      The largest particle in the slurry is 100µm

    • C. 

      Approximately 50% of the particles in the slurry are 150µm or less.

    • D. 

      Approximately 50% of the particles in the slurry are much larger than 100µm.

  • 13. 
    The key to mechanical seal survival in heavy slurries is
    • A. 

      To install the seal in a stuffing box.

    • B. 

      To use an expeller with the seal.

    • C. 

      To use a gas seal

    • D. 

      To mount with maximum radial clearance or with a SpiralTrac.

  • 14. 
    What is the best seal Chesterton offers in Slurries up to 40% solids by volume?
    • A. 

      170 Seal

    • B. 

      442 Seal

    • C. 

      440 Seal

    • D. 

      880 Seal

  • 15. 
    Spiral Trac can clean a stuffing box shaft of Non-Settling Media without the use of flush water
    • A. 

      True

    • B. 

      False