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Self-Assessment Examination

JPO Self-Assessment Examination

JPO Journal of Prosthetics and Orthotics: January 2005 - Volume 17 - Issue 1 - p 33-34
  • Free


  1. Read the article on pages 27–32.
  2. Complete the examination.
  3. Submit your completed examination to the AAOP per the directions on the next page.


The following questions require short answers only; you do not have to use complete sentences. All questions refer the article: “Material Properties of Selected Prosthetic Laminates,” by Sam L. Phillips, CP, and William Craelius, PhD.


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  1. Which of the following is NOT a performance criterion for Prosthetic sockets and orthotic devices:
    1. durability
    2. minimal fabrication cost
    3. minimal weight
    4. strength sufficient to withstand maximum expected stresses
    5. all of the above are performance criteria.
  2. [Fill in the blanks with the correct terms.] FRP stands for ____,____,____ which is a type of composite.
  3. [Select the correct term.] STRESS / STRAIN The amount of force applied over a given area is called ____ and the amount of deformation for a given length is called ____.
  4. [Fill in the blank with the correct term.] Young's Modulus, which is the amount of force to obtain a certain amount of deformation, is synonymous with ____.
  5. True or False? Ultimate Tensile Strength (UTS) is the maximum force applied before a fiber breaks.
  6. [Select the correct response.] The maximum force applied before permanent deformation occurs is called:
    1. Bending Stiffness
    2. Yield Strength
    3. Stress and Strain
  7. True or False? Brittle materials break with high deformation while ductile materials break after small deformation.
  8. Rate the following fiber types according to strength:
    • Nylon, Cotton, Spectralon, etc.
    • Carbon
    • Fiberglass
  9. Strength Range:
  10. Low =____
    Middle =____
    High =____
  11. [Select the correct term]. Both carbon and fiberglass proved to be very strong, but they do have limitations as prosthetic socket materials due to their ____. They break rather than stretch during post fabrication modifications.
  12. True or False? Testing resulted in no significant differences among different resins for thickness and weight.
  13. [Fill in the blank with the correct term: STRUCTURAL / FILLER
  14. The ____ materials are nylon, cotton, perlon, Spectralon, and nyglass, while the ____ materials are fiberglass and carbon.
  15. True or False? Results from the bending tests demonstrated a clear trend of increasing stiffness as the distance between carbon fibers increased.
  16. [Select the correct answer.] The ____ seemed to be easier to use because of fewer problems with air bubbles and better saturation.
  17. [Circle the correct answer.] Bending tests show strength INCREASED / DECREASED as the carbon fibers (are) separated.

Complete the JPO Self-Assessment Examination on the previous page and score a minimum of 75 percent to earn two PCE credits. Send the completed examination and payment in U.S. currency ($20/AAOP members, $40/nonmembers) to: AAOP, Dept. 937, Alexandria, VA 22334-0937. The examination must be received by the AAOP within 3 years of the publication date for credit to be awarded.

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© 2005 American Academy of Orthotists & Prosthetists