Practice Test Geeks(CPT) Certified Prosthetic Technician Practice Test
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Materials, Tools, & Safety in Prosthetics Flashcards

7 cards from real CPT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Materials, Tools, & Safety in Prosthetics flashcards as text

  1. Which thermoset resin system is most often used for definitive prosthetic socket lamination due to its low shrinkage and high strength?

    Answer: Epoxy resin

    Epoxy resin offers low cure shrinkage, excellent mechanical properties, and strong adhesion to reinforcing fibers, making it the preferred choice for definitive sockets.

  2. What does the term 'fiber volume fraction' describe in a composite laminate?

    Answer: The proportion of the composite cross-section occupied by reinforcing fibers

    Fiber volume fraction is the ratio of fiber cross-sectional area to total composite cross-sectional area and directly influences mechanical performance.

  3. When storing isocyanate-based materials (polyurethane components) in a prosthetics lab, which condition is MOST critical to maintain?

    Answer: Low humidity and sealed containers

    Isocyanates react vigorously with moisture; storage in sealed containers at low humidity prevents premature reaction and degradation of the material.

  4. A technician must grind titanium components. Compared to grinding steel, titanium grinding requires:

    Answer: Lower wheel speed, sharp abrasives, and cooling fluid

    Titanium's low thermal conductivity causes heat buildup; lower wheel speed, sharp abrasives, and coolant prevent work hardening and fire risk from titanium sparks.

  5. Which test method is used to evaluate the peel strength of an adhesive bond between two prosthetic components?

    Answer: T-peel test (ASTM D1876)

    The T-peel test measures the force required to peel apart two bonded flexible substrates, directly quantifying adhesive peel strength.

  6. What is the correct sequence when donning a half-face respirator before working with resins?

    Answer: Don gloves → don respirator → perform seal check → enter work area

    Gloves should be donned first to keep the respirator sealing surfaces clean, then the respirator, and a positive/negative pressure seal check must be performed before entering the hazardous area.

  7. A prosthetic technician uses a torque wrench when assembling ankle-foot components primarily to:

    Answer: Ensure fasteners are tightened to manufacturer-specified torque values

    Torque wrenches ensure fasteners reach the exact clamping force specified by the manufacturer, preventing both under-tightening (loosening in use) and over-tightening (component damage).