CPT Materials, Tools, & Safety in Prosthetics 2

Question 1

Which solvent is most commonly used to clean carbon fiber components before bonding?

Accepted Answer

Acetone

Answer

Acetone effectively removes oils and contaminants from carbon fiber surfaces, promoting optimal adhesive bonding.

Question 2

When vacuum-forming thermoplastic sheets, which temperature range is typically used for polypropylene?

Accepted Answer

180–200°C

Answer

Polypropylene vacuum-forms optimally at 180–200°C, where it becomes pliable without degrading.

Question 3

A technician notices discoloration and brittleness in a silicone liner after extended use. What is the MOST likely cause?

Accepted Answer

UV light exposure

Answer

UV light degrades silicone polymer chains over time, causing discoloration and reduced elasticity.

Question 4

Which OSHA standard primarily governs respiratory protection in a prosthetics fabrication shop?

Accepted Answer

29 CFR 1910.134

Answer

OSHA 29 CFR 1910.134 establishes requirements for respiratory protection programs including fit testing and respirator selection.

Question 5

What is the primary advantage of using a belt sander over an angle grinder when shaping thermoplastic sockets?

Accepted Answer

Better control and reduced risk of material melting

Answer

Belt sanders generate less localized heat than angle grinders, reducing the risk of melting or warping thermoplastic materials.

(CPT) Certified Prosthetic Technician Practice Test