CPT Materials, Tools, & Safety in Prosthetics 3

Question 1

Which property of carbon fiber composites makes them preferred over aluminum for high-activity prosthetic feet?

Accepted Answer

Higher energy return and lower weight

Answer

Lower cost

Answer

Greater malleability

Answer

Resistance to UV degradation

Question 2

What does Shore hardness measure in the context of prosthetic materials?

Accepted Answer

Resistance to permanent indentation

Answer

Tensile strength

Answer

Flexural modulus

Answer

Thermal conductivity

Question 3

A technician is mixing two-part urethane foam. Which hazard requires IMMEDIATE attention if the mixture begins to expand faster than expected?

Accepted Answer

Inhalation of exothermic vapors

Answer

Skin contact with uncured resin

Answer

Electrical spark ignition

Answer

UV curing interference

Question 4

When drilling through carbon fiber laminate, which drill bit type is recommended to minimize delamination?

Accepted Answer

Diamond-coated bit

Answer

Standard twist bit

Answer

Brad-point bit

Answer

Spade bit

Question 5

Which material property is described as the ratio of stress to strain in the elastic region of a material?

Accepted Answer

Young's modulus

Answer

Ultimate tensile strength

Answer

Yield strength

Answer

Fracture toughness

Question 6

What is the correct disposal method for resin-contaminated gloves and mixing cups in a prosthetics lab?

Accepted Answer

Disposal as hazardous waste per local regulations

Answer

Standard municipal recycling

Answer

Incineration in the lab furnace

Answer

Rinsing with water and placing in general trash

Question 7

Which lamination layup sequence provides the greatest torsional rigidity for a transfemoral socket?

Accepted Answer

±45° carbon fiber outer with 90° inner

Answer

0°/0°/0° carbon fiber

Answer

Fiberglass inner with carbon fiber 0° outer

Answer

Random-weave carbon fiber throughout