5. Physical Prototyping

Finishing Techniques — Quiz

Test your understanding of finishing techniques with 5 practice questions.

Practice Questions

Question 1

A prototype with surface area of $2\,\mathrm{m}^2$ requires a dry powder coating thickness of $100\,\mu\mathrm{m}$. With coating density $1.2\,\mathrm{g/cm^3}$ and transfer efficiency of $80\%$, what mass of powder must be sprayed to achieve the target film?

Question 2

A coating sample develops blistering after 500 hours in an ASTM B117 salt spray test. What does this result primarily indicate about the coating's performance?

Question 3

A heat-sensitive thermoplastic prototype cannot withstand temperatures above $60\,^\circ\mathrm{C}$. Which finishing method is most appropriate to apply a protective film without thermal damage?

Question 4

Before painting steel prototypes, a phosphate pre-treatment is applied to improve adhesion. Which chemical process is this?

Question 5

Which accelerated weathering test cycles UV exposure and condensation to simulate outdoor coating degradation?