CBJ Skills and Expertise 3

Question 1

When channel-setting square princess-cut stones, what is the most critical measurement to verify before setting?

Accepted Answer

The stone width versus channel width tolerance

Answer

The stone width must match the channel width within a tight tolerance so stones sit level and the channel walls can be burnished over the girdles evenly.

Question 2

Which finishing technique is used to create a matte, non-reflective surface texture on metal?

Accepted Answer

Sand blasting or brushing with a brass wheel

Answer

Sand blasting or wire/brass brushing creates a uniform fine texture that scatters light, producing a matte surface finish.

Question 3

In platinum fabrication, why must tools and work surfaces be kept free of gold contamination?

Accepted Answer

Gold can diffuse into platinum at high temperatures, causing yellow discoloration

Answer

Gold can diffuse into platinum at soldering temperatures, causing permanent yellow discoloration that cannot be polished out.

Question 4

A bezel-set cabochon stone sits too low after setting. What should the jeweler have done differently during fabrication?

Accepted Answer

Made the bezel seat shallower so the stone sits higher

Answer

A shallower seat (the ledge inside the bezel) raises the stone's sitting height so more of the cab is visible above the bezel wall.

Question 5

What is the purpose of a scribe in bench jewelry work?

Accepted Answer

Scratching layout lines on metal for cutting or forming guides

Answer

A scribe scratches fine lines onto metal to mark cut lines, centerlines, or reference points before sawing or forming.

(CBJ) Certified Bench Jeweler Practice Test

(CBJ) Certified Bench Jeweler Practice Test

CBJ Skills and Expertise 3