CBJ Core Knowledge and Fundamentals 2

Question 1

What is the primary purpose of annealing a metal during bench jewelry work?

Accepted Answer

To restore ductility after work-hardening

Answer

Annealing relieves internal stress and restores ductility to work-hardened metal by heating it to a specific temperature and allowing controlled cooling.

Question 2

Which of the following alloys is classified as a sterling silver?

Accepted Answer

92.5% silver and 7.5% copper

Answer

Sterling silver is a legally defined alloy consisting of 92.5% pure silver and 7.5% other metals, typically copper.

Question 3

When using a flexible shaft machine, which handpiece is best suited for wax carving?

Accepted Answer

Low-speed handpiece with a round bur

Answer

A low-speed handpiece with appropriate burs prevents wax from melting due to friction heat and offers better control during carving.

Question 4

What does the term 'work hardening' describe in metalsmithing?

Accepted Answer

Metal becoming stiffer and more brittle from mechanical deformation

Answer

Work hardening occurs when repeated mechanical stress (bending, hammering) dislocates the metal's crystal structure, making it harder and more brittle.

Question 5

A jeweler needs to solder a jump ring closed on a finished gold necklace. Which solder should be chosen to avoid visible seams?

Accepted Answer

Hard solder with the same karat as the piece

Answer

Using solder that matches the karat of the piece ensures the seam blends in color and value, making it nearly invisible after finishing.

(CBJ) Certified Bench Jeweler Practice Test

(CBJ) Certified Bench Jeweler Practice Test

CBJ Core Knowledge and Fundamentals 2