CBJ Skills and Expertise 5

Question 1

When drilling a hole in a gemstone for a bead-drilled pendant, which drill type is most appropriate?

Accepted Answer

A diamond-coated drill bit used with water lubrication at low speed

Answer

A high-speed steel twist drill at maximum RPM

Answer

A carbide burr used dry at high speed

Answer

A flex shaft cutting disc scored across the surface

Question 2

What does the term 'sweat soldering' describe in bench fabrication?

Accepted Answer

Pre-applying solder to one surface, then reheating to fuse two parts together without adding more solder

Answer

Soldering performed while the piece is very hot from prior heating

Answer

Using high-temperature solder at maximum torch output

Answer

Applying flux heavily to prevent oxidation during long soldering sessions

Question 3

When engraving a bright-cut design on a ring shank, which graver shape produces the characteristic reflective V-groove?

Accepted Answer

A V-point (onglette) graver

Answer

A flat graver

Answer

A round graver

Answer

A square graver

Question 4

A jeweler needs to anneal a work-hardened piece of sterling silver. What is the correct procedure?

Accepted Answer

Heat to a dull red glow, then quench in pickle or water to soften

Answer

Heat until glowing bright orange, then quench in cold water immediately

Answer

Apply heat briefly with a butane lighter and air cool

Answer

Hammer the piece repeatedly on an anvil to restore softness

Question 5

What is the primary role of investment compound in the lost-wax casting process?

Accepted Answer

Creating a mold by encasing the wax model and withstanding casting temperatures

Answer

Acting as a flux to clean molten metal before pouring

Answer

Polishing the finished casting to a bright shine

Answer

Bonding separate cast components after casting

Question 6

Which measurement tool does a bench jeweler use to verify the inside diameter of a ring accurately?

Accepted Answer

A digital caliper or ring gauge set to measure internal diameter

Answer

A gauge plate (ring sizing stick)

Answer

A micrometer on the outside of the shank

Answer

A millimeter ruler placed across the top of the ring

Question 7

In stone-setting, what is the purpose of undercutting the seat beneath a prong?

Accepted Answer

Creating a ledge that grips the girdle of the stone and keeps it from sinking

Answer

Removing excess metal to reduce the ring's total weight

Answer

Increasing the prong height so more metal can be pushed over the stone

Answer

Allowing easier removal of the stone for future repairs