CBJ Quality Assurance and Improvement 3

Question 1

In quality control, what does 'tolerance' refer to in the context of stone setting?

Accepted Answer

The allowable range of variation in a measurement or fit

Answer

Tolerance defines the acceptable range of deviation from a target measurement, such as the allowable looseness in a bezel fit.

Question 2

What does a 'figure-8' motion during hand polishing accomplish that a straight stroke does not?

Accepted Answer

It prevents directional scratching and produces a more even finish

Answer

A figure-8 polishing motion continuously changes the direction of abrasion, preventing parallel scratch lines and creating a uniform surface.

Question 3

Why should a finished piece be inspected under both direct and raking light?

Accepted Answer

Raking light highlights surface scratches and texture flaws invisible under direct light

Answer

Raking (oblique) light casts shadows across surface irregularities, making scratches, dents, and tool marks visible that direct illumination would flatten out.

Question 4

Which of the following best describes the quality standard for a channel-set row of stones?

Accepted Answer

All stones should sit at a uniform height with consistent spacing

Answer

A properly finished channel setting requires all stones to sit at equal height and with even spacing for both structural integrity and aesthetic quality.

Question 5

What is the correct procedure if a prong tip cracks during the burnishing process?

Accepted Answer

Apply flux and re-solder the tip, then re-burnish gently

Answer

A cracked prong tip must be repaired by removing the stone if needed, re-soldering or adding metal, and then carefully re-burnishing to avoid recurrence.

(CBJ) Certified Bench Jeweler Practice Test

(CBJ) Certified Bench Jeweler Practice Test

CBJ Quality Assurance and Improvement 3