CBJ Finishing and Polishing 2

Question 1

What is the primary chemical composition of jeweler's rouge?

Accepted Answer

Ferric oxide (iron oxide)

Answer

Silicon dioxide (silica)

Answer

Aluminum oxide (alumina)

Answer

Chromium oxide

Question 2

What does tumble polishing involve?

Accepted Answer

Placing jewelry in a rotating barrel with abrasive media and burnishing shot

Answer

Rolling a piece by hand across a flat abrasive surface

Answer

Applying heat while rotating the piece on a lathe

Answer

Using ultrasonic vibration with chemical polishing solutions only

Question 3

Why should separate polishing wheels be used for different compounds?

Accepted Answer

To avoid cross-contaminating compounds, which reduces polishing effectiveness

Answer

To prevent the wheel motor from overheating

Answer

Because different compounds require different spindle speeds

Answer

To comply with bench safety color-coding standards

Question 4

What is 'bright cutting' in the context of jewelry finishing?

Accepted Answer

Using a graver to cut sharp, polished facets directly into the metal surface

Answer

Using a laser to engrave decorative designs into metal

Answer

Cutting gemstones to maximize their light refraction

Answer

Applying a bright-dip acid solution to strip oxides from the metal

Question 5

What is the purpose of 'pickling' a jewelry piece after soldering and before polishing?

Accepted Answer

To remove oxides, firescale, and flux residue from the surface

Answer

To add a textured surface pattern to the metal

Answer

To harden the metal before the polishing process begins

Answer

To apply a protective anti-tarnish coating

Question 6

What type of finish does a scratch brush used with soapy water produce on silver?

Accepted Answer

A satin or matte finish

Answer

A bright mirror finish

Answer

A hammered texture

Answer

An oxidized antique finish

Question 7

What is the primary risk when polishing a jewelry piece near a prong-set gemstone?

Accepted Answer

Friction and pressure from the polishing wheel may loosen or crack the stone

Answer

The polishing compound may permanently discolor the gemstone

Answer

The metal will become too thin under the stone's girdle

Answer

The stone's refractive index will be altered by heat