What is a distinguishing characteristic between sintered and electroplated wheels?

• A) Sintered wheels are only available in 60 and 80 grit.
• B) Sintered wheels tend to be more economical.
• C) Electroplated wheels do not exist.
• D) Electroplated wheels generally have a shorter lifespan.

Where do lapidary wheels typically wear out most often?

• A) On the edges
• B) In the center
• C) On the right side
• D) On the left side

Which lapidary wheel(s) are unnecessary and can be skipped in this abrasive grit series?

Steel Back: 80, 120, 220, 
Sponge Back: 280, 600, 800, 1200, 3000.

• A) 120grit
• B) 280grit
• C) 800grit
• D) 120 and 220grit

Why are saw blades made thinner and thinner?

• A) To minimize material loss
• B) To reduce the cost of saw blades
• C) Specifically for cutting agates and jaspers
• D) To enhance their accuracy and stability during operation

How deep should a saw blade be submerged?

• A) ¼ inch of lubricant
• B) 2 inches of lubricant
• C) 2 inches below the slab tabletop
• D) 5 inches below the slab tabletop

What is true about removable splash hoods on lapidary machines?

• A) They are optional accessories.
• B) They require alignment checks before machine operation.
• C) They can be interchanged between machines.
• D) They make great beverage stands.

When does polishing contamination occur in lapidary work?

• A) When different varieties of stone are cut simultaneously
• B) When dirt from rough rock contaminates the grinding wheels
• C) When grit particles spread throughout finer wheels
• D) When stone dye isn't properly cured before polishing

Which one of these stones is not known to be poisonous?

• A) Bumble Bee Jasper
• B) Galena
• C) Cinnabar
• D) Graveyard Point Plume

When using water to lubricate and minimize dust during lapidary work, is it better to have:

• A) More water running down
• B) Less water running down

What is the Mohs scale?

• A) A density scale
• B) A fracture scale
• C) A hardness scale
• D) A luster and brilliance scale

What is a “pit” in lapidary work?

• A) A druzy spot left on a cabochon
• B) A botryoidal area left on a cabochon
• C) A type of undercut on soft material
• D) An agatized area that takes the longest to polish

What can happen with sediment remnants from grinding and sanding?

• A)Make for flavorful ingredients
• B) Cause clogging of drains
• C) Lead to rusting of machinery
• D) Affect the quality of cuts for subsequent machine users

Which mineral typically exhibits a brighter luster once polished?

• A) Agate
• B) Topaz
• C) Halite
• D) Labradorite

Which one of these substances is detrimental to diamond grinding wheels?

• A) Copper
• B) Talc
• C) Diamond
• D) Petrified wood

For what purpose do we utilize the surface tension of water?

• A) Checking the trueness of our wheels
• B) Refracting light
• C) Clearing material while grinding
• D) Showing us scratches

What does it mean to true a machine part?

• A) Add more diamond with epoxy
• B) Balance it
• C) Reshape it
• D) Use it with its original manufactured parts

What is a loupe?

• A) One full rotation of a wheel
• B) A glass spectacle
• C) A full rotation of the drive belt
• D) The sidewall around a cabochon

Why are diamond wheels rotated during machine maintenance?

• A) Because diamonds wear out
• B) It helps balance the wheels
• C) Keeps the wheels from seizing
• D) It prevents rusting from water exposure

What is a bushing in lapidary equipment?

• A) The sidewall of a machine housing
• B) The spacers used between each grinding wheel
• C) The space filler used between a saw blade and an arbor
• D) A dop wax holder

What is dopping wax?

• A) Essential for every cabochon
• B) Always green
• C) Only usable on wood sticks
• D) Ruined if it gets too hot

Cerium oxide and titanium oxide _______.

A) Are interchangeable

B) Are the only two polishing compounds usable on the same buffing wheel

C) Are both confused because they are the same color

D) Have different effects on different kinds of stone

What material are tracing sticks commonly made of for use with templates?

• A) Lead
• B) Aluminum
• C) Tin
• D) Stainless steel

What do sparks from a trim saw typically indicate?

• A) There is not enough water
• B) Abrasion is occurring
• C) The diamonds are dull
• D) You are pressing at the wrong angle

Flat lap plates ________.

• A) Must be stored with care to prevent interchanging particles.
• B) Can never be used in the center.
• C) Cannot grind a dome.
• D) Must run in a vertical position.

Which order is correct for the lapidary process series?

• A) Mass stock removal, grinding, smoothing, sanding, pre-polishing, polishing
• B) Grinding, sanding, pre-polishing, polishing, smoothing
• C) Grinding, sanding, doming, pre-polishing, polishing
• D) Mass stock removal, sanding, doming, polishing

The process of gem cutting is primarily done through:

• A) Cutting
• B) Ripping
• C) Shearing
• D) Abrasion

A type of light phenomenon in stone is:

• A) Stochromism
• B) Playoscematic
• C) Iridescence
• D) Incandescence

Sharp stone edges _______.

• A) Should be sawn first
• B) Dull grinding wheels way faster
• C) Ruin cloth-backed wheels
• D) Have no bearing on any wheels

Why is a cabochon domed?

• A) It reflects light back perfectly toward the observer's eye.
• B) There is no necessity; it is designed for use with opaque materials.
• C) The dome reflects light on the surface in a straight line, preventing specular reflection.
• D) The dome is simply easier to polish.