CBJ Tools and Technology 2 — Questions and Answers
Question 1: Which type of flex shaft handpiece attachment is best suited for aggressive material removal when grinding metal?
- Carbide bur (Correct answer)
- Rubber wheel
- Felt bob
- Bristle brush
Correct answer: Carbide bur
Carbide burs are designed for aggressive cutting and material removal on metal surfaces.
Question 2: What is the primary purpose of a burnisher in jewelry bench work?
- Cutting metal to shape
- Smoothing and compressing metal surfaces to a high shine (Correct answer)
- Drilling pilot holes
- Removing excess solder
Correct answer: Smoothing and compressing metal surfaces to a high shine
A burnisher compresses and smooths metal by rubbing, raising a bright polish without removing material.
Question 3: A bezel roller is used primarily to:
- Roll out sheet metal to uniform thickness
- Push a bezel wall over a stone to set it (Correct answer)
- Score metal before bending
- Create decorative textures on metal
Correct answer: Push a bezel wall over a stone to set it
A bezel roller presses the top edge of a bezel wall down and inward over the girdle of a stone.
Question 4: Which soldering tool produces the hottest, most focused flame for platinum work?
- Air-acetylene torch
- Butane micro torch
- Hydrogen-oxygen torch (Correct answer)
- Propane-air torch
Correct answer: Hydrogen-oxygen torch
A hydrogen-oxygen torch produces extremely high temperatures and a clean, oxide-free flame ideal for platinum.
Question 5: In the context of bench jeweler tools, what does a graver primarily do?
- Polish metal to a mirror finish
- Cut or engrave lines and designs into metal (Correct answer)
- Measure stone dimensions
- Solder jump rings closed
Correct answer: Cut or engrave lines and designs into metal
A graver is a hardened steel hand tool used to cut, lift, or push metal in engraving and stone setting.
Question 6: What distinguishes a crossing file from a flat file in bench jeweler use?
- Crossing files have coarser teeth
- Crossing files have a double-convex lens-shaped cross section (Correct answer)
- Crossing files are used only on non-ferrous metals
- Crossing files remove more material per stroke
Correct answer: Crossing files have a double-convex lens-shaped cross section
A crossing file has a double-convex (lens-shaped) cross section, making it ideal for filing inside curves and ring shanks.
Question 7: Which abrasive grit sequence is correct when progressing from rough to fine finishing on a metal surface?
- 220 → 400 → 600 → 1200 (Correct answer)
- 1200 → 600 → 400 → 220
- 400 → 220 → 600 → 1200
- 600 → 1200 → 220 → 400
Correct answer: 220 → 400 → 600 → 1200
Abrasive grits are always worked from lower (coarser) to higher (finer) numbers to progressively refine the surface.
CBJ Tools and Technology 2
Which type of flex shaft handpiece attachment is best suited for aggressive material removal when grinding metal?