Chapter 5: Knowledge Check

Check Your Knowledge: Chapter 5

Quiz yourself using the following chapter review questions to check how well you can recall the material.

Review Questions

1. When is benchwork a better option than CNC preparation when manufacturing a part?
   1. When performing complex part shapes
   2. With semi-precise tolerance
   3. When the tolerance is small
   4. Only making one part
2. Which process is used to harden hacksaw blade teeth?
   1. The pitch of the blade
   2. Heat-treated and tempered
   3. They are made from carbide
   4. Spacing them at 18 TPI
3. Which blade would you select to cut thick material?
   1. A long blade
   2. Large pitch blade
   3. A short blade
   4. Small pitch blade
4. True or false: To determine the pitch of a saw blade, divide one inch by the TPI number on the side of the blade.
5. Use the correct term to complete the sentence. Layout dye, also called layout fluid, removes __________ from a work surface by providing a uniform, deep color that contrasts with scribe lines.
6. Select all characteristics that make a Sharpie marker a suitable alternative to using layout dye.
   1. They come with their own applicator
   2. They are not flammable
   3. Markers do not spill
   4. They cover better than layout dye
7. What material are machinist rulers made from?
   1. Digital
   2. Wood
   3. Steel
   4. Plastic
8. True or false: The straight edge of the stock can be used to create a layout line.
9. True or false: The use of complicated tools is necessary to create arcs in layout.
10. Select from the list the characteristics of a machinist’s scribe.
    1. Replaceable tips
    2. Are bulky so they do not roll around
    3. Dull point for safety
    4. Made from hard material
11. Use the correct term to complete the sentence. Point-style punches are __________ tools with conical ends designed to be struck with a hammer, leaving a dimple on the stock material.
12. True or false: All files perform the same operation, and there is no need to have more than one.
13. True or false:  Creating threads requires complex operations best left to CNC machine operations.
14. True or false : Clamps are often used to secure material during machining operations.

Answer Key

1. With semi-precise tolerance – Correct, hand work may be quicker than CNC preparations which are required for precise production work
2. Heat-treated and tempered – Correct, heat treating hardens the material and tempering controls the toughness of the teeth.
3. Correct, a large pitch blade has a large gullet compared to a small pitch blade to accommodate the chip during the cut
4. True – Correct. Dividing the entire inch by the number of teeth in that inch will equal the distance between each tooth.
5. Glare – Correct. Removing glare is important to allow easy viewing of your work.
6. They come with their own applicator – Correct, they come with a felt tip and a cap to prevent them from drying out; They are not flammable – Correct, layout dye has solvents which are usually flammable until they dry; Markers do not spill – Correct, spilling layout dye requires prompt action to prevent staining unwanted surfaces.
7. Steel – Correct. Steel rulers are rigid or flexible depending on thickness.
8. True: Odd leg calipers, slide calipers, and squares all use the edge of the stock to create straight lines.
9. False – Tools for creating arcs can be complex but any object which represents the arc needed can be used for layout.
10. Replaceable tips – Correct. Some scribes have replaceable carbide tips; Made from hard material – Correct. Most scribes are made from tool steel or carbide tipped.
11. form – Correct, forming displaces material in contrast to making a chip and removing material.
12. False – Correct. Files come in several options from their shape to the coarseness of the cut. Multiple files are necessary to perform benchwork.
13. False – Correct, making threads by hand using taps and dies are simple and require no complex setups.
14. True – Clamps come in many designs, many which lend themselves to securing material during machining operations.