Edition By Steve Krar
1. What is an adjustable Square? - ANSWER:general purpose work
2. What is a Percision Square? - ANSWER:chiefly for inspection and setup purposes
3. What are the two materials that surface plates are made of? - ANSWER:granite or
cast iron
4. What are four advantages of granite surface plates? - ANSWER:1. Does not get
burred
2. Does not rust
3. Not affected by temperature change
4. Non magnetic
5. How many threads per inch are on the spindle of a micrometer? - ANSWER:40
threads per inch
6. To what accuracy can a machinist read a 6" steel rule? - ANSWER:Depends on the
resolution of the scale, but can be as close as 0.01"
7. What are the main part of a micrometer? - ANSWER:frame, anvil, spindle, thimble
8. What does each graduation on the sleeve of a micrometer represent? -
ANSWER:Each line on the sleeve indicates 0.025
9. What is the resolution limit of a standard micrometer? - ANSWER:40 equals
divisions, each of which equals 1/40 (.025) inch
10. What is the resolution limit of a vernier micrometer? - ANSWER:10 divisions the
same as (.009) on the thimble
11. What does each graduation on the thimble of a micrometer represent? -
ANSWER:.001, or .0010 inches
12. What is the range of measurement of a four inch outside micrometer? -
ANSWER:1 inch
13. What is dykem used for layout work? - ANSWER:to make layout lines visible
14. How many parts are there to a combination set and what are their uses? -
ANSWER:1. STEEL RULE- for various layout, setup, and checking operations
2. SQUARE HEAD- to layout lines parallel to an edge; layout and check 45* and 90*
angles