BRX210

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BRX210 Mechanical Blueprint Reading

• Unit 6
• Holes

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After studying this unit, you will be able to

• Define the terms drilling, reaming,
  countersinking, counterboring, spotfacing, and
  boring
• Identify and list the location and size of
  drilled, reamed, countersunk, counterbored,
  spotfaced, and bored holes

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Answers to Valve Cap Quiz

1. 0.170 in.
2. 316 SST
3. 0.095 in.
4. 0.345 in.
5. 0.025 in.
6. 51
7. 0.005 in
8. 0.176 in.
9. 0.005 in.
10. 0.095 in
11. 0.032/0.028
12. ½ º
13. 0.038/0.042
14. Ø 0.095/0.093
15. 0.022/0.018
16. 5
17. 0.037/0.033
18. VC-000513
19. Critical Dimensions for Statistical Process
    Control

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Answers to Eccentric Collar Quiz

1. 1.178 in.
2. 0.688 in.
3. 2.548/2.538
4. 2.538 in.
5. 0.813/0.812
6. 0.239 in.
7. 1-1/4 in.
8. 1.105 in.
9. 2.548/2.538 length was 2.545/2.540
10. Reamed
11. 0.673 in.
12. 4 (see note)
13. 0.1595/0.1695
14. 0.344 in.
15. Full
16. 0.005 in.
17. 3 ga. Hot Rolled, Pickled and Oiled Sheet Steel
18. 0.001 in.
19. 0.390 in.

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Answers to Shoe Plate Quiz

1. 9-1/8 in.
2. 9.135 in.
3. 0.090 in.
4. 13/16 in.
5. 0.8225 in.
6. 44-66-0620
7. ½ in.
8. 4
9. 8.1875 in.
10. 2 in.
11. 7/16 in.
12. 2.09875 in.
13. 1.5495/1.5535
14. 0.634/0.638
15. 4 in.
16. 0.007/0.012
17. 0.01 in.
18. 12
19. 1.093 in.

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