CHAPTER 2 Tools and Measuring Instruments

Learning Objectives After studying this chapter, you will be able to: • Identify common hand tools. • Use common hand tools properly. • Identify common engine service tools. • Identify power tools commonly used for small engine and outdoor power equipment service. • Differentiate between common precision measuring instruments. • Select and use the appropriate precision measuring instruments to accurately and precisely measure various engine components.

Instructional Materials Text Review Questions Suggested Activities Workbook Review Questions Job 2, Hand Tool Identifi cation and Use Job 5, Measuring Instruments Instructor’s Manual Reproducible Masters: RM 2-1: Reading a Standard US Customary Micrometer RM 2-2: Reading a Vernier Micrometer RM 2-3: Reading a Metric Micrometer RM 2-4: Handling a Micrometer Lesson Slides: LS 2-1: Parts of an Outside Micrometer LS 2-2: Parts of a Dial Caliper Chapter Quiz

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Ch02.indd 35 10/18/2011 10:27:02 AM Reproducible Masters RM 2-1: Reading a Standard US Customary Micrometer. This reproducible master shows the parts of a standard micrometer scale, the steps in reading a standard micrometer, and related exercises for the students to complete. Use this reproducible master to reinforce your students’ understanding of how to read a standard US customary micrometer. RM 2-2: Reading a Vernier Micrometer. This reproducible master shows an example of reading a Vernier micrometer, and provides related exercises for the students. Use this reproducible master to reinforce your students’ understanding of how to read a Vernier micrometer. RM 2-3: Reading a Metric Micrometer. This reproducible master shows the scale divisions of a metric micrometer. Use this reproducible master to reinforce classroom discussion of reading a metric micrometer. RM 2-4: Handling a Micrometer. This reproducible master shows the proper ways to handle inside and outside micrometers to ensure accurate readings. Use this reproducible master to reinforce classroom instruction in the use of inside and outside micrometers.

Lesson Slides LS 2-1: Parts of an Outside Micrometer. This slide identifi es the various parts of an outside micrometer. The parts identifi ed are applicable to all types of outside micrometers. LS 2-2: Parts of a Dial Caliper. This slide identifi es the various parts of a dial caliper. This slide can be used to familiarize student with dial calipers, and also as a visual aid for explaining how to take different types of measurements with a caliper.

Answers to Textbook Review Questions 1. A combination box/open-end wrench. 2. An adjustable wrench. 3. A socket wrench and a spark plug socket. 4. True 5. Rings can fl y from pliers with great velocity, causing eye injury. 6. center punch 7. fl ared (mushroomed) 8. A ring compressor compresses the piston rings so the piston can be installed in the cylinder. 9. Cylinder hones 10. Any two of the following: tachometers, spark testers, compression tester. 11. False 12. Any three of the following: micrometers, Vernier calipers, telescoping gauges, small hole gauges, micrometer depth gauges, dial indicators, feeler gauges, combination square 13. B. .001″ 14. D. .025″ 15. C. .0001″ 16. A. inside diameters 17. micrometer 18. A small hole gauge. 19. movement, surface irregularities, run-out 20. screw pitch gauge

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Ch02.indd 36 10/18/2011 10:27:04 AM Chapter 2 Tools and Measuring Instruments Answers to the Workbook Questions 1. A. Open-end wrench B. Box-end wrench C. Combination box/open-end wrench D. Tubing wrench 2. pull 3. A. Vise-grip, clamping and gripping B. Needle-nose, bending and gripping C. Diagonal side-cutting, cutting electrical wire D. Combination slip-joint, general purpose 4. Phillips 5. D. All of the above. 6. B. 60°, 90° 7. pin punch 8. True 9. B. has a relatively aggressive cut 10. A. curved 11. probe, pickup 12. A. Jaws B. Anvil C. Base D. Handle 13. strap w rench 14. ridge r eamer 15. C. the rings may become distorted if they are installed by hand 16. D. None of the above. 17. Fa l s e 18. Tachometers 19. grounded 20. B. maximum air pressure created in the cylinder 21. If the workpiece is not secured, the drill bit may bind, causing the workpiece to spin and infl ict serious injury. 22. False 23. fusible l ink 24. A. Anvil B. Spindle C. Lock nut D. Sleeve E. Thimble F. Ratchet stop G. Frame 25. inside 26. blade 27. 1/40 ( .025) 28. 1/1000 (.001) 29. A. .259″ B. .342″ C. .187″ 30. A. .4325″ B. .2183″ C. .0868″

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Ch02.indd 37 10/18/2011 10:27:04 AM 31. outside 32. small h ole 33. thickness, or feeler 34. True 35. screw p itch

Answers to Chapter Quiz 1. D. All of the above. 2. A. electrical wires 3. D. None of the above. 4. D. All of the above. 5. D. All of the above. 6. B. Keep the metal in fi rm contact with the tool rest at all times. 7. B. is used to measure the diameter of a bore 8. False 9. False 10. True 11. False 12. drift 13. rat t ail 14. bearing s plitter 15. wire

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