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Personal safety practices

Personal safety practices. Remove jewelry, watches and rings Tie hair back and avoid loose clothing Do not play games in the shop Be aware of other workers unsafe habits. List personal safety practices when working in the shop. Wear safety glasses at all times when in the shop area

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Personal safety practices

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  1. Personal safety practices • Remove jewelry, watches and rings • Tie hair back and avoid loose clothing • Do not play games in the shop • Be aware of other workers unsafe habits

  2. List personal safety practices when working in the shop • Wear safety glasses at all times when in the shop area • Ask when not sure of any procedure • Wear non slip oil resistant soled leather shoes

  3. Personal safety practices • Do not wear contact lenses • Do not hesitate to remove yourself from any unsafe environment • Understand the health risks of any chemicals that you are using

  4. Personal safety practices • Do not work when intoxicated or taking medications that reduce your alertness • Do not work when you are over stressed or tired • Do not attempt to lift any heavy object without the proper tools or assistance

  5. Personal safety practices • Do not work alone • Insure an instructor is present in the lab while you are working on any project.

  6. Basic Electrical Theory

  7. Define Electricity • The ability to perform “work” by moving electrons between atoms

  8. Electron Movement • Heat, light or magnetism is created when electrons move from atom to atom

  9. Alternator provides power for running vehicle

  10. Alternator provides power for running vehicle

  11. Where do electrons come from? • Atoms!

  12. What is an atom?

  13. an Atom consists of: Electrons Protons and Neutrons

  14. Protons and neutrons make up the nucleus

  15. Like charges repel each other but the neutrons “glue” the protons in the nucleus

  16. Electrons are repelled from each other, but attracted to the protons. Energy (in the form of centrifugal force) keeps the electrons moving in their orbital shell.

  17. What is a Volt?

  18. Voltage • Electromotive Force (EMF) • the electrical pressure that forces electrons to move from atom to atom • Voltage is present when there is a difference in electrical pressure

  19. For Electrons to move between atoms

  20. There must be a force to make them leave

  21. or a “difference” in electrical pressure

  22. These are “balanced” atoms

  23. The electrons have no reason to leave the atom

  24. An unbalanced atom is an “ion” This ion has a negative charge

  25. This ion has a positive charge

  26. Opposite

  27. Opposite Charges

  28. Opposite Charges Attract

  29. Similar

  30. Similar charges

  31. Similar charges repel

  32. For current to flow there must be a positive • AND • a negative potential

  33. Negative ion Positive ion To have voltage you must have a difference in electrical pressure

  34. The electromotive force between ions is calledVOLTAGE

  35. Know your Voltmeter • http://us.fluke.com/VirtualDemos/80_series_V_demo.swf

  36. Lab #3 Using the Voltmeter

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