Unit 4.2 Maintenance Materials and Measuring Tools

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Unit 4.2 Maintenance Materials and Measuring Tools
2013-12-05 12:31:40
Maintenance Materials

021: Torque Wrenches 022: Digital Multimeters 023: Other Common Measuring Tools
Show Answers:

  1. What do torque wrenches measure?
    Force in pull (pounds) when tightening nuts, bolts, and clamps
  2. How do indicating-type torque wrenches display the applied torque?
    By a pointer on an indicating scale
  3. What type of torque wrench automatically releases when you apply a predetermined amount of torque?
    Breakaway type
  4. How much free travel does the breakaway torque wrench allow when the preset torque level is reached?
    5-10 degrees
  5. What may happen if you over-tighten a component greater than the value set on a torque wrench?
    Damage internal part of the wrench and failure of the part
  6. What is the working range of a breakaway or indicating-type torque wrench?
    Not lower than 20% and not higher than the rated capacity of the torque wrench
  7. When torquing a bolt, to what should you set the torque value?
    The upper limit of the torque value
  8. When you're using a torque wrench to tighten a series of nuts, do you tighten each nut to the specified torque before starting to torque the other nuts?
    Gradually tighten each nut until they all reach the torque value
  9. Before storing a torque wrench, to what setting should you set the grip?
    Set to the lowest setting to relieve pressure on the spring handle
  10. Torque wrenches should have some kind of label (paper, tape, etc) on the handle. What information do you determine from this label before using the torque wrench?
    Calibration date
  11. What do you do if you discover that a torque wrench is overdue calibration?
    Turn it in for calibration
  12. What are the two stresses a fastener takes when tightened?
    Torsion and tension
  13. Why is breakaway torque measured?
    To ensure product integrity
  14. What is prevailing torque usually associated with?
    Self locking screws and nuts
  15. What is a multimeter?
    Ammeter, voltmeter, and ohmmeter in one device
  16. What is the major advantage of the Fluke multimeter?
    When taking measurements in difficult or hazardous situations you can keep your eyes on the probes and read the display later
  17. How many input receptacles does the Fluke meter have?
  18. What are the different Fluke meter modes of operation?
    • RANGE button
    • (REL) button
    • MIN/MAX button
    • HOLD-RESET MIN/MAX button
  19. When does the Fluke meter perform a self-test?
    When you turn on the meter
  20. Which measuring technique should you use for troubleshooting for a loose wire?
  21. What should be done if the digital meter goes from OL to 0 when preforming a continuity check?
    Normal indication, continue use
  22. What is a feeler gauge?
    Tool used to measure the gap between two parts
  23. What is incorporated into the feeler gauge case?
    Locking screw
  24. What are three commonly used micrometers?
    • Outside
    • Inside
    • Depth
  25. What determines a micrometer's range?
    The longest movement possible between the spindle and the anvil
  26. What do outside calipers measure?
    Outside diameters
  27. How are simple calipers adjusted?
    Pulling or pushing the legs to open or close them
  28. What are transfer calipers used for?
    Measuring chamfered grooves or flanges
  29. How are slide calipers graduated?
    Inches, fractions, or millimeters
  30. What is used on depth gauges as the reference surface or master standard from which measurements are taken?
    The supporting block
  31. What must be done to the depth gauge before any measurements are taken?
    Zero the gauge before measuring