ATASA 5th Study Guide Chapter 4 Pages 59-98 Name
Shop Tools, Measurement, Fasteners 52 Points Due Date: 9-13-12
1. The U.S. customary (standard) system of measurement uses the as its basic unit of
linear measurement, while the Systems International or metric system uses the .
2. Threads can be either cut or into fasteners. Rolled threads are 30% stronger than cut.
3. The 4 classifications for U.S. Standard threads are , , , & .
4. Bolts are identified by defining the size & type, shank , ,
overall length, and the grade or tensile strength.
5. Thread is determined by the # of threads per inch (std) or distance in
when using threaded fasteners that are metric. Use a screw pitch gauge to make this thread measurement.
6. The amount of stress or stretch is expressed with marks (std) or with a property class
number when using fasteners that are metric. More radial lines or higher # means higher tensile strength.
7. An or stretched bolt will have thread distortion & insufficient clamping force.
8. The most common type of bolt failures are breaks caused from under-tightening.
9. Flat are used to spread out loads, lock bolts in place, & even seal against fluid loss.
10. The most commonly used thread lubricant is compound.
11. Thread & thread are also popular chemicals used with fasteners.
12. A thread gauge is used to determine thread pitch. (the coarseness of a thread)
13. A is used to cut or chase internal threads. A will cut or chase external threads.
14. Thread can repair severely damaged threads in a bore back to original size & strength.
15. Precision measuring tools are accurate to the nearest ” (std.) or the mm (metric).
16. Dial can make inside, outside, and depth measurements in either standard or
metric increments. There is also an electronic, digital version of the caliper available.
17. are more accurate than calipers. They can be outside, inside, or depth by design.
They typically only measure up to an inch or 25 mm at a time & are described by their largest size.
18. gauges (snap) and gauges (ball) measure inside
diameters but have no graduation marks. They must be transferred to a micrometer or a caliper.
19. gauges can be flat or round wire in design, metric or std., & plastic, brass or steel.
20. A precision is a flat bar used in conjunction with flat feeler gauges to find warp.
21. Dial are used to measure movement, like end play, runout, and backlash.
22. The word wrench means . They can be open-end, box-end, combination, flare nut,
allen, torx, tamper-torx, or adjustable. Adjustable (crescent) wrenches are likely to slip the most.
23. A huge variety of sockets can be attached to handles to speed up work.
24. wrenches measure how tight a nut or a bolt is. They may be either
beam, digital readout, click-type (ratcheting & micrometer-adjust) or dial in design.
25. come in a huge variety of sizes & tips to match fastener differences.
26. are gripping tools that are also available in a huge variety for specific purposes.
27. Hammers, , and all have specific designs based on use.
28. Screw extractors are often called “”.
29. Teeth on a hacksaw blade face from the handle, so the saw cuts on the forward stroke.
30. Some gears & bearings are on to shafts, making pullers necessary removal tools.
31. Drivers are used for installing some , , and .
32. Light Emitting Diode (LED) are very popular in service & repair.
33. The torch can be used to heat, cut, weld, or braze.
34. Impact wrenches should only be used with impact sockets. True False
35. An OSHA-approved air blow gun has holes on the side for safety.
36. Vehicles lifted with a floor jack should then be supported with stands.
37. Access to service data is critical to proper repairs. The (Vehicle Identification Number)
must be known before looking up data in books, on-line, on a CD-DVD, or calling a hotline for assistance.
38. The (iATN) is an on-line group of
thousands of auto technicians from around the world exchanging technical knowledge and information.