Which Group Includes the Most Common Types of Threaded Fasteners? A

62 20 Mechanical Systems DUE Mon, 11/21/16 – Start of class

HW 8: Fasteners / Force, Pressure, Density Check link on website for helpful fastener information

Please use a scantron. Material is based primarily on class discussions, but use any resources you like.1 point each

1. Which group includes the most common types of threaded fasteners? a. Retaining rings, washers, and screws c. Pins, bolts, and retaining rings b. Washers, locking nuts, and rivets d. Bolts, nuts, and screws

2. Which statement is true about screw-type fasteners? Screws: a. Are able to create threads in softer materials when assembled b. Are always assembled with a nut on the blunt end c. Are always offered with six-sided heads for maximum torque d. Are designed to fit entirely through a non-threaded hole

3. Match each type of washer with the correct image. a. (A) split-ring washer (B) locking washer (C) flat washer b. (A) split-ring washer (B) flat washer (C) locking washer c. (A) flat washer (B) split-ring washer (C) locking washer d. (A) flat washer (B) locking washer (C) split-ring washer

4. Which pair includes the two most common groups of mechanical fasteners? a. Studs and bolts b. Threaded fasteners and non-threaded fasteners c. Retaining rings and split-ring washers d. Locking nuts and hexagonal nuts

5. The castle nut is most often assembled: a. Over a screw, and the screw is then fitted into a hole with a locking washer that bends the castle nut b. After a washer, and a jam nut is assembled after it to lock the castle nut in place c. Onto a bolt, and a cotter pin is fitted through the bolt and bent around the castle nut

6. Match each type of locking component with the correct description. (A) Has bent sections, elastic material, or out-of-round hole to add interference. (B) A flat component fitted over a bolt that is bent over a nut to hold the nut in place. (C) A thin part with a threaded hole that is fitted onto a bolt before a nut to provide extra resistance. a. (A) locking nut (B) flat metal lock (C) jam nut b. (A) flat metal lock (B) locking nut (C) jam nut c. (A) flat metal lock (B) jam nut (C) locking nut d. (A) locking nut (B) jam nut (C) flat metal lock

7. Which statement is true about washers? Washers: a. Are used with bolts but must not be used with screws b. Are likely to deform and fail if used to fasten a slightly larger bolt hole c. Are used to distribute bolt forces and protect the surface of the part

8. Which statement is true about mechanical fasteners used to join parts? Mechanical fasteners: a. Are expensive devices reserved for specialized or difficult joining applications b. Are lightweight but are suitable only for light-duty joints that do not experience heavy forces c. Are easy to assemble and also make it possible to disassemble components

9. Which statement is true about nuts? Nuts: a. Are square-shaped or hexagonal with a hole in the center b. Are weak with low tensile strength and are often assembled in pairs c. Are most commonly assembled with studs

10. Match each screw type with its most common application. (A) Has rounded or cone-shaped end for fastening on a shaft (B) Has two headless, threaded ends often joined with sealant (C) Is used for lighter loads and can be assembled with a nut

a. (A) set screw (B) machine screw (C) stud c. (A) machine screw (B) stud (C) set screw b. (A) machine screw (B) set screw (C) stud d. (A) set screw (B) stud (C) machine screw

11. Which statement is true about bolts? a. Bolts have a stretchable section that is suited for flexible joints. b. Bolts require a nut that is tightened on the threaded end. c. Bolts are light-duty fasteners used for low levels of tension. d. Bolts are designed to fit into threaded holes.

12. Choose the answer that matches each bolt type with the correct image. a. (B) plow bolt (C) carriage bolt (D) socket head cap screw b. (B) dome head bolt (C) plow bolt (D) carriage bolt c. (A) carriage bolt (B) dome head bolt (C) socket head cap screw d. (A) socket head cap screw (B) carriage bolt (C) dome head bolt

13. Match each bolt type with its most common application. (A) Used for buildings and bridges (B) Used for high-strength aircraft joints (C) Used for wood assemblies and farm machinery

a. (A) twelve-point bolts (B) square-head bolts (C) structural bolts b. (A) structural bolts (B) twelve-point bolts (C) square-head bolts c. (A) twelve-point bolts (B) structural bolts (C) square-head bolts d. (A) structural bolts (B) square-head bolts (C) twelve-point bolts

14. Choose the answer that matches each term with the correct feature highlighted in the image. a. (A) shank (B) point (C) head b. (B) head (C) grip length (D) bearing surface c. (D) head (E) grip length (F) shank d. (C) shank (D) point (E) thread length

15. Which statement best describes the common assembly methods for cotter and clevis pins? a. The clevis pin is press fit into a smaller hole by using force, and the cotter pin is inserted through its center. b. The clevis pin is inserted through two components, and the cotter pin is used to prevent motion of the joint and lock components in place. c. The clevis pin is fitted into two holes with clearance, and the cotter pin is inserted through the clevis pin and bent apart.

16. Which statement best describes the use of a bar key for an assembly? Bar keys: a. Must be made of very soft material to allow the bar key to deform under load. b. Join parts such as gears or wheels onto a cylindrical shaft in a specific position. c. Require additional threaded fasteners to lock and clamp the bar key into the keyway.

17. Which list contains the most common types of non-threaded fasteners? a. Pins, keys, snap rings, rivets. b. Keys, snap rings, rivets, screws. c. Snap rings, rivets, screws, nuts. d. Bolts, pins, keys, snap rings.

18. Match each item in the image with the proper term. a. (A) axially assembled ring, (B) radially assembled ring, (C) self-locking ring b. (A) radially assembled ring, (B) self-locking ring, (C) axially assembled ring c. (A) radially assembled ring, (B) axially assembled ring, (C) self-locking ring d. (A) axially assembled ring, (B) self-locking ring, (C) radially assembled ring

19. Which statement best describes push-pull pins? Push-pull pins: a. Have moveable components that expand or contract to lock the pin. b. Demand powered tools for installation and are preferred for automated assembly. c. Are designed for a single, permanent installation. d. Require two interference fits for assembling two or more components together.

20. Which statement is true about dowel pins? Dowel pins: a. Provide very accurate dimensions and surfaces that are free of burrs. b. Are designed for rapid and repeated assembly and disassembly. c. Have a hollow center that allows a pin to be assembled over a shaft.

21. Match each type of rivet with the proper description. (1) Large rivet A. Uses a pull stem that deforms the rivet on the blind side (2) Small rivet B. Used in large volumes for the sheet metal and aircraft industries (3) Pop rivet C. Traditionally used to construct buildings, bridges, and tanks

a. (1) B (2) A (3) C c. (1) B (2) C (3) A b. (1) C (2) B (3) A d. (1) C (2) A (3) B

22. Match each item in the image with the proper term. a. (A) taper pin, (B) spring pin, (C) shear pin b. (A) taper pin, (B) shear pin, (C) spring pin c. (A) spring pin, (B) taper pin, (C) shear pin d. (A) spring pin, (B) shear pin, (C) taper pin

23. Which statement best describes snap rings? Snap rings: a. Must be inserted inside a hole regardless of the design. b. Either fit into a groove or are held in place by friction. c. Are made of hardened materials that prevent the ring from changing shape.

24. Which statement best describes rivets? Rivets: a. Result in much slower production rates than threaded fasteners. b. Are made of very hard material that resists deformation. c. Do not require torque to fasten the joined components together.

25. Match each item in the image with the proper term. a. (A) gib-head key, (B) tapered key, (C) woodruff key b. (A) woodruff key, (B) tapered key, (C) gib-head key c. (A) woodruff key, (B) gib-head key, (C) tapered key d. (A) gib-head key, (B) woodruff key, (C) tapered key

26. The shape of the indentation on a fastener head indicates: a. Fastener diameter c. Driving recess b. Material type d. Head style

27. To determine the length of a hex bolt, you must measure from a. The first thread to the end of the bolt b. The top surface of the head to the end of the bolt c. Under the head to the end of the bolt

28. Which type of driving recess does the image indicate? a. Slotted c. Hex socket b. Phillips d. Robertson 29. Which is the most popular nonferrous fastener material? a. Copper c. Aluminum b. Carbon steel d. Stainless steel

30. Which of the following lists the correct order for installing a bolt? A. Tighten the bolt with the appropriate tool B. Examine the threads in both parts C. Turn the bolt with your fingers D. Apply an surface preparation if necessary

a. D, C, A, B. c. C, A, B, D. b. A, B, C, D. d. B, D, C, A.

31. Most diameters are measured using which part of the fastener? a. Root. c. Head. b. Point. d. Shank.

32. Fastener selection can be a challenge because: a. There is no way to distinguish fasteners. c. Limited varieties of fasteners are b. The assembler must consider many available. factors.

33. A fastener's size is determined by: a. Thread diameter and length. c. Bolt head diameter and length. b. Shank diameter and length.

34. One of the most important characteristics of a bolted joint is: a. Head style. c. Material type. b. Clamping force.

35. Which type of bolt does the image indicate? a. Lag bolt. c. Socket head cap screw. b. Carriage bolt. d. Twelve-point bolt.

36. The identification markings in the image indicate what type of fastener? a. Grade 2. c. Class 10.9. b. Class 5.8. d. Grade 8.

37. Which type of fastener head style does the image indicate? a. Oval head. c. Flat head. b. Hexagonal head. d. Cheese head.

38. Which type of nut does the image indicate? a. Grade 8. c. Grade 5. b. Grade 3.

39. The purpose of a flat washer is to: a. Distribute clamp load over the bearing area. b. Sustain tension in the fastening system. c. Change the length of the fastener.

40. Which list contains common fastener point styles? a. Oval point, binding point, Phillips point. b. Flat point, cone point, gimlet point. c. Truss point, pan point, hex point. HW 8, Math Portion: Force, Density & Pressure DUE Mon, 11/25/15 – Start of class SHOW WORK CLEARLY FOR CREDIT – USE SEPARATE PAPER AS NEEDED. 22 points total