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ASSIGNMENT 3-Cont. - 14018_716
ASSIGNMENT 3-Cont. - 14018_718

Aviation Structural Mechanic (H&S) 3&2 - How airplanes are built and how to maintain them
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3-25. Hi-torque bolts are installed with what tool? 1. An Allen wrench 2. A socket wrench 3. A special driver adapter 4. A Reed-and-Prince screwdriver IN ANSWERING QUESTIONS 3-26 THROUGH 3-28, SELECT FROM COLUMN B THE STATEMENTS THAT EXPLAIN THE LETTERS OR NUMBERS OF THE BOLT DESIGNATION AN4CH-20 LISTED IN COLUMN A. NOT ALL ITEMS IN COLUMN B WILL BE USED. A. LETTERS/ B. STATEMENTS NUMBERS 3-26. 4 1. The bolt is 2 1/32 in. 3-27. C long 3-28. H 2. The bolt diameter is 1/4 inch 3. The bolt head is drilled for safetying 4. The bolt is made of corrosion- resistant steel 3-29. Aircraft nuts are divided into what two general groups? 1. Self-1ocking and nonself- locking 2. Metal insert and fiber insert 3. High temperature and common 4. Ferrous and nonferrous 3-30. Which of the following is an example of an all-metal self- locking nut? 1. A wing nut 2. A flexloc nut 3. An elastic stop nut 4. An internal-wrenching nut 3-31. Which of the following types of nuts are designed to be used with cotter pins or safety wire? 1. Check nuts 2. Plate nuts 3. Castle nuts 4. Barrel nuts 3-32. 3-33. 3-34. 3-35. 3-36. 3-37. 3-38. When an assembly is frequently removed, which of the following types of nuts should be used? 1. Wing nuts 2. Shear nuts 3. Klincher locknuts 4. Sheet spring nuts Which of the following types of nuts are used to ensure a permanent and vibrationproof connection? 1. Wing nuts 2. Shear nuts 3. Klincher locknuts 4. Sheet spring nuts What three types of screws are most commonly used in aircraft construction? 1. Machine, structural, and self- tapping screws 2. Brazier-head, round-head, and common screws 3. Self-tapping, Phillips, and common screws 4. Structural, machine, and pan- head screws Which of the following types of screws are as strong as bolts of the 1. 2. 3. 4. same size? Setscrews Machine screws Structural screws Self-tapping screws Flush-head machine screws are available in what degree(s) of head angle? 1. 82° only 2. 82° and 100° only 3. 82°, 100°, and 125° only 4. 82°, 100°, 125°, and 145° When replacing an original screw in a structure, you should NOT use which of the following screws? 1. A setscrew 2. A machine screw 3. A structural screw 4. A self-tapping screw You should use ball socket and seat washers in which of the following situations? 1. With studs 2. Under taper pin nuts 3. With sheet spring nuts 4. When bolts are installed at an angle to the surface 13







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