Flashcards on Aerospace Engineering: Materials and Maintenance
Aerospace Engineering: Materials and Maintenance Guide
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Aircraft Maintenance and Welding Procedures
12 cards
Card 1
Question: How can the correct grip length of a bolt be determined?
Answer: Grip length is the unthreaded portion of the bolt shank and should equal the total thickness of the materials being bolted together.
Card 2
Question: What is the smallest cable diameter that can be used in primary control systems?
Answer: 1/8-inch diameter.
Card 3
Question: How tight should the nut be on a clevis bolt used to attach a cable fitting to a control surface horn?
Answer: The nut should not be so tight that it prevents the clevis bolt from turning in the cable fitting and the horn.
Card 4
Question: Why must the surface of clad aluminum alloy not be scratched?
Answer: The pure aluminum cladding is noncorrosive, but the underlying alloy is susceptible to corrosion; scratching through the cladding can allow corrosion
Card 5
Question: What determines the size of the tip to be used when gas welding steel?
Answer: The size of the tip orifice.
Card 6
Question: How should welding flux be removed from aluminum after gas welding?
Answer: Scrub it off with hot water and a bristle brush.
Card 7
Question: What must be done to an old welded joint before rewelding?
Answer: All traces of the old weld must be removed so the new weld will penetrate the base metal.
Card 8
Question: What should be the depth of penetration when making a fillet weld?
Answer: Penetration should be 25 to 50 percent of the thickness of the base metal.
Card 9
Question: For a butt weld, what should the weld bead width and penetration be?
Answer: Bead width should be 3 to 5 times the thickness of the base metal, with 100 percent penetration.
Card 10
Question: How are AN-type aircraft bolts identified?
Answer: By code markings on the bolt heads.