Sheet Metal Structures Flashcards
7 cards from real Airframe Mechanic Certification practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Sheet Metal Structures flashcards as text
When selecting a replacement rivet after removing a damaged rivet, what size rivet should typically be used if the hole is not damaged?
Answer: Same diameter and same length as the original
If the hole is undamaged, the replacement rivet should be the same diameter and appropriate driven length as the original specification.
Which alclad aluminum alloy sheet is most commonly used for aircraft skin applications due to its high strength-to-weight ratio?
Answer: 2024-T3
2024-T3 alclad is the most common aircraft skin material, offering high strength combined with the corrosion protection of the pure aluminum cladding.
A scratch or gouge in aluminum skin that does not penetrate more than 10% of the sheet thickness is typically classified as:
Answer: Negligible damage requiring no repair
Scratches not exceeding 10% of sheet thickness are generally classified as negligible damage and require only cleaning and protective treatment.
When riveting near a formed flange or edge, which direction should the bucking bar force be applied relative to the rivet shank?
Answer: Parallel to the rivet shank (axially)
The bucking bar must be held perpendicular to the sheet surface and aligned axially with the rivet shank to form a properly shaped driven head.
What is the primary advantage of using a flush (countersunk) rivet on external aircraft skin?
Answer: It reduces aerodynamic drag by maintaining a smooth surface
Flush rivets create a smooth aerodynamic surface by seating the head level with the skin, reducing drag compared to protruding head rivets.
The K-factor in sheet metal bending is used to determine:
Answer: The location of the neutral axis within the material thickness
The K-factor defines the position of the neutral axis within the material thickness, which determines accurate bend allowance calculations.
Which statement about deburring rivet holes in sheet metal is correct?
Answer: All rivet holes must be deburred to remove sharp edges that could initiate cracks
All rivet holes must be deburred because sharp edges and burrs concentrate stress and can initiate fatigue cracks.