Airframe Structures Flashcards
7 cards from real AMT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Airframe Structures flashcards as text
When repairing aircraft skin using a flush patch, the rivet pattern must maintain what minimum edge distance from the rivet centerline to the edge of the patch?
Answer: 2 times the rivet diameter
The minimum edge distance for aircraft rivets is 2D (two times the rivet diameter) measured from the rivet centerline to the nearest edge.
An aircraft's empennage provides what primary function?
Answer: Provides stability and control in pitch and yaw
The empennage (tail assembly) provides longitudinal (pitch) and directional (yaw) stability and control through the horizontal and vertical stabilizers.
What is the purpose of an anti-icing "hot section" inside a wing leading edge?
Answer: Prevent ice formation by heating the leading edge surface
Leading-edge anti-icing systems use heated bleed air or electrical elements to prevent ice from forming on the wing's leading edge during flight.
Which type of corrosion creates a network of cracks along grain boundaries in high-strength aluminum alloys under sustained tensile stress?
Answer: Stress corrosion cracking
Stress corrosion cracking (SCC) occurs when tensile stress and a corrosive environment combine to produce cracks that propagate along grain boundaries.
A mechanic discovers a dent in an aluminum wing skin that does NOT crack the surface and is not near a rivet or seam. According to typical aircraft repair guidance, this damage may be considered:
Answer: Negligible if within allowable limits defined in the aircraft SRM
Small smooth dents away from structural features may fall within negligible damage limits defined in the aircraft's Structural Repair Manual (SRM).
In an all-metal aircraft structure, what is the primary purpose of a "doubter" (doubler) plate?
Answer: Reinforce a cutout or repair area by distributing stress
A doubler plate is added over a cutout, repair, or high-stress area to restore original structural strength by distributing load around the discontinuity.
The "neutral axis" of a structural beam under bending is the location where:
Answer: Neither tensile nor compressive stress exists
The neutral axis is the plane within a beam where bending stress is zero, with tension on one side and compression on the other.