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
What is the primary advantage of a delta wing configuration over a conventional swept wing at supersonic speeds?
Answer: Lower wave drag and improved structural efficiency at high speed
Delta wings provide lower wave drag and a stiffer structural box at supersonic speeds, making them aerodynamically and structurally efficient for high-speed flight.
When inspecting an aircraft for fatigue cracks, which area of a pressurized fuselage requires the most thorough inspection?
Answer: Door and window cutout corners and skin lap joints
Corners of cutouts and skin lap joints in pressurized fuselages experience the highest stress concentration cycling and are primary fatigue crack initiation sites.
What is the correct procedure when a rivet hole must be enlarged to the next oversize diameter during repair?
Answer: Ream or drill to the oversize dimension and install an appropriately sized oversize rivet
When a hole is enlarged, it must be reamed or drilled to the proper oversize dimension and an oversize rivet of the matching diameter installed.
Which structural design philosophy assumes a primary structure will crack but defines inspection intervals to ensure the crack is found before it reaches critical length?
Answer: Damage tolerance design
Damage tolerance design acknowledges crack growth will occur and sets inspection intervals based on crack propagation rates to find cracks before they become critical.
A technician notices white powder deposits around a wing skin lap joint on an aluminum aircraft. This most likely indicates:
Answer: Active corrosion (aluminum oxide) between the mating surfaces
White powdery deposits (aluminum oxide) forming at lap joints are a classic sign of active corrosion occurring between the faying surfaces.
What is the structural purpose of intercostal members in an aircraft fuselage?
Answer: Provide support between frames to maintain skin rigidity and carry local loads
Intercostals span between fuselage frames to stabilize the skin, transfer local loads (such as floor beam reactions), and maintain structural continuity.
During a walk-around inspection of a composite control surface, a mechanic presses on the surface and hears a dull "thud" instead of a solid sound. This is most consistent with:
Answer: Delamination or disbond of the face sheet from the core
A dull or hollow sound during coin-tap testing of a composite surface indicates delamination or disbonding, where face sheets have separated from the core.