FREE AMT Aircraft Structures and Materials Questions and Answers

Question 1

In a semi-monocoque fuselage, what is the primary function of the longerons and stringers?

Accepted Answer

To act as the primary tension and compression-resisting members in the longitudinal direction.

Answer

In semi-monocoque construction, the skin carries a significant portion of the torsional and shear loads, but the longerons and stringers are the primary members that resist axial (tension and compression) loads due to bending of the fuselage.

Question 2

A technician discovers fine, worm-like tracks under the paint on an aluminum skin panel, particularly in an area of high humidity. What type of corrosion is most likely present?

Accepted Answer

Filiform corrosion

Answer

Filiform corrosion is characterized by its distinctive worm-like appearance and occurs on metal surfaces with an organic coating system, especially in high-humidity environments.

Question 3

Which of the following materials is commonly used for its high strength-to-weight ratio, excellent corrosion resistance, and ability to withstand high temperatures, making it ideal for engine components and critical airframe structures?

Accepted Answer

Titanium alloy

Answer

Titanium alloys are widely used in aerospace for their superior strength-to-weight ratio, resistance to corrosion, and ability to maintain strength at elevated temperatures, which are critical properties for jet engine parts and highly stressed airframe sections.

Question 4

When inspecting a composite honeycomb sandwich structure, what is the primary purpose of the honeycomb core?

Accepted Answer

To stabilize the face sheets and carry shear loads.

Answer

The honeycomb core in a sandwich panel functions to separate the two high-strength face sheets and transfer shear loads between them. This separation dramatically increases the panel's stiffness and resistance to bending, while the core itself stabilizes the face sheets against buckling.

Question 5

A maintenance technician needs to inspect a composite wing panel for suspected subsurface delamination after a minor impact event that left no visible surface damage. Which of the following NDT methods is most suitable for this task?

Accepted Answer

Ultrasonic inspection

Answer

Ultrasonic testing (UT) is the most widely used and effective non-destructive method for detecting subsurface defects like delaminations, voids, and impact damage in composite structures, as sound waves can travel through the material and detect internal anomalies.

(AMT) Aviation Maintenance Technician Practice Test

(AMT) Aviation Maintenance Technician Practice Test

FREE AMT Aircraft Structures and Materials Questions and Answers