Practice Examination Questions And

Aviation Maintenance Technician (AMT) Practice Examination Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

Covers: General, Airframe, and Powerplant Subjects

• Which of the following materials is most commonly used for aircraft skin

structures?

• Magnesium alloy
• Aluminum alloy
• Titanium
• Stainless steel

Rationale: Aluminum alloys combine light weight, strength, and corrosion

resistance, making them ideal for aircraft skin structures.

• / 4

• What is the primary purpose of a torque wrench?
• Measure bolt length
• Apply a specific amount of force to a fastener
• Remove stripped bolts
• Check bolt hardness

Rationale: Torque wrenches ensure correct preload on fasteners to prevent

over- or under-tightening, critical in aircraft assemblies.

• What is the color of 100LL aviation gasoline?
• Red
• Green
• Blue
• Yellow

Rationale: 100LL (Low Lead) avgas is dyed blue to distinguish it from other

aviation fuels.

• Which document contains instructions for continued airworthiness?
• Service Bulletin
• Airworthiness Directive
• Manufacturer’s Maintenance Manual
• Type Certificate Data Sheet

Rationale: The manufacturer’s maintenance manual includes detailed

maintenance instructions for continued airworthiness. 2 / 4

• What is the effect of excessive heat on aluminum alloys?
• Increases strength
• Reduces strength and hardness
• Improves ductility
• Increases corrosion resistance

Rationale: Overheating aluminum causes loss of temper, reducing strength

and hardness.

• Which type of corrosion is most likely to occur between dissimilar metals?
• Intergranular
• Filiform
• Galvanic
• Surface oxidation

Rationale: Galvanic corrosion occurs when two dissimilar metals are in

contact in the presence of an electrolyte.

• What is the color code for nitrogen used in aircraft maintenance?
• Red
• Green
• Black
• Blue 3 / 4

Rationale: Compressed nitrogen cylinders are color-coded green to identify

the gas.

• What tool is used to check the concentricity of a shaft?
• Micrometer
• Caliper
• Dial indicator
• Torque wrench

Rationale: A dial indicator measures runout or eccentricity with high

precision.

• When performing a magneto timing check, the breaker points should

open when the piston is at what position?

• Top dead center
• Specified degrees before top dead center
• Bottom dead center
• Mid-stroke

Rationale: Breaker points open before TDC to ensure proper spark timing for

efficient combustion.

10. The function of a shock strut is to:

• Support the tail
• / 4