Practice Test Geeks(AMT) Aviation Maintenance Technician Practice Test
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General Aircraft Maintenance Knowledge 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 General Aircraft Maintenance Knowledge flashcards as text

  1. When using a micrometer to measure a shaft, the thimble reads 0.275 in and the vernier scale shows 3. What is the actual measurement if the vernier unit is 0.0001 in?

    Answer: 0.2753 in

    The vernier digit (3) adds 3 × 0.0001 in = 0.0003 in to the thimble reading: 0.2750 + 0.0003 = 0.2753 in.

  2. 14 CFR 65.83 requires an A&P certificate holder who has not exercised the privileges of their certificate for more than 24 months to:

    Answer: Satisfactorily complete a refresher course or pass a practical test before resuming certificate privileges

    14 CFR 65.83 requires a certificate holder who has not exercised privileges for 24 consecutive months to complete an FAA-approved refresher course or pass a practical test to resume those privileges.

  3. Which type of corrosion appears as white or gray powdery deposits on aluminum alloy surfaces?

    Answer: Surface (uniform) corrosion producing aluminum oxide deposits

    Uniform surface corrosion on aluminum produces aluminum oxide, which appears as a white or gray powdery or chalky deposit on exposed surfaces.

  4. What is the function of a bonding jumper installed between aircraft components?

    Answer: To equalize electrical potential between components and prevent static charge buildup or spark hazards

    Bonding jumpers create low-resistance electrical paths between components to equalize potential, preventing static discharge sparks and reducing RF interference.

  5. A technician uses dye-penetrant inspection on a non-magnetic titanium fitting. After applying developer, indications appear as bright red lines. What do these lines represent?

    Answer: Surface-open discontinuities (cracks or seams) where penetrant has bled back out

    In color-contrast dye penetrant inspection, red indications on the white developer background mark locations where penetrant trapped in surface-open defects has been drawn back out.

  6. When performing a weight and balance calculation, a technician finds the loaded CG falls 0.5 inches aft of the aft CG limit. The CORRECT course of action is to:

    Answer: Reposition or remove cargo/passengers to move CG within limits before flight

    Any CG that falls outside approved limits makes the aircraft unairworthy — payload must be repositioned or removed to bring the CG within limits before flight.

  7. What is the purpose of the 'B' nut (AN818) used in fluid-line fittings?

    Answer: To clamp a flare sleeve against a fitting, creating a leak-free flared-tube connection

    The AN818 'B' nut threads onto the fitting body and forces the AN819 sleeve and tube flare into the fitting seat, creating a metal-to-metal seal in flared-tube fluid systems.