Practice Test Geeks(AM) Aircraft Maintenance Certification Practice Test
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Blueprint Reading & Interpretation Flashcards

7 cards from real AM practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Blueprint Reading & Interpretation flashcards as text

  1. On an aircraft drawing, what does the notation 'SYMM ABOUT CL' indicate?

    Answer: The part or feature is symmetrical about the centerline and only half needs to be dimensioned

    SYMM ABOUT CL means the part or feature is symmetrical about the centerline, so only one half is dimensioned and the other half mirrors it.

  2. What is a 'zone' designation (e.g., 'ZONE B4') on a large aircraft drawing used for?

    Answer: To locate a specific area on the drawing sheet using a grid system

    Zone designations use a letter-number grid system on large drawings to help locate specific features or notes quickly.

  3. An aircraft drawing calls out 'FINISH PER SPEC MIL-A-8625 TYPE II CLASS 1'. What process does this specify?

    Answer: Anodizing treatment for aluminum

    MIL-A-8625 Type II Class 1 specifies sulfuric acid anodizing for aluminum alloys, providing corrosion protection and improved adhesion.

  4. What does WL 100.0 designate in aircraft structural drawings?

    Answer: Water Line 100.0 — a horizontal reference plane at 100 inches above the ground datum

    WL (Water Line) is a horizontal reference plane parallel to the ground, measured in inches from the lowest structural datum to locate vertical positions.

  5. On an aircraft electrical drawing, what does a triangle with its apex pointing downward connected to a wire represent?

    Answer: An electrical ground connection

    A downward-pointing triangle connected to a conductor is the standard symbol for an electrical ground connection in aircraft wiring diagrams.

  6. What is the purpose of a 'LIST OF MATERIALS' or 'BILL OF MATERIALS' (BOM) on an aircraft assembly drawing?

    Answer: To identify each part number, quantity, material spec, and description of items in the assembly

    The BOM (Bill of Materials) on an assembly drawing lists every item in the assembly with its part number, quantity required, material specification, and description.

  7. A rivet callout on an aircraft structural drawing reads 'MS20470AD4-5'. What does 'AD' indicate?

    Answer: 2117-T4 aluminum alloy (soft aluminum)

    In the MS20470 rivet specification, 'AD' designates the material as 2117-T4 aluminum alloy, the most common aircraft rivet material.