AM Blueprint Reading & Interpretation 2 — Questions and Answers
Question 1: On an aircraft assembly drawing, what does a hidden line (dashed line) represent?
- A surface that is visible from the viewing angle
- An edge or feature not visible from the current viewing angle (Correct answer)
- A centerline for symmetrical parts
- A dimension reference line
Correct answer: An edge or feature not visible from the current viewing angle
Hidden lines (dashed) show edges or features that exist behind or inside a part but cannot be seen from the current viewing direction.
Question 2: What is the purpose of a revision block on an aircraft engineering drawing?
- To list all approved manufacturers for the part
- To record changes made to the drawing after initial release (Correct answer)
- To show the part's inspection intervals
- To indicate the drawing scale and units
Correct answer: To record changes made to the drawing after initial release
The revision block documents all changes to a drawing, including revision letter, description of change, date, and approval signature.
Question 3: Which type of section view cuts only partway through a part to reveal an internal feature?
- Full section
- Half section
- Broken-out section (Correct answer)
- Revolved section
Correct answer: Broken-out section
A broken-out section removes a small portion of the exterior to expose an internal feature without cutting the entire part.
Question 4: On a structural drawing, what does GW stand for in the context of material callouts?
- Gross Weight (Correct answer)
- Galvanized Wire
- Ground Wire
- Grain Width
Correct answer: Gross Weight
GW in aircraft structural contexts typically refers to Gross Weight, a critical design parameter affecting structural load requirements.
Question 5: What information is typically found in the title block of an aircraft drawing?
- Part number, drawing number, scale, material, and approvals (Correct answer)
- Inspection intervals and airworthiness limits
- List of all assemblies the part is used in
- Tolerances for all dimensions on the drawing
Correct answer: Part number, drawing number, scale, material, and approvals
The title block contains identifying information including part/drawing number, scale, material specification, revision level, and approval signatures.
Question 6: A drawing note reads 'BREAK ALL SHARP EDGES .010 MAX.' What does this instruction require?
- Remove all edges that exceed .010 inches in length
- Deburr or chamfer all sharp edges to a maximum radius of .010 inches (Correct answer)
- Mark all edges that are sharper than .010 degrees
- Apply a coating to edges with a maximum thickness of .010 inches
Correct answer: Deburr or chamfer all sharp edges to a maximum radius of .010 inches
This note requires all sharp edges to be deburred or chamfered so that no sharp edge exceeds a .010-inch radius or chamfer.
Question 7: What does a phantom line (long-short-short dash pattern) typically indicate on an aircraft drawing?
- The outline of a removed section
- An alternate position of a moving part or adjacent assembly (Correct answer)
- A surface that requires a special finish
- The parting line of a casting or forging
Correct answer: An alternate position of a moving part or adjacent assembly
Phantom lines show alternate positions of moving components, repeated detail, or the outline of adjacent parts not part of the subject drawing.
AM Blueprint Reading & Interpretation 2
On an aircraft assembly drawing, what does a hidden line (dashed line) represent?