Blueprint Reading & Interpretation Flashcards

On an aircraft assembly drawing, what does a hidden line (dashed line) represent?

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.

What is the purpose of a revision block on an aircraft engineering drawing?

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.

Which type of section view cuts only partway through a part to reveal an internal feature?

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.

On a structural drawing, what does GW stand for in the context of material callouts?

Answer: Gross Weight

GW in aircraft structural contexts typically refers to Gross Weight, a critical design parameter affecting structural load requirements.

What information is typically found in the title block of an aircraft drawing?

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.

A drawing note reads 'BREAK ALL SHARP EDGES .010 MAX.' What does this instruction require?

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.

What does a phantom line (long-short-short dash pattern) typically indicate on an aircraft drawing?

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.