W01 · Read Engineering Drawings and Tolerances
Drawing Identity and Geometry
Record a drawing’s controlling identity and its view geometry before judging a single dimension.
Worked example — fictional values, for format only. Never use these numbers for an actual flight.
Identity and release
- Drawing number, title, revision, release status
- M9-ED-001, Two-hole plate drawing, Rev B, training extract only — not released for manufacture.
- Sheet number and complete set available
- Sheet 1 of 1.
- Units, scale and projection
- Millimetres; do not scale image; third-angle projection.
- Referenced standards and editions
- None stated on this teaching extract.
- Material, finish and other notes
- Not specified; outside the scope of this teaching extract.
View geometry
- Which face is shown in each view
- Top: 100×60 face; Front: 100×10 face; Right side: 60×10 face.
- Visible, hidden and centerline examples
- Visible: plate outline. Hidden: far wall of each through-hole in front/side views. Centerline: each hole’s axis in the top view.
- Direction of the holes
- Through the 10 mm thickness, confirmed by hidden lines in the front and right-side views, not across the length or width.
- Missing information requiring clarification
- Material specification, finish requirements, and release/approval authority are not present on this teaching extract.
Written response
Describe the part in three sentences without quoting its title.
Explain how another view confirms a feature you could misread from the top view alone.
Fictional data, for format only, see this worksheet’s own chapter for the real regulation and source behind each figure. Never enter this data, or any invented data, into an operational flight plan.