Engineering Drawing Introduction PDF
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Uploaded by ProficientTheory
Egyptian Academy for Engineering and Advanced Technology (EAEAT)
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Summary
This document introduces fundamental concepts in engineering drawing, covering straight-line and curved-line letters, types of lines, and illustrative exercises. It's a great resource for understanding basic techniques.
Full Transcript
# Straight-Line Letters - IL - TFEHVA - WMNK - XYZ # Curved-Line Letters - O - Q - C - G - JUD - PRB - 83S2 - 1069475& # Curved-Line Letters and Numerals - The letters QQ, C, G, and O are based on a true circle. The lower portion of the J and U is elliptical. - The 8 is composed of two ellipses...
# Straight-Line Letters - IL - TFEHVA - WMNK - XYZ # Curved-Line Letters - O - Q - C - G - JUD - PRB - 83S2 - 1069475& # Curved-Line Letters and Numerals - The letters QQ, C, G, and O are based on a true circle. The lower portion of the J and U is elliptical. - The 8 is composed of two ellipses. The 3, S, and 2 are based on the 8. - The 0, 6, and 9 are elliptical. # Type of Lines | Type of Lines | Width and Character of Lines | Applications | |---|---|---| | **Visible Line** | THICK Approx. width 0.7mm | | | **Hidden Line** | THIN Approx. width 0.5mm | | | **Section Line (Hatching)** | THIN Approx. width 0.35mm | | | **Centre Line** | THIN 20-40mm | | **Dimensionline Extension Line Leader** | THICK | | **Cutting- Plane or Viewing-Plane Lines** | THICK | | **Short-break line **| THIN Freehand| | **Long-break line** | THIN 20-40mm | | **Phantom line** | THIN | | **Chain line** | THICK 10-20mm | | **Stitch line** | THIN | ## Exercise Drawing of straight lines and circles according to the patterns by means of drawing instruments. Location and dimension of figures are given. These will be drawn with pencil. The students must keep correctly the connections and crossing of lines with required precision. The relative thickness of lines and their performance must be kept according to the principles of engineering drawing.
