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Role of Engineering Drawing: The engineering drawing subject is designed to impart the following skills: 1. Ability to read and prepare engineering drawings. 2. Ability to make free - hand sketching of objects. 3. Power to imagine, analyze and communicate. 4. Capacity to understand other subjects.
1. Draw a line AB equal to the given length of side. 2. Bisect AB at P. 3. Draw a line BQ equal to AB in length and perpendicular to AB. 4. With centre P and radius PQ, draw an arc intersecting AB produced at R. AR is equal to the diagonal length of the pentagon. 5. With centres A and B and radii AR and AB respectively draw arcs intersecting at ...
The purpose of this guide is to give you the basics of engineering sketching and drawing. We will treat “sketching” and “drawing” as one. “Sketching” generally means freehand drawing. “Drawing” usually means using drawing instruments, from compasses to computers to bring precision to the drawings. This is just an introduction.
used for preparation of drawings. • Standards – set of rules for preparation of technical drawings. Conventions – commonly accepted practices in technical drawings. • Tools – devices used to create technical drawings and models. • Applications – the various uses for technical drawings.
Drawing an arc tangent to a given point on the line Steps • Given line AB and tangent point T. Construct a line perpendicular to line AB and through point T. • Locate the center of the arc by making the radius on the perpendicular line. Put the point of the compass at the center of the arc, set the compass for the radius of the arc, and ...
To prepare a drawing, one can use manual drafting instruments (figure 12) or computer-aided drafting or design, or CAD. The basic drawing standards and conventions are the same regardless of what design tool you use to make the drawings. In learning drafting, we will approach it from the perspective of manual drafting. If the drawing is made
Drawing Tangent and Normal to any conic. When a tangent at any point on the curve (P) is produced to meet the directrix, the line joining the focus with this meeting point (FT) will be at right angle to the line joining the focus with the point of contact (PF).
