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Questions and Answers
What is Technical Graphics?
Graphical representation of an object on paper.
What is Computer-Aided Design (CAD)?
Graphical representation of an object using computer software.
Which of the following tools are used for technical graphics? (Select all that apply)
What is the full distance around a circle called?
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What is the distance from the center of the circle to the circumference called?
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What do we call the point of intersection between two straight lines?
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What is angle bisector?
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What does orthographic projection mean?
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How many views are used in orthographic projection?
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Study Notes
Technical Graphics vs Computer-Aided Design (CAD)
- Technical Graphics: Visual representation of an object on paper using drawing tools.
- CAD (Computer-Aided Design): Visual representation of an object using computer software.
- Tools for technical graphics: pencil, set squares, protractor, and compass.
Basic Constructions
- Pencil: Drawing different types of lines, lettering, freehand sketching.
- Set squares: Drawing vertical and inclined lines.
- Protractor: Drawing angles from 0° to 180°.
- Compass: Drawing circles and arcs accurately.
Circle Terminology
- Circumference: The entire distance around a circle.
- Diameter: The distance across a circle passing through the center.
- Radius: The distance from the center of the circle to a point on the circumference.
- Arc: A section or part of the circumference of a circle.
Angle Terminology
- Angle: Formed when two lines intersect at a point.
- Vertex: The point where the lines meet.
- Arms: The two lines making up the angle.
Orthographic Projections
- Orthographic Projection: Representing 3D objects in different 2D views.
- Number of views: Front, Side (right), Plan (top).
Hidden Lines in Orthographic Projections
- Hidden lines are used to show features not immediately visible in the view.
Orthographic Projections of Curved Surfaces
- Orthographic projections of cylinders, cones, and other curved surfaces demonstrate the shape from different viewpoints.
Orthographic Projection of Geometric Solids
- Orthographic projections of geometric solids utilize different views to capture the complete shape.
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