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JSS3: BASIC TECHNOLOGY - 2ND TERM
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Scales & Scale Drawing | Week 12 Topics|1 Quiz
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Simple Blueprint Reading | Week 22 Topics|1 Quiz
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Basic Building Symbols and Components | Week 38 Topics|1 Quiz
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WoodWork Project | Week 43 Topics|1 Quiz
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WoodWork Project - Non-Wood Materials | Week 51 Topic|1 Quiz
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MetalWork Project | Week 65 Topics|1 Quiz
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Soldering & Brazing | Week 72 Topics|1 Quiz
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Machine Motions I | Week 83 Topics|1 Quiz
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Machine Motions II | Week 92 Topics|1 Quiz
Lesson 1,
Topic 1
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Scale Drawing
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Topic Content:
- Definition of Scale Drawing

What Is Scale Drawing?
Scale drawing can be defined as the drawing of lines and objects to any given proportion or ratio. It is an accurate representation of an object.
There are several reasons for drawing to scale. Objects may be too large or too small, for example, the map of Nigeria which will be too large to draw when using the real dimensions. The size of the object is reduced when it is too large or increased when it is too small.
There are three ways of specifying scales on a drawing:
a. Full-size scale.
b. Reduction size scale.
c. Enlarged scale.



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