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JSS3: BASIC TECHNOLOGY - 1ST TERM

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  1. Materials & Processing - Timber I
    6 Topics
    |
    1 Quiz
  2. Materials & Processing - Timber II
    4 Topics
    |
    1 Quiz
  3. Processing of Materials - Metals
    5 Topics
    |
    1 Quiz
  4. Processing of Clay, Ceramics and Glass
    5 Topics
    |
    1 Quiz
  5. Methods of Producing Plastics & Rubber
    2 Topics
    |
    1 Quiz
  6. Drawing Practice - Isometric Drawing
    4 Topics
    |
    1 Quiz
  7. Oblique Projection
    2 Topics
    |
    1 Quiz
  8. Orthographic Projection
    4 Topics
    |
    1 Quiz
  9. Perspective Drawing (One - Point Perspective Drawing)
    4 Topics
    |
    1 Quiz
  • excellence
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Topic Content:

  • Defects in Timber
    • Natural Defects
      • knots, shakes, etc.
    • Artificial Defects
      • bow, crook, cup, etc.

What are Timber Defects?

Timber defects are faults or irregularities in wood, caused either naturally or during the processing of the wood, which reduces the value or quality of the timber. Defects in timber can be Natural or Artificial .

Natural Defects:

This is a result of faults, or problems, 

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