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JSS3: BASIC TECHNOLOGY - 1ST TERM

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

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Content:

  • Theory Questions & Answers
    • We have provided answers to the questions, try to attempt the questions yourself without checking the answers.
    • Click on the “View Answers” button to view the answers.

Evaluation Questions:

1. What is timber conversion?

2. Name and discuss two methods of timber conversion.

3. List three (3) properties of good timber.

View Answers

Theory Questions – Timber

 

1. What is timber conversion?

Answer: Timber conversion is the process of splitting logs into commercial or marketable sizes.

 

2. Name and discuss two methods of timber conversion.

Plain Sawn: Also known as Flat Sawn, this is the method of cutting logs linearly or flatly in a horizontal manner to produce planks. This method is simple, quick, and cheaper to use.

Plain sawn

 

Quarter Sawn:

This is the method of splitting a log angularly along the grains on the log. As the name implies, first the log will be cut in a quarter and then cut perpendicularly, with the log’s annual growth rings. It is usually more technical to split wood using this method.

Quarter sawn

 

 

3. List three (3) properties of good timber.

Answer:

  • Straight & Compact Fibres: The fibres of quality timber should be straight and firm.
  • Sweet Smell: Quality timber should smell sweet.
  • Free of Defects: A timber with good quality should be free of knots, shakes, and other defects.

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