Machine WoodWorking2, WASSCE (SC), 2021

Question 1

 

Question 1 required candidate to:

  1. Explain the term defect.
  2. State causes of timber defect.
  3. Sketch the following timber defects: (i) end check (ii) heart shake (iii) twist

Observation

 

Majority of the students answered the questions on timber defect accurately, however some of them could not give a proper sketch:

The expected responses are:

 

 

Sketch of the timber defects:

end check

heart shake

 twist