waecE-LEARNING
Woodwork Paper 2, May/June 2014  
Questions: 1 2 3 4 5 6 Main
General Comments
Weakness/Remedies
Strength

QUESTION 3

(FOR CANDIDATES IN NIGERIA ONLY)

  1. The table below shows four classes of timber defects

Seasoning

Decay

Growth

Insect Attack

 

 

 

 

 

 

 

 

 

Copy the table and use it to classify the following timber defects:

check                                      split
knot                                         wet rot
dry rot                                     borers
wane                                       warp
case hardening                     sharp

            (b)       (i)         List the two main classifications of plastics.
(ii)        Explain the difference between the two classes of plastics listed in 3(b)(i).

OBSERVATION

Most candidates were able to:

-           list the main classifications of plastics;
-           explain the difference between the two classes of plastics.

However, they were unable to classify the given timber defects.

The expected response to question 3 is as given below:

  1. Classes of timber defects

 

Seasoning

Decay

Growth

Insect Attack

 

Check
Warp
Split
Case hardening

 

Dry rot
Wet rot

 

Knot
wane

 

Borers

                        (b)       (i)         Thermosetting plastics and Thermoplastics

                                    (ii)        Thermosetting plastics cannot be remoulded by heating while
                                                thermoplastics can be remoulded by heating.

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