Observation

Candidates were expected to do the following:

1. state three general safety precautions during the use of woodworking machines;
2. list the two operations required for keeping the cutting edge of a tools keen;
3. state one reason why lubricant is used on an oil stone when sharpening a tool.

Candidates performed well in this question but some of them could not state the safety precautions when using a woodworking machine the where stating general workshop safety.

The solution is stated below:

(A)       General safety precautions on the use of woodworking machines

-           never get distracted while operating a machine
-           never leave a machine until it has stopped running
-           always isolate the machine and clean it after use
-           never make any  adjustment to machine while it is running
-           allow machine to reach maximum speed before feeding
-           make adequate use of guards and safety devices
-           wear goggles or eye shield when using machines which produce dust, chips or shavings
-           no running or fooling around
-           only the machine operator should operate the switches and controls of a machine
-           examine the materials to be worked upon before feeding the machine

(B)       The operations required to keep the cutting edge of a tool keen
-           grinding
-           sharpening/honing
-           lapping
-           polishing

(C)       Reason why a lubricant is used on an oilstone when sharpening a tool

-           to aid the movement of the tool over the stone
-           to  reduce friction
-           to float away the particles of steel which are rubbed from the tool
-           to reduce the clogging of the oil stone