Question 5
(a) Explain the following design terms:
(i) pre-conceived idea;
(ii) annotation.
(b) Explain the following terms in machining:
(i) chamfering;
(ii) knurling.
(c) State two safety precautions that should be observed when chiseling.
(d) Sketch a straight knurling machine.
Observation
The candidates’ responses to part (a) were not correct, the other parts were well responded to. The required responses to part (a) are as follows:
(i) pre-conceived idea: An opinion formed beforehand without adequate evidence.
(ii) annotation: A note added to the possible solution to explain the
drawing in terms of shape, material, construction , function and reasons for accepting or rejecting the solution.