Metal Works 2, WASSCE (PC 2ND), 2019

Question 5

What is the importance of lubricating a machine?
Explain the following lathe operation:
1. Boring;
2. Facing.
Explain the following heat treatment processes
1. Annealing;
2. Normalizing.
1. State one use of an angle plate.
2. Explain why vice clamps are fitted on vice jaws.

Observation

Candidates had good performance in this question. However, part (d) of the question was difficult for the candidates. The required response to part (d) of the question is:

1. Angle plate is use to support work when using the surface gauge for marking out.
2. Vice-camp are fitted on vice jaws to prevent marks on the finished workpiece.