Question 4
(a) Name a suitable chisel for each of the following operations:
(i)cutting keyways
(ii)correcting offset holes
(iii) cutting oil grooves.
(b) Sketch each of the following soldering joints
(i)lap joint
(ii)butt joint
(iii)corner lap joint.
(c) State the situation in which each of the following should be used:
(i) goggles;
(ii) leather gloves;
(iii) face mask.
Observation
This question also did not pose any difficulty to the candidates. The expected responses are as given below:
4 (a)
(i)Naming a suitable chisel for each of the following operations:
- Cutting key ways: Cross-cut/cape chisel;
- Correcting offset holes: Diamond chisel;
- Cutting oil grooves: Half round chisel
(ii)Sketching the following soldering joints
(iii)Lap joint
(ii)Butt joint
(iii) corner lap joint
(b) Stating the situation in which each of the following should be used:
- Goggles – grinding, welding, drilling, bench fitting.
- Leather gloves – casting, welding, forging.
- Face mask – casting, forging, welding, drilling and spraying