Question 5
(a) State one result of each of the following when working on the centre
lathe
(i)Cutting tool set too high above the centre line.
(ii)Cutting tool set too low below the centre line.
(b)(i) List two striking tools used in sheet metalwork.
(ii) Sketch any one of the tools listed in 5(b)(i)
(i)Label two parts of the tool sketched in 5(b)(ii).
(ii)With the aid of a sketch show the process of swaging in forging.
Observation
Most of the candidates could not provide correct responses to 5 (a). The required responses are given below.
5(a) Stating one result of each of the following when working on the centre lathe
(i) Cutting tool set too high above the centre line
- It will increase the top rake angle.
- It will decrease the front clearance angle.
(ii) Cutting tool set below the centre line
- It will increase the front clearance angle.
(b)(i) Listing two striking tools used in Sheet Metalwork
- Mallet
- Bossing hammer
(ii) Sketching any one of the tools listed in 5(b)(i)
(iii) Labelling any two parts of the tool sketched in 5(b)(ii)
(c) Sketching to show the process of swaging in forging
