Welding and Fabrication Eng. Craft Practice 2, WASSCE (SC), 2019

Question 3

 

(a) What are fasteners?

(b) With the aid of a sketch, explain raising operation insheet metal work.

(c) (i) List six surface preparatory processes before welding.
(ii) List two marking out tools used in fabrication.

Observation

 

All the candidates that attempted this question did not attempt satisfactorily questions 3(a) and 3(b). The solution of the poorly attempted part of the question is given below.


(a) Fasteners
Fasteners are devices that are used to hold work pieces together.

(b) Illustration of Raising Operation in Sheet Metal Work



Explanation
- Drawing of concentric circles on the workpiece
- Placing on the raising stake
- Shaping from the centre towards the edge