Metal Works 2, WASSCE (SC), 2017

Question 3

 

(a)        (i)         Explain the term design brief.
            (ii)        State two reasons for writing specification in designing.
(b)        State three operations that can be carried out on the shaping machine.

(c)        State the difference between speed and feed in turning operation.


Observation

 

Question 3(a) (i) was not correctly responded to. The candidates explained design instead of design brief. Other parts of the question were well attempted by the candidates. The required responses are as given below.
            3(a)      (i)         Explaining the term design brief

A short statement that describes what the designer intends to do.

  • Stating two reasons for writing specification

 

-   It is to serve as a guide.
-   It is to list the requirements of the design.
-   It is to help to evaluate the artifact

 

(b)        State three operations that can be carried out on the shaping machine

  • Horizontal shaping
  • Vertical shaping
  • Groove  cutting
  • Keyway  cutting
  • Angular shaping            

(c)        Stating the difference between speed and feed in turning operation
Feed is the depth the drill penetrates into the work per revolution while speed is the circumferential distance the cutting edge of a tool moves per unit time.