Use the spaces provided below to draw the .BS (British Standard). Convention for representing
(i) Internal screw thread;
(ii) Double’ conical tension spring.

 

OBSERVATION

This question tested Candidates' ability to use freehand to draw, recognize and represent the standard convention for representing tools and other engineering elements. The expected solution is shown below. Candidates' performance was poor because most candidates were generally poor in freehand sketching.

                    

SCREW THREAD                                     11 DOUBLE CONICAL SPRING