ENGINEERING GRAPHICS AND DESIGN
PAPER 2
GRADE 12 
NSC PAST PAPERS AND MEMOS
NOVEMBER 2016

INSTRUCTIONS AND INFORMATION 

  1. This question paper consists of FOUR questions. 
  2. Answer ALL the questions. 
  3. ALL drawings are in third-angle orthographic projection, unless otherwise stated. 
  4. ALL drawings must be completed using instruments, unless otherwise stated.
  5. ALL answers must be drawn accurately and neatly.
  6. ALL the questions must be answered on the QUESTION PAPER as instructed. 
  7. ALL the pages, irrespective of whether the question was attempted or not, must be re-stapled in numerical sequence in the TOP LEFT-HAND CORNER ONLY.
  8. Proper planning is essential in order to complete all the questions.
  9. Print your examination number in the block provided on every page.
  10. Any details or dimensions not given must be assumed in good proportion.

QUESTIONS 

QUESTION 1: ANALYTICAL (MECHANICAL) 
Given:
Three views of a trigger mechanism assembly, an enlarged view, a parts list, a title block and a table of questions. The drawings have not been prepared to the indicated scale. 
Instructions:
Complete the table below by neatly answering the questions, which refer to the accompanying drawings and the title block. [30]

p2 1

  QUESTIONS   ANSWERS
 1 What was Francu's responsibility?   1
 2 What drawing method was used to prepare the drawings?    1
 3 What scale is indicated for the drawing?    1
4 What should all the unspecified radii be?   1
5 What material is used to manufacture the striking pin?   1
6 Name the type of finish at A.   1
7 Name the type of finish at B.   1
8 What is VIEW 3 called?   1
9

Determine the complete dimensions at :

C:
D:
E:

  3
10 How many parts make up the trigger mechanism assembly?   1
11 What is the purpose of the enlarged view at F?   1
12 How many surfaces need to be machined?   1
13 What direction of lay must be applied to the machined surfaces?   1
14 What is the screw thread specification of the stud nut at G?   2
15 With reference to the tolerance, determine the maximum height of the feature at  H.   2
16 Referring to the parts list, identify the part at J.   1
 17  In the space above the parts list(ANSWER 17), complete the view of the trigger plate by neatly constructing R10 fillet. 
SHOW ALL CONSTRUCTION.
   3
 18  In the space below (ANSWER 18), draw , in neat freehand, the convention for a coll spring.    3
 19  In the space below (ANSWER 19), draw, in neat freehand, the symbol for the projection system used.    4
TOTAL     30


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Last modified on Friday, 03 September 2021 08:08