waecE-LEARNING
Technical Drawing Paper 3, Nov/Dec. 2014  
Questions: 1 2 3 4 Main
General Comments
Weakness/Remedies
Strength



Question 5

 

 

The figure below shows a V – block and its clamp.  Parts K of the clamp slide in the slots S of the V – block.

            The clamp is in a central position on the block and holds down a round bar of 20 diameter and 85 long.

            Draw full size, in first angle projection:

  1. sectional front elevation on plane M – M;
  2. sectional end elevation on plane P – P;
  3. plan.

 

(Hidden details need not be shown)


_____________________________________________________________________________________________________
Observation

Most of the candidates did not attempt this question.  The few ones that attempted it did not perform well.  Their major weakness was assemblying the parts.

Candidates were expected to do the following:

  1. Sectional Front Elevation Plane M-M

 

  1. draw in first angle projection;
  2. draw full-size;
  3. draw the outline;
  4. draw centre line and cutting plane P-P;
  5. draw face – J;
  6. draw face – K;
  7. draw face – L;
  8. draw face – M;
  9. draw clamp – N;
  10. draw the bolt – Q;
  11. section face – J;
  12. section the clamp;
  13. write sectional front elevation.
  1. Sectional End Elevation on plane P-P

 

  1. draw in first angle projection;
  2. draw full-size;
  3. draw the outline;
  4. draw two (2) centre lines;
  5. draw the V-block;
  6. draw the groove ;
  7. draw the shaft;
  8. draw the clamp;
  9. draw the bolt;
  10. section the Vee-block;
  11. section the shaft;
  12. section the clamp;
  13. write sectional end elevation.

 

 

  1. Plan
  1. draw in first angle projection;
  2. draw full-size;
  3. draw the outline;
  4. draw centre line and cut plane M-M;
  5. draw face – J ;
  6. draw face – K;
  7. draw shaft – L;
  8. draw face – M;
  9. draw face – N;
  10. draw the clamp;
  11. draw the bolt-head;
  12. write plan.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The solution is shown  below:


Powered by Sidmach Technologies(Nigeria) Limited .
Copyright © 2015 The West African Examinations Council. All rights reserved.