waecE-LEARNING
Technical Drawing Paper 2, Nov/Dec. 2012  
Questions: 1 2 3 4 5 6 7 8 9 10 Section B 1 2 Main
General Comments
Weakness/Remedies
Strength



Section B

MECHANCIAL DRAWING

2.  The figure below shows the details of a pulley unit in first angle projection. 
The pulley is held by means of a shaft with washer at face X and secured by a collar and pin at face Y of the body.

Draw full size and in first angle projection, the following views of the assembly:

  1. sectional plan on plain KK;
  2. sectional front elevation on plain PP;
  3. end elevation in the direction of arrow N.

(No hidden details are required)

(a)       Sectional Plan K - K

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Observation

Candidates were expected to:

  1. draw in first angle projection;
  2. draw in full size;
  3. draw the centre line and the outline;
  4. draw the pulley, washer, collar and pin in place;
  5. draw the boss (upper/lower);
  6. section the pulley and the washer;
  7. section the pulley, washer, boss and the collar;
  8. draw the two holes.

(b)       Sectional front elevation P – P

            Candidates were expected to:

  1. draw in first angle projection;
  2. draw in full size;
  3. draw the shaft, pulley, washer, collar and the pin all in the right piece;
  4. draw the web and base;
  5. draw the cutting plane  P – P;
  6. section the pulley, washer, boss, collar and the base.

(c)        End elevation in the direction of arrow N

                        Candidates were expected to:

  1. draw in first angle projection;
  2. draw in full size;
  3. draw the outline;
  4. draw 3 centre lines, 2 circles and 3 webs;
  5. draw the base and the cutting plane.

The solution is shown below

 

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