waecE-LEARNING
Automobile Parts Merchandising Paper 1, May/June 2014  
Questions: 1 2 3 4   Main
General Comments
Weakness/Remedies
Strength


























Question 1

Question 1

  1. (a)      Draw a thermosyphon type of cooling system and label  any five
  2.  Components in the sketch.
                                 (b)     (i)      State two advantages of a thermosyphon cooling system.
                                          (ii)      State two disadvantages of a thermosyphon cooling system.
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OBSERVATION

Comment
The performance of the candidates in this question was poor.  They could not draw and label the components of a thermosyphon type of cooling system.  The other parts were not well attempted by the candidates too.  The required the answers were as follows
                    (i)      Advantages of thermo-syphon cooling system

  • Fewer components.
  • No thermostat is needed as the engine temperature is determined by the rate of water circulation.
  • The system depends on natural circulation etc.

 

  • Disadvantages of thermo-syphon cooling system

-        Bulky radiator
-        Slow in operation due to conversion current
-        Large quantity of water needed etc.

 

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