waecE-LEARNING
Auto Mechanics Paper 2,May/June 2011  
Questions:   1 2 3 4 5   Main
General Comments
Weakness/Remedies
Strength






























Question 4
(a) (i)   Sketch a gravity-feed fuel supply system.
    (ii) Label any three parts.
(b)        Explain the operation of the gravity-feed fuel supply system.
(c)        State three reasons why the gravity-feed fuel supply system is not used on motor vehicles.
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OBSERVATION

Most of the candidates who attempted this question could not give the responses to parts (a) and (c). Those who attempted to draw the diagram placed the tank at the same level with the carburettor. The correct labeled diagram is shown below

Part (c) of the question required the candidates to state why the gravity-feed fuel supply system is not used on motor vehicles. The required responses are;

-less amount of fuel is carried in the tank because of its position in the engine block head;
- high bonnet;
- any leakage would allow fuel to drip into the driverís compartment/engine which could cause fire outbreak;
- the system is slow in operation

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