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EK-Motor : 2022/MAR/06 – 2015/OCT/03

Question

Q6. With reference to engine fuel injector nozzle cooling;

(a) Explain why fuel injector nozzle cooling is necessary(4)

(b) Describe, with the aid of a sketch, the operation of a nozzle cooling system for a generator engine; (8)

(c) Explain how fuel injector nozzles are cooled on engines which are not fitted with a separate nozzle cooling system (4)

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