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Q9. Explain the possible causes and actions to be taken in the event of a high exhaust temperature on a 4-stroke generator engine at:

(i) A single cylinder (3)                            (ii) More than one cylinder (3)

Explain why multiple air inlet and exhaust valves are fitted to highly rated 4-stroke engines (4)

Describe an arrangement for operating multiple valves from a single cam, explaining how the tappet clearance is set for both valves. (6)