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Q3. a) Describe the purpose and function of an air start distributor in a marine diesel engine. Why is it critical for engine starting operations? (6)

b) Explain how the air start distributor works, including its role in timing the supply of compressed air to the engine cylinders. Discuss how it ensures the correct firing order and timing during the start-up sequence. (5)

c) Describe how the cam profile and rotation are designed to ensure proper firing order and timing in the air start distributor. (5)