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Q8. (a) Explain why turbochargers are fitted to some diesel engines and describe how they efficiently achieve that aim. (6)

(b) Describe, with the aid of a sketch, a turbocharger installation showing the paths of engine exhaust gas, charge air and cooling water. State the monitoring systems provided for the system, explaining why they are fitted, how they operate and how their functioning is checked. Explain how turbochargers can be cleaned without dismantling. (10)