Following the failure of one turbocharger on...

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Question 1 of 205eccefa2bacbc34ba4d47b05

Following the failure of one turbocharger on a large, crosshead, main propulsion diesel engine, fitted with multiple turbochargers, which of the following actions should be taken prior to further operation of the engine?

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🔍 Key Concepts

• Large crosshead diesel engines often have multiple turbochargers sharing exhaust gas flow and intake air supply. • Consider what happens inside a failed turbocharger if air, exhaust gas, oil, and cooling water are still allowed to flow through it. • Think about both safety (fire, overspeed, damage) and continued operation of the remaining turbochargers and engine.

💭 Think About

• If a turbocharger has failed, what could happen to its rotor if it is left free to turn while damaged and still exposed to exhaust gas flow? • What risks arise if lubricating oil and cooling water keep flowing through a damaged casing, especially if there is hot exhaust gas nearby? • How could continued exhaust gas flow through the failed unit affect engine performance, back pressure, and the remaining turbochargers?

✅ Before You Answer

• For each option, ask: does this action reduce the risk of further mechanical damage or fire in the failed turbocharger? • For each option, ask: does this action help protect the engine and the remaining turbochargers from abnormal exhaust flow or loss of air? • Consider whether more than one of these actions would logically be done together as part of an isolation and securing procedure for a failed turbocharger.

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