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Question 5

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Power & Propulsion — Engine Room Test

This is a dark (usually black) conical device that attaches to the turbocharger intake. The engine rooms of most boats are generally pretty clean, so its main purpose is to reduce the roar of air being sucked into the turbocharger. It can also be part of a system that captures fumes and vapor that escape into the engine room.

Answer to Question 4: Aftercooler/intercooler