Turbocharged engines require what duration of cooldown before shutdown?

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Multiple Choice

Turbocharged engines require what duration of cooldown before shutdown?

Explanation:
Turbocharged engines generate a lot of heat in the turbocharger during heavy use. If you shut the engine off immediately, the turbo still runs hot while oil pressure drops, which can lead to oil coking and bearing wear. Letting the engine idle for a short cooldown period keeps oil flowing to the turbo and allows temperatures to drop gradually, protecting the bearings and seals and extending turbo life. In typical fire service practice, this brief idle cooldown before shutdown is recommended to prevent damage from heat soak.

Turbocharged engines generate a lot of heat in the turbocharger during heavy use. If you shut the engine off immediately, the turbo still runs hot while oil pressure drops, which can lead to oil coking and bearing wear. Letting the engine idle for a short cooldown period keeps oil flowing to the turbo and allows temperatures to drop gradually, protecting the bearings and seals and extending turbo life. In typical fire service practice, this brief idle cooldown before shutdown is recommended to prevent damage from heat soak.

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