Practice question

Why is it dangerous to immediately shut down a heavy turbocharged diesel engine after prolonged heavy highway hauling?

  1. Turbocharger bearings continue spinning at extreme speeds (over 100,000 RPM) while glowing hot; cutting the engine stops oil pressure, causing oil coking and bearing destruction
  2. The fuel tank will explode
  3. The brakes will lock permanently
  4. The battery will short circuit

Answer: A — Turbocharger bearings continue spinning at extreme speeds (over 100,000 RPM) while glowing hot; cutting the engine stops oil pressure, causing oil coking and bearing destruction

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