Excessive mechanical and pulsating vibrations developed in a main propulsion diesel engine may be more likely to cause damage to an attached __________.

Correct Answer: Option D — gas driven turbocharger because it has a wide speed range, high operating temperatures and close tolerances.

Exhaust turbochargers operate at extreme rotational speeds and elevated temperatures with extremely tight rotor-to-housing clearances. Severe engine vibrations can easily induce rotor unbalance, shaft deflection, and catastrophic contact between blades and casings.