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.

Gas-driven turbochargers operate at extreme rotational speeds exceeding 20,000 RPM with microscopic clearances between turbine wheels, compressor impellers, and casings. Severe crankshaft torsional or pulsating vibrations transmit destructive shockwaves through exhaust ducting, easily damaging these high-stress, precision components.