On the marine gas turbine engine shown in the illustration, the 8th stage bleed air is used for which of the following? Illustration GT-0017

Correct Answer: Option B — Lube oil sump pressurization and cooling.

Bleed air extracted from the 8th stage of the compressor is utilized for sump pressurization and cooling. This high-pressure air ensures that the bearing sumps remain properly sealed against oil leakage and provides necessary cooling to the bearing components, which is vital for maintaining the longevity of the turbine's rotating assembly.