Which of the following statements, concerning the cleaning maintenance of a brushless generator, is correct?

Correct Answer: Option D — Cleaning of windings should be performed on a conditional basis using a vacuum or using a clean, dry, lint-free rag.

Per IEEE 45 and marine generator maintenance standards, clean windings conditionally using a vacuum or a clean, dry, lint-free rag to avoid driving moisture or debris deeper into the insulation matrix.