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.

IEEE 45 guidelines mandate that generator windings be cleaned conditionally rather than routinely, utilizing non-conductive vacuums or clean, dry, lint-free rags to prevent pushing abrasive carbon dust deeper into the insulation matrix.