Insulators are cleaned using high-pressure water, corn cob, and nutshell blasting to mechanically __________ from the insulators.

• A. Remove grime
• B. Remove the finish
• C. Remove insulation
• D. Remove gaps

Answer: (A)

Cleaning insulators with blasting media is about removing surface grime that builds up on the insulator. The high-pressure water and abrasive media like corn cob and nutshells provide a controlled mechanical action that dislodges dirt, oil, dust, and other contaminants from the surface, restoring a clean, smooth area for proper insulation. Removing grime reduces moisture retention and potential leakage paths, helping maintain the insulator’s dielectric performance. The other options describe removing things you don’t intend to strip during cleaning—like coatings (the finish), insulation itself, or gaps—which isn’t the purpose of this cleaning method.