If the metal contacts in the bulb housing are corroded, they should be cleaned with what?

• A. Alcohol
• B. Pencil eraser
• C. Bleach
• D. Water

Answer: (B)

When electrical contacts are corroded, you want to remove the oxide buildup without introducing moisture or harsh chemicals that could damage the parts. A pencil eraser provides a dry, non-conductive, mildly abrasive surface that can physically scrub away oxidation from the contacts without leaving liquid residue. This helps restore a clean, metal surface for a solid electrical connection when the bulb is reinstalled.

Alcohol can clean oils but may not effectively remove oxide and can leave moisture behind; bleach is corrosive and can damage metal and plastics; water can promote corrosion or cause short circuits. After erasing, wipe away any debris and ensure the contacts look clean and shiny before reassembly.