Question 341Electricity & Electronics - Assistant Engineer

The correct answer is B) Petroleum jelly. Petroleum jelly, also known as Vaseline, is commonly used to coat battery terminals to help prevent corrosion. It forms a protective barrier that seals the terminals and prevents the buildup of corrosive deposits. This helps extend the life of the battery and maintain a good connection. The other options are incorrect: Zinc chromate is a primer used for corrosion protection on metal surfaces, not specifically for batteries. Lead hydroxide and lead peroxide are chemical compounds found in lead-acid batteries, but they do not have the same protective properties as petroleum jelly for preventing terminal corrosion.