Why is proper lubrication essential for bearings in mechanical drives and what are common lubricants?

• A. Lubrication reduces wear, carries away contaminants, and cools; common lubricants are mineral oil-based or synthetic; grease for sealed bearings, oil for open bearings.
• B. Lubrication is optional and has no effect on life.
• C. Water is the preferred lubricant.
• D. Lubrication increases wear and heat.

Answer: (A)