What is the primary indication of a grease lubricated bearing that is over-lubricated in terms of the quantity of grease in the housing?

Correct Answer: Option D — The bearing temperature would tend to run hotter than normal for the load.

Over-lubricating a grease-packed bearing causes excessive internal friction as the rolling elements churn through the surplus grease. This churning generates significant heat, leading to elevated operating temperatures. Proper maintenance requires strictly following manufacturer volume specifications to ensure the bearing runs at its designed thermal equilibrium and avoids premature lubricant breakdown.