Question 94General Subjects - QMED70% to pass
A ball bearing will overheat if _______________.
AI Explanation
The correct answer is C) completely packed full of grease.
A ball bearing will overheat if it is completely packed full of grease, as this prevents proper lubrication and heat dissipation within the bearing. When a bearing is overfilled with grease, the excess grease cannot circulate and remove heat effectively, leading to increased friction and temperature rise within the bearing. The other options, such as filling the bearing to 65% capacity or operating at high speeds, do not necessarily lead to overheating on their own.
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