A roller bearing has an interference fit with the shaft upon which it is being installed. What thermal method of mounting the bearing would be most appropriate?

Correct Answer: Option A — Heating the bearing in an oil-bath bearing heater.

Heating a bearing in an oil bath is the preferred method for thermal expansion during interference fit installation. This expands the inner race uniformly, allowing it to slide onto the shaft without mechanical force. Open flames or torches are prohibited as they cause localized overheating, damaging the bearing's metallurgical properties.