Question 30General Subjects - Assistant Engineer

The correct answer is D) replace all of the belts. When one drive belt on an air compressor is found to be worn, it is generally recommended to replace all of the belts, rather than just the worn one. This is because the belts are designed to work together as a set, and replacing only one belt can lead to uneven wear and potential issues with the compressor's operation. Additionally, if one belt is worn, it is likely that the other belts are also nearing the end of their useful life, so replacing them all at the same time is a proactive measure to ensure the continued reliable operation of the air compressor. The other options (A, B, and C) are not recommended, as they do not address the underlying issue of the worn belt and could lead to further problems with the air compressor.