When inspecting engine compartment belts during the vehicle inspection test:

When checking the engine compartment during the vehicle inspection test, you must check the power steering, water pump, alternator, and air compressor belts. In addition to cracks and frays, you should check the belts for snugness, allowing up to three-quarters of an inch of play at the center of each belt. If any of these items are not belt-driven, you must identify them and ensure that their components are operating properly, are not damaged or leaking, and are mounted securely.
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