What should be checked during a pre-operation inspection for heavy equipment?

During a pre-operation inspection for heavy equipment, it is vital to check fluid levels, brakes, and operational controls because these elements ensure the equipment operates safely and efficiently. Fluid levels, including oil, coolant, and hydraulic fluid, must be adequate to prevent damage and ensure the machinery operates properly. Checking the brakes is crucial for safety as they are integral to stopping and controlling the equipment under various conditions. Operational controls should also be examined to ensure that they function correctly, providing the operator with full control and responsiveness during operation.

The other choices do not provide a comprehensive overview of essential checks. Focusing solely on tires, fuel level, or painted markings neglects critical systems that might impact the performance and safety of the equipment. Therefore, option B encompasses a well-rounded inspection that is necessary before operating heavy machinery.