What type of inspection is performed on rigging equipment at regular intervals?

The correct choice is periodic inspection because this type of inspection involves assessing rigging equipment at defined intervals, ensuring that it is functioning safely and efficiently according to established standards. Periodic inspections are critical for maintaining safety and reliability in rigging operations, as they help identify wear, damage, or any deterioration that may not be visible during routine checks.

Visual inspection, while important, is generally a more informal and immediate assessment rather than a scheduled and detailed examination. Operational inspection focuses on evaluating how equipment performs under load or during use, but it does not encompass the comprehensive review of the equipment's structural integrity or operational safety over time. Workload inspection is also specific to assessing the equipment under the loads it will bear rather than systematically checking the equipment for wear and compliance with safety standards. Regular periodic inspections are essential to prevent accidents and ensure that rigging equipment remains in good working order.