Final answer:
The answer to the question about the root opening specified by a welding symbol cannot be accurately provided without examining the actual symbol, which visually shows the required dimensions including root openings.
Step-by-step explanation:
Without the visual reference of the mentioned welding symbol, it's not possible to provide a correct answer to the question: What root opening does the welding symbol specify? Welding symbols contain specific geometric information dictating the size and shape of the weld, including the root opening, which is the separation between the parts to be welded. To provide a correct answer, the actual welding symbol would need to be examined, as the dimensions for the root opening would be indicated on the symbol. The answer to the question about the root opening specified by a welding symbol cannot be accurately provided without examining the actual symbol, which visually shows the required dimensions including root openings.