What type of wood should be used when splicing plywood webs?

The correct answer is that the same type of plywood as originally used should be utilized when splicing plywood webs. This approach ensures consistency in the mechanical properties, strength, and structural integrity of the repaired area. Plywood is made from layers of wood veneer that are glued together, and each type of plywood has unique characteristics related to the grain, grain direction, and bonding materials.

Using the same type of plywood ensures that the splice can withstand the same loads and stresses as the original material, maintaining the overall performance of the structure. It's crucial to avoid variations in material properties that can arise from mixing different wood types, which could lead to weak points in the splice and compromise safety and functionality.

Other choices suggest using any wood type or restricting it to softwood or hardwood only which would not guarantee the same structural properties or compatibility. Thus, adherence to the original plywood type is essential for successful splicing in order to maintain the design and engineering standards intended in the aircraft's construction.