Which resource contains a Taper Chart and necessary formulas for measuring taper?

The correct choice is that the Machinery Handbook contains a Taper Chart and the necessary formulas for measuring taper. The Machinery Handbook is a comprehensive reference that provides essential information for various engineering and machining practices, including detailed charts, formulas, and guidelines for different types of machining operations.

Taper measurements are critical for ensuring that parts fit together correctly, especially in applications where precision is necessary, such as in the manufacturing of shafts or holes that must accommodate tapered fittings. The Taper Chart found in the Machinery Handbook helps machinists quickly reference standard taper measurements and apply them accurately during their work.

While the other resources mentioned may contain valuable information related to their specific topics—such as tooling, welding practices, or mathematical principles—they do not specifically focus on tapers in the same way that the Machinery Handbook does. Hence, the Machinery Handbook stands out as the vital resource for this particular need.