Which of the following is also a component of the worm gear assembly?

• A. Piston ring
• B. Camshaft
• C. Taper bore sprocket & bushing
• D. Valve stem

Answer: (C)

In a worm gear system, you need mounting and alignment parts to connect the gear train to the rest of the drive. A taper bore sprocket with a bushing fits this role well because the taper bore allows a precise, snug fit on a shaft, and the bushing reduces wear while spacing and aligning the sprocket correctly. This keeps the worm gear mesh accurate and the drive smooth. The other items—piston ring, camshaft, and valve stem—are components of an engine’s cylinder, timing, and valve assembly, not of a worm gear setup. So the taper bore sprocket & bushing is the part that also belongs to the worm gear assembly.