🔍 Key Concepts

• How gear tooth contact patterns are visually checked after final assembly • Which tools are used for measuring movement or clearance versus marking contact surfaces • The purpose of a final contact check after the housing is bolted down

💭 Think About

• Which method would actually let you SEE the load/contact pattern between mating gear teeth? • Which tools in the options are mainly used for measuring alignment, runout, or distance rather than showing a contact pattern? • After the housing is bolted, can you still practically use large alignment tools inside, or do you rely on a surface-marking method?

✅ Before You Answer

• Identify which option involves applying a marking substance directly to the gear teeth to show contact pattern. • Eliminate any tools whose primary function is to measure deflection, runout, or spacing instead of surface contact. • Consider which method is commonly used by machinists and mechanics to verify correct bearing/contact area between two metal surfaces.