🔍 Key Concepts

• Read the table of principal clearances carefully, focusing on the line for i1, i2 and the note about their maximum difference. • Relate the measured values i1 = 4 mm and i2 = 1 mm to both the normal play and the maximum (worn) play shown in the table. • Connect the calculated wear rate per year with whether it exceeds or stays within the maker’s stated maximum play (worn) limits.

💭 Think About

• How does the measured total clearance and the difference between i1 and i2 compare with the values in the table and the note near view B? • If the bearing has run ahead for eight years, what average wear per year does the total change from the original specification represent? • Looking at the answer choices, which ones match a condition where dimensions are still within limits but are approaching them, versus clearly beyond limits or clearly like-new?

✅ Before You Answer

• Verify from the table what the normal play and max. play (worn) values are for i1 + i2. • Check the note in view B that states the maximum permitted difference between i1 and i2 when the bearing bolts are taken up. • Confirm that any calculated wear rate is based on the change from the normal value to the measured value, divided by 8 years of ahead running time.