🔍 Key Concepts

• Meaning of a turbine bearing clearance diagram • Difference between cold (assembly) clearances and hot (operating) clearances • Purpose of thrust clearance limits in relation to safe turbine operation

💭 Think About

• Ask yourself: Is the diagram meant to show how it was built originally, how it normally runs, or the limits you must not go beyond? • Think about when engineers actually MEASURE thrust clearances on watch—are they checking against building data, routine values, or safety limits? • Consider what information on that diagram would trigger maintenance or shutdown if the readings approach a certain value.

✅ Before You Answer

• Distinguish between initial (as-built) settings and in-service limits • Decide whether the diagram would more likely show a target value or a do‑not‑exceed / renewal limit • Think about which option best reflects a value used to judge continued safe operation of the thrust bearing