On a GE LM2500 gas turbine powered vessel...

On a GE LM2500 gas turbine powered vessel...

Question 1 of 270705eccef9fbacbc34ba4d46bd3

On a GE LM2500 gas turbine powered vessel you are conducting a borescope inspection of the compressor. What is used on each compressor stage as a reference for indexing the blades?

Question 1 of 27070

Q

On a GE LM2500 gas turbine powered vessel you are conducting a borescope inspection of the compressor. What is used on each compressor stage as a reference for indexing the blades?

🔍 Key Concepts

• GE LM2500 compressor construction and staging • How borescope inspections are indexed to ensure all blades are viewed • Physical reference features used for alignment on rotating machinery

💭 Think About

• Think about which feature would repeat consistently at each stage to help you track blade position during the inspection. • Ask yourself which option is most likely to be a deliberate manufacturer-provided reference, rather than just a general component of the turbine. • Consider what would allow you to return to the same blade position if the rotor is moved and then brought back.

✅ Before You Answer

• Which option is physically present and usable on every compressor stage as a repeatable reference? • Which feature is specifically intended for indexing or alignment, not just normal operation or actuation? • Which choice would remain visible and meaningful through a borescope port during a stage-by-stage inspection?