🔍 Key Concepts

• Manufacturer’s technical manual / MIM for the GE LM2500 and the specified turning gear socket size • Difference between wrench length and drive/extension size (1/2-inch vs 3/4-inch drive) • Safe positioning of the operator when barring/turning a large gas turbine by hand

💭 Think About

• Which part of the tool actually has to match the engine’s turning gear socket: the overall wrench length, or the drive size (1/2" vs 3/4")? • Why might using an extension between the wrench and the engine be preferred when manually rotating a large turbine? Think about clearance and safety. • Among the answer choices, which option gives you the correct drive size that mates with the LM2500’s turning gear while also allowing you to stand clear of the machinery?

✅ Before You Answer

• Verify in the GE LM2500 technical manual what drive size (1/2" or 3/4") is specified for the manual turning/barring point. • Check which options include an extension that would let you keep hands and body clear of rotating parts and hot surfaces. • Make sure you are choosing based on the drive size required by the engine’s turning gear, not just on the overall length of the wrench.