🔍 Key Concepts

• Rotor-to-stator air gap and what physically determines that spacing • How bearing wear or movement affects rotor position inside a machine • Which component is directly supporting and centering the generator rotor shaft

💭 Think About

• Ask yourself: what mechanical part actually holds the rotor in the correct position relative to the stator so the air gap stays uniform? • If that air gap has changed since the last reading, what kind of wear or damage would let the rotor shift closer to or farther from the stator? • Which option deals with the supports of the rotating shaft of the generator itself, rather than external drivers or electrical parts?

✅ Before You Answer

• Identify which choice deals with mechanical support of the generator rotor, not electrical condition • Eliminate options that only affect insulation or cleanliness, which don’t physically move the rotor • Focus on the component whose wear would change rotor alignment/centering and therefore change the air gap