Which method is used to assess rotor balance?

Which method is used to assess rotor balance?

• A. Use vibration analysis
• B. Visual inspection only
• C. Replace bearings
• D. Measure oil level

Answer: (A)

Imbalance in a rotor makes the shaft vibrate when it spins, so you assess rotor balance by measuring those vibrations. Vibration analysis uses sensors to capture how big the vibrations are and what frequencies appear as the rotor runs. That information tells you how severe the imbalance is and roughly where it’s located, guiding corrective steps like adding or removing weight to achieve balance. Visual inspection can miss hidden, dynamic imbalances and won’t quantify them. Replacing bearings or measuring oil level doesn’t address or reveal balance issues, so they’re not methods for assessing rotor balance.

Imbalance in a rotor makes the shaft vibrate when it spins, so you assess rotor balance by measuring those vibrations. Vibration analysis uses sensors to capture how big the vibrations are and what frequencies appear as the rotor runs. That information tells you how severe the imbalance is and roughly where it’s located, guiding corrective steps like adding or removing weight to achieve balance. Visual inspection can miss hidden, dynamic imbalances and won’t quantify them. Replacing bearings or measuring oil level doesn’t address or reveal balance issues, so they’re not methods for assessing rotor balance.