Motor Troubleshooting — real-world interview & field troubleshooting questions with clear, practical answers. Tap any question to open its answer. Showing the first 70 questions free. The complete question bank is available as a PDF below. Motor Starting Faults Q1 The motor does not start when the START command is given. What should you check first? Answer Verify the incoming supply, starter/contactor operation, control circuit, overload relay, motor terminals, and start command. Check where the voltage path stops instead of replacing the motor immediately. Q2 The contactor pulls in, but the motor does not rotate. How would you troubleshoot it? Answer Measure voltage at the motor terminals while the contactor is energized. If supply is present, check motor winding continuity, phase loss, mechanical locking, and shaft condition. Q3 The motor starts only after pressing the START button several times. What could be wrong? Answer Check the push button contacts, control relay, cont...