Elevator Mechanic Practice Exam 2025 - Free Elevator Mechanic Practice Questions and Study Guide

Question: 1 / 400

While testing for a locked rotor condition, what could happen if the testing is carried on for too long?

Damage to the control panel

Damage to the power supply

Damage to the stator or rotor

When testing for a locked rotor condition, extending the test duration can indeed lead to damage in the components of the motor, specifically to the stator or rotor. A locked rotor situation occurs when the rotor of the motor is unable to turn, which means that it is drawing a significant amount of current without the corresponding movement. This sustained high current can cause excessive heat to build up in the stator windings and the rotor itself.

The stator’s coils can overheat, resulting in insulation breakdown, while the rotor can also suffer from thermal stress, leading to potential deformation or failure. In the worst-case scenario, this can completely ruin the motor, necessitating costly repairs or replacements. It is therefore crucial for technicians to limit the duration of testing under these conditions to prevent damage.

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Overheating of the wires

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