Elevator Mechanic Practice Exam

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Prepare for your Elevator Mechanic Exam with comprehensive quizzes, flashcards, and multiple-choice questions that cover all essential topics. Boost your knowledge and confidence as you get ready for your certification!

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What could cause the pump motor in a hydraulic elevator system to trip the circuit breaker?

  1. A short circuit in the motor windings

  2. Disconnected hoist cable

  3. Faulty door sensor

  4. Lack of lubrication

The correct answer is: A short circuit in the motor windings

The primary cause of a pump motor tripping the circuit breaker in a hydraulic elevator system is a short circuit in the motor windings. This means that there is an abnormal flow of electric current through the motor, causing it to overheat and trip the circuit breaker. This can be caused by old or damaged wiring, debris or moisture getting into the motor, or excessive wear and tear on the equipment. Options B, C, and D are incorrect because they do not directly affect the electric current flow within the motor and therefore would not cause it to trip the circuit breaker. A disconnected hoist cable would cause the elevator to not function properly, a faulty door sensor would affect the opening and closing of the elevator doors, and lack of lubrication could cause mechanical issues in the elevator system, but these would not cause the motor to overheat and trip the circuit breaker.

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