FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

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Prepare for the FAA AMT Airframe Exam with our comprehensive quiz. This resource offers multiple-choice questions designed to enhance your knowledge and understanding of aviation maintenance concepts.

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What is a cause of generator brush arcing?

  1. High voltage

  2. Low spring tension

  3. Excessive humidity

  4. Improper installation

The correct answer is: Low spring tension

Generator brush arcing is caused by low spring tension. High voltage is not a cause of generator brush arcing, as it is the current that causes the arcing. Excessive humidity can result in corrosion of the brushes, but it is not a direct cause of arcing. Improper installation could potentially cause brush arcing, but it is not a common cause and typically indicates other issues with the generator. This could include low spring tension, worn brushes, or other factors.