FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

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Arcing in an electrically heated windshield panel usually indicates a breakdown in the?

  1. Insulating material

  2. Conductive coating

  3. External protective layer

  4. Internal wiring circuit

The correct answer is: Conductive coating

An electrically heated windshield panel uses a conductive coating to generate heat and clear away snow and ice. If arcing occurs, it typically means there is a breakdown or damage in the conductive coating, rather than the insulating material (A), external protective layer (C), or internal wiring circuit (D). Options A and D do play a role in the overall functionality of the windshield panel, but they are not directly responsible for the arcing. Option C would not affect the conductive coating and therefore would not cause arcing. Therefore, option B is the most correct answer.

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