FAA AMT Airframe Test 2026 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 1030

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

Insulating material

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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External protective layer

Internal wiring circuit

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