FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

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What are three methods of anti icing aircraft windshields?

Chemical coatings and UV light
Electric heating element, heated air, windshield wipers and anti icing fluid
Sonic waves and thermal blankets
Electromagnetic fields and inert gases

The correct answer is: Electric heating element, heated air, windshield wipers and anti icing fluid

Heated air and windshield wipers are common methods for aircraft windshields because they are efficient and reliable. Chemical coatings and UV light are not commonly used because they are not as effective at quickly removing ice from the windshield. Sonic waves and thermal blankets are also not commonly used because they are not practical methods for quickly removing ice from the windshield during flight. Electromagnetic fields and inert gases are not commonly used because they are not efficient and have not been proven to effectively remove ice from the windshield. Therefore, B is the most practical and effective answer for three methods of anti-icing aircraft windshields.