FAA AMT Airframe Practice Exam 2026 – Complete Exam Prep Guide

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What controls the inflation sequence in a pneumatic deicer boot system?

Autotransformer.

Distributor valve.

In a pneumatic deicer boot system, the inflation sequence is controlled by the distributor valve. The distributor valve is responsible for directing air pressure to the different sections of the deicer boots in a specific sequence to ensure that ice is effectively shed from the aircraft's surfaces. Autotransformer, heat control toggle switch, and suction relief valve are not involved in controlling the inflation sequence in a pneumatic deicer boot system.

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Heat control toggle switch.

Suction relief valve.

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