If the pilot selects the HI position of the windshield heat switch, additional heat will be applied to all four aircraft cockpit windows.

• A. TRUE
• B. FALSE. Only the windshields are heated at the higher level.
• C. FALSE. All cockpit windows are heated equally
• D. It depends on ambient temperature

Answer: (B)

Windshield heating is controlled by a dedicated switch that regulates the heating elements in the windshields. When you select the HI position, the higher heat level is applied to the windshield heating circuits only, to prevent icing or fogging on the windshields. The side cockpit windows are not driven by that same setting, so they do not receive the increased heat. Therefore, the idea that all four cockpit windows would be heated at the higher level isn’t correct. The HI setting affects the windshields specifically, not every window. Ambient temperature doesn’t change which windows receive the high heat; it’s determined by the switch setting and the window’s heating circuit design.