FAA Aircraft Dispatcher Practice Exam

What type of de-ice/anti-ice systems does the Boeing 727 utilize?

1. Electrical and thermal systems

2. Hot air and chemical systems

3. Boots and anti-icing fluids

4. Pneumatic and thermal systems

The correct answer is: Boots and anti-icing fluids

The Boeing 727 utilizes boots and anti-icing fluids as part of its de-ice and anti-ice systems. The inflatable rubber “boots” on the wings and tail are designed to remove ice accumulation. When ice forms on the surfaces, the boots can be inflated to break the ice free, allowing it to fall off. This method is known as pneumatic de-icing. In addition to the boots, anti-icing fluids are used to prevent ice from forming in the first place. These fluids provide a protective layer on the aircraft surfaces, ensuring that ice does not accumulate during flight. The combination of these two systems makes the 727 particularly effective in managing ice during flight operations. Understanding the specifics of the 727's de-ice/anti-ice systems is important for safety and operational efficiency, as icing can severely affect aircraft performance. The other choices mention different types of systems, which are not applicable to the Boeing 727's design.