How does the pitot heat system receive its power for operation?

How does the pitot heat system receive its power for operation?

• A. From the generator
• B. From the battery
• C. From the 28 VDC bus
• D. From the cockpit controls

Answer: (C)

The pitot heat system receives its power from the 28 VDC bus. This system is designed to ensure that the pitot tube, which measures airspeed, remains free of ice and moisture that can affect its readings. The 28 VDC bus supplies steady electrical power necessary for the heating elements in the pitot system to function effectively, especially during flight conditions that could lead to ice formation. Using the 28 VDC bus for this purpose allows for reliable operation, as it is a standard power source for various electrical systems in the aircraft, facilitating consistency in the design and function of vital systems like pitot heat. Other power sources, such as the generator and battery, serve different functions or might not be directly connected to specific heating elements, making the 28 VDC bus the appropriate source for this application. The cockpit controls are used to activate or deactivate the system rather than providing direct power, reinforcing the importance of the dedicated electrical bus for operational functionality.

The pitot heat system receives its power from the 28 VDC bus. This system is designed to ensure that the pitot tube, which measures airspeed, remains free of ice and moisture that can affect its readings. The 28 VDC bus supplies steady electrical power necessary for the heating elements in the pitot system to function effectively, especially during flight conditions that could lead to ice formation.

Using the 28 VDC bus for this purpose allows for reliable operation, as it is a standard power source for various electrical systems in the aircraft, facilitating consistency in the design and function of vital systems like pitot heat. Other power sources, such as the generator and battery, serve different functions or might not be directly connected to specific heating elements, making the 28 VDC bus the appropriate source for this application. The cockpit controls are used to activate or deactivate the system rather than providing direct power, reinforcing the importance of the dedicated electrical bus for operational functionality.