Commercial Pilot License (CPL) Practice Exam

The primary function of static dischargers on an aircraft is to reduce radio interference caused by static electricity. When an aircraft flies, it interacts with the atmosphere, which can generate static electricity. This buildup of static can result in radio interference, affecting communication and navigation systems.

Static dischargers are small devices typically mounted on the trailing edges of the wings and tail of the aircraft. They provide a path for this static electricity to dissipate safely into the atmosphere. By allowing the static charge to bleed off, static dischargers help maintain clearer radio signals, enhancing the reliability of communication and navigation equipment on board. This is particularly crucial for maintaining safe flight operations, as effective communication with air traffic control and other aircraft is vital.

The other options relate to functions that static dischargers do not perform. While aerodynamic efficiency, cabin pressure monitoring, and engine performance are important aspects of aircraft operation, they are not the purpose of static dischargers. Understanding the role of static dischargers highlights their importance in ensuring clear communication and preserving the integrity of the aircraft's electronic systems.