FAA Powerplant Written Practice Test

What type of fireproof connector is used in critical areas where electric current must not be interrupted, even if exposed to continuous open flame?

1. Class M connector

2. Class K connector

3. Class N connector

4. Class J connector

The correct answer is: Class K connector

The Class K connector is specifically designed for use in critical areas where the integrity of the electrical connection is paramount, even in the presence of extreme heat or fire conditions. These connectors are built to withstand continuous exposure to flame and maintain electric current without interruption. This is crucial for systems that must remain operational under demanding conditions, such as in aircraft powerplants where reliability is essential for safety and performance. Class K connectors are constructed with materials that have high heat resistance and provide excellent sealing capabilities to protect against the potential ingress of moisture and contaminants. By ensuring that the electrical connection remains intact even during a fire, Class K connectors play a vital role in the safety and operational reliability of the aircraft's electrical systems.