Which two types of engine fire detection systems are the most common?

The most common types of engine fire detection systems are Spot Detectors and Continuous Loop systems. Spot Detectors are designed to monitor specific areas for indications of fire, such as heat or smoke, using sensors placed in critical locations. These detectors often trigger alarms when fire indicators are detected. Continuous Loop systems, on the other hand, feature a sensing element that runs continuously around critical engine areas. These systems can detect temperature changes throughout the loop, providing a more comprehensive coverage area.

The choice of these systems is driven by their effectiveness in quickly identifying potential fire hazards. Spot Detectors allow for targeted monitoring, while Continuous Loop systems can cover larger areas and detect fires across a wider range, making them essential for the safety and operational reliability of engines in power plants. Other options presented do not reflect the primary technologies used in fire detection for engines, making them less relevant in this context.