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- Assistant Engineer (Steam-Motor-Gas Turbine Plants (Limited)) »
- Q615 - Electrical, Electronic, & Control Engineering
117. Concerning the illustrated fire detection and alarm system, when the system is operating normally and under supervision, what is the status of the ground detector and the fire alarm relays
During normal, supervised operation, the fire alarm relay is energized by the intact detection circuits, while the ground detector relay remains de-energized until a ground fault is detected.
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