Workplace Fire Safety Certification Exam [fire-safety]

In a standard wet-pipe automatic sprinkler system, individual sprinkler heads activate when:

The fire alarm control panel sends an electrical signal to all heads simultaneously A heat-sensitive element (glass bulb or fusible link) at that specific head reaches its rated temperature The smoke detector nearest to the fire triggers the zone valve to open A firefighter manually opens the system's main control valve

Correct Answer:

A heat-sensitive element (glass bulb or fusible link) at that specific head reaches its rated temperature

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