Fire Alarm Systems Flashcards
6 cards from real FLSD practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Fire Alarm Systems flashcards as text
A photoelectric smoke detector operates by:
Answer: Detecting light scattered by smoke particles entering a sensing chamber
Photoelectric detectors use a light beam and sensor; smoke particles scatter the light into the sensor, triggering the alarm — they are particularly effective at detecting slow-smoldering fires.
A fire alarm control panel in 'alarm silence' mode will:
Answer: Silence audible devices while maintaining visual notification and FDNY notification status
Alarm silence stops audible notification devices (bells, horns) but visual strobes and the transmitted signal to FDNY and central station remain active.
Under NYC Fire Code, the FLSD must ensure that fire alarm system annual testing is performed by:
Answer: A licensed fire alarm inspection and testing company (NYC DOB license required)
Annual fire alarm system testing in NYC must be performed by a company or individual holding the appropriate NYC Department of Buildings license for fire alarm inspection and testing.
A 'waterflow alarm' on a fire alarm panel indicates:
Answer: Water is flowing through the sprinkler system — a sprinkler head has likely activated
A waterflow alarm indicates that water is actually flowing through the sprinkler piping — typically because one or more sprinkler heads have activated due to heat from a fire.
The FLSD needs to test the fire alarm system's voice communication function. The proper procedure is to:
Answer: Coordinate with the central station to place the system in test mode, then test all intercom stations
Voice communication testing must be coordinated with the central station (to prevent FDNY dispatch), then conducted systematically to test all intercom stations, stairwell phones, and two-way communication devices.
Rate-of-rise heat detectors are designed to activate when:
Answer: The temperature rises faster than a predetermined rate (typically 12-15°F per minute)
Rate-of-rise detectors respond to rapid temperature increases (typically more than 12-15°F per minute), catching fast-developing fires before they reach the fixed temperature threshold.