Fire Alarm Systems Flashcards
7 cards from real FST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Fire Alarm Systems flashcards as text
A projected beam smoke detector is best suited for which type of environment?
Answer: Large open spaces such as atriums and warehouses
Projected beam smoke detectors use an infrared beam across large open areas, making them ideal for spaces where ceiling-mounted point detectors would be impractical.
When a fire alarm control panel is placed in 'alarm silence' mode, which of the following continues to operate?
Answer: Strobe notification appliances
Alarm silence stops audible devices but strobe lights and other visible notification appliances typically continue to operate until the system is fully reset.
Which factor is MOST critical when determining the placement of manual pull stations?
Answer: Location at exits and paths of egress
Manual pull stations must be placed at exits and along paths of egress so occupants can activate them while evacuating the building.
What does NFPA 72 specify as the mounting height range for manual pull stations?
Answer: 42 to 48 inches above finished floor
NFPA 72 requires manual pull stations to be mounted with the operable part between 42 and 48 inches above the finished floor for accessibility.
A fire alarm system using a digital alarm communicator transmitter (DACT) must be connected to how many separate telephone lines?
Answer: Two separate phone lines
NFPA 72 requires a DACT to be connected to two separate telephone lines so that if one line is busy or fails, the second provides a backup communication path.
Which detector type uses two sensing elements — one exposed to the environment and one sealed — to compensate for slow ambient temperature changes?
Answer: Compensating heat detector
A compensating (or combination fixed-temperature/rate-of-rise) heat detector uses a vented outer chamber and a sealed reference chamber to distinguish rapid heat rise from gradual ambient changes.
Under NFPA 72, when must a fire alarm system record be retained and made available for inspection?
Answer: For the previous 3 inspection cycles
NFPA 72 requires records of inspections, tests, and maintenance to be retained for the period of the current contract and the previous two inspection cycles (three total).