Fire Suppression Systems Flashcards
7 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 7 Fire Suppression Systems flashcards as text
A Class II standpipe system provides 1.5-inch hose stations intended for use by which group?
Answer: Building occupants for initial fire attack
Class II standpipe systems are designed for use by building occupants to attempt initial fire suppression before the fire department arrives, using pre-connected 1.5-inch hose lines.
What is the purpose of an inspector's test connection on a wet pipe sprinkler system?
Answer: To simulate one sprinkler head flow and verify alarm activation
The inspector's test connection simulates the flow equivalent to one sprinkler head opening, allowing verification that water flow alarms (flow switches or water motor gongs) activate properly.
Which type of fire suppression system is most appropriate for a computer server room to prevent damage to equipment?
Answer: Clean agent (gaseous) suppression system
Clean agent systems use inert gases or chemical agents that suppress fire without leaving water or corrosive residue, making them ideal for protecting sensitive electronic equipment.
During a sprinkler inspection, an FLSD discovers a sprinkler head that has been painted over. What is the correct action?
Answer: Have the painted sprinkler head replaced immediately
Painted sprinkler heads must be replaced immediately because paint can clog the fusible element or deflector, preventing proper thermal activation and correct water distribution.
What is 'water hammer' in the context of fire suppression systems?
Answer: A sudden pressure surge that can damage pipes when water flow changes abruptly
Water hammer is a hydraulic shock wave caused by rapid changes in water velocity, which can damage sprinkler pipes, fittings, and control valves if flow is started or stopped too abruptly.
Per NFPA 13, what is the minimum required water supply duration for a sprinkler system in most commercial hazard occupancies?
Answer: 60 minutes
NFPA 13 generally requires a water supply capable of sustaining sprinkler system demand for a minimum of 60 minutes in ordinary and extra hazard commercial occupancies.
After a sprinkler head activates and discharges water, what must occur before the system can be returned to normal service?
Answer: Replace the activated head with an identical replacement and refill and test the system
Once a sprinkler head activates, its fusible element is destroyed and cannot be reused; it must be replaced with an identical head, and the system must be refilled, tested, and inspected before returning to service.