Protection Systems Flashcards
7 cards from real Firefighter practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Protection Systems flashcards as text
Which sprinkler system uses pipes filled with pressurized air and a dry-pipe valve to prevent freezing?
Answer: Dry-pipe system
A dry-pipe system keeps pressurized air in the pipes until a head opens, releasing water, which protects unheated spaces from freezing.
A fusible-link sprinkler head activates when the link does what?
Answer: Melts at a rated temperature
Fusible-link heads contain a solder link that melts at a set temperature, opening the head to release water.
What color of sprinkler head glass bulb indicates an ordinary temperature rating (135-170°F)?
Answer: Orange or red
Orange (135°F) and red (155-170°F) bulbs indicate ordinary temperature ratings.
A deluge system is BEST suited for which hazard?
Answer: A high-hazard area needing rapid total water application
Deluge systems have open heads and flood an entire area at once, ideal for high-hazard occupancies like aircraft hangars.
What device on a sprinkler system signals the alarm when water begins to flow?
Answer: Water flow switch
A water flow switch (vane or pressure type) detects flow and activates the alarm.
A preaction system requires which two events before water is discharged?
Answer: A detector activation and a sprinkler head opening
Preaction systems require both a detection device to trip the valve and a head to open, preventing accidental water damage.
Why should firefighters avoid shutting down a sprinkler system too early during overhaul?
Answer: Hidden or rekindling fire may flare up without protection
Premature shutdown removes fire protection while hidden fire may still be active, risking rekindle.