Life Safety & Emergency Systems Flashcards
7 cards from real CFI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Life Safety & Emergency Systems flashcards as text
According to NFPA 72, a single-station smoke alarm installed in a dwelling must sound at a minimum sound pressure level of how many decibels at 10 feet?
Answer: 75 dB
NFPA 72 requires single-station smoke alarms to produce a minimum alarm sound of 75 dB measured at 10 feet from the device.
A fire alarm control unit (FACU) that uses individual circuit monitoring for each device is classified as which type of system?
Answer: Addressable
An addressable fire alarm system identifies each device individually on the circuit, enabling the FACU to pinpoint the exact location of the alarm.
What is the purpose of a pre-action sprinkler system in a data center or library with rare books?
Answer: To prevent accidental water discharge from a single failure
A pre-action system requires two independent triggers before water enters the piping, preventing accidental discharge that could damage sensitive contents.
Under NFPA 25, wet pipe sprinkler systems must be inspected for main drain flow test results at what minimum frequency?
Answer: Annually
NFPA 25 requires the main drain test of a wet pipe sprinkler system to be conducted at least annually to verify adequate water supply.
Which component of a fire alarm system is specifically designed to reduce nuisance alarms caused by cooking or steam in residential kitchens?
Answer: Heat detector
Heat detectors respond only to elevated temperature rather than combustion particles or steam, making them appropriate in kitchens to avoid nuisance alarms.
In an emergency voice/alarm communication system (EVACS), the intelligibility requirement for speaker coverage is measured in which unit?
Answer: Common Intelligibility Scale (CIS)
NFPA 72 uses the Common Intelligibility Scale (CIS) to measure and verify that voice messages are clearly understood in emergency communication systems.
Which type of standpipe system supplies water automatically when a hose valve is opened and is intended for trained fire department use only?
Answer: Class I
A Class I standpipe provides 2½-inch hose connections for trained fire department personnel and supplies water when the valve is opened.