CFM Fire Suppression Systems & Equipment Flashcards

What minimum residual pressure must be maintained at the most hydraulically remote sprinkler head per NFPA 13 design standards?

Answer: 10 psi

NFPA 13 requires a minimum residual pressure of 7 psi at the most remote sprinkler head to ensure adequate water distribution.

A deluge sprinkler system differs from a standard wet pipe system in that it uses:

Answer: Open sprinkler heads that all discharge simultaneously when the deluge valve opens

Deluge systems have open (non-fusible) heads, so when the deluge valve is triggered by a detection system, all heads discharge water simultaneously over the entire protected area.

According to NFPA 25, how often must wet pipe sprinkler systems undergo a full internal inspection of system piping?

Answer: Every 10 years

NFPA 25 requires internal inspections of wet pipe sprinkler system piping at 5-year intervals to check for obstruction material, corrosion, and buildup.

What is the purpose of a tamper switch on a sprinkler system control valve?

Answer: To send an alarm signal if the valve is closed or moved from the open position

Tamper switches monitor the position of control valves and transmit a supervisory alarm to the fire alarm panel if a valve is moved toward the closed position.

Clean agent fire suppression systems (e.g., FM-200, Novec 1230) are preferred over CO2 in occupied spaces primarily because they:

Answer: Extinguish fires without depleting oxygen to dangerous levels

Clean agents suppress fires through heat absorption or chemical reaction rather than oxygen displacement, making them safe to use in normally occupied spaces.

Which test is required annually on a wet pipe sprinkler system per NFPA 25 to verify the system will operate under demand conditions?

Answer: Main drain test

The annual main drain test checks for water supply conditions and control valve operation by fully opening the main drain and measuring residual pressure.