Basic Flashcards

What is the minimum required flow rate in gallons per minute (gpm) for a residential sprinkler head under NFPA 13D?

Answer: 13 gpm

NFPA 13D requires a minimum flow of 13 gpm per sprinkler head for residential applications to control fires in one- and two-family dwellings.

Which extinguishing agent is most appropriate for suppressing a three-dimensional flowing fuel fire?

Answer: Aqueous Film-Forming Foam (AFFF)

AFFF forms a film over flammable liquid surfaces and is highly effective at suppressing three-dimensional flammable liquid fires.

A fire door assembly is rated primarily to resist which fire characteristic?

Answer: Heat and flame passage for a specified time period

Fire door assemblies are tested and rated to resist the passage of heat and flame for a specified duration, maintaining compartmentalization.

The 'water supply available pressure' for sprinkler system design is typically determined by which method?

Answer: A fire flow test at a nearby hydrant

A hydrant flow test measures static pressure, residual pressure, and flow rate to establish the actual available water supply for sprinkler design.

Under NFPA 72, what is the maximum allowable spacing for smoke detectors installed on smooth flat ceilings?

Answer: 30 feet

NFPA 72 specifies a maximum 30-foot spacing between smoke detectors on smooth, flat ceilings under standard conditions.

The concept of 'life safety' in fire protection primarily addresses:

Answer: Evacuation and protection of building occupants from fire effects

Life safety focuses on providing occupants adequate time and means to evacuate or shelter in place to avoid injury or death from fire.

Which property of a liquid fuel determines whether it can sustain a flammable vapor above its surface at ambient temperature?

Answer: Flash point

Flash point is the minimum temperature at which a liquid produces sufficient vapor to form an ignitable mixture near its surface.