CFPS Basic 3 — Questions and Answers
Question 1: What is the minimum required flow rate in gallons per minute (gpm) for a residential sprinkler head under NFPA 13D?
- 7 gpm
- 13 gpm (Correct answer)
- 18 gpm
- 26 gpm
Correct 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.
Question 2: Which extinguishing agent is most appropriate for suppressing a three-dimensional flowing fuel fire?
- Water mist
- Dry chemical (ABC)
- Aqueous Film-Forming Foam (AFFF) (Correct answer)
- Carbon dioxide (CO₂)
Correct 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.
Question 3: A fire door assembly is rated primarily to resist which fire characteristic?
- Smoke migration only
- Heat and flame passage for a specified time period (Correct answer)
- Water damage from sprinkler systems
- Electrical conductivity
Correct 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.
Question 4: The 'water supply available pressure' for sprinkler system design is typically determined by which method?
- Manufacturer's specification sheets
- A fire flow test at a nearby hydrant (Correct answer)
- The municipal water district's billing records
- Extrapolation from rainfall data
Correct 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.
Question 5: Under NFPA 72, what is the maximum allowable spacing for smoke detectors installed on smooth flat ceilings?
- 15 feet
- 30 feet (Correct answer)
- 50 feet
- 60 feet
Correct answer: 30 feet
NFPA 72 specifies a maximum 30-foot spacing between smoke detectors on smooth, flat ceilings under standard conditions.
Question 6: The concept of 'life safety' in fire protection primarily addresses:
- Prevention of property loss
- Evacuation and protection of building occupants from fire effects (Correct answer)
- Preservation of historical structures
- Environmental protection from fire suppression chemicals
Correct 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.
Question 7: Which property of a liquid fuel determines whether it can sustain a flammable vapor above its surface at ambient temperature?
- Specific gravity
- Flash point (Correct answer)
- Boiling point
- Viscosity
Correct answer: Flash point
Flash point is the minimum temperature at which a liquid produces sufficient vapor to form an ignitable mixture near its surface.
CFPS Basic 3
What is the minimum required flow rate in gallons per minute (gpm) for a residential sprinkler head under NFPA 13D?