CFPS Special Hazard Suppression 5

Question 1

Which NFPA standard covers water mist fire protection systems?

Accepted Answer

NFPA 750

Answer

NFPA 750 is the standard for water mist fire protection systems, covering design, installation, testing, and maintenance of all water mist applications.

Question 2

Water mist systems suppress fires primarily through which combined mechanisms?

Accepted Answer

Cooling of the flame and fuel plus inerting through steam generation

Answer

Water mist extinguishes fires by rapidly absorbing heat from the flame and fuel surface while fine droplets flash to steam, displacing oxygen and reducing radiant heat transfer.

Question 3

Per NFPA 750, high-pressure water mist systems are defined as systems operating at nozzle pressures:

Accepted Answer

Greater than 500 psi (34.5 bar)

Answer

NFPA 750 classifies water mist systems as low pressure (≤175 psi), intermediate pressure (175–500 psi), and high pressure (>500 psi) based on the distribution system working pressure.

Question 4

Fire suppression systems installed in spray application booths must comply with which primary standard in addition to any applicable suppression system standard?

Accepted Answer

NFPA 33 (Spray Application Using Flammable or Combustible Materials)

Answer

NFPA 33 governs spray application operations and specifies fire protection requirements for spray booths, including references to applicable suppression system standards based on the hazard.

Question 5

Clean agent total flooding systems are preferred over CO2 for protecting data centers primarily because:

Accepted Answer

Clean agents are safe for personnel at design concentrations and do not damage equipment

Answer

Clean agents such as FM-200 and Novec 1230 suppress fires at concentrations safe for brief occupant exposure and leave no residue, whereas CO2 at design concentrations is immediately dangerous to life and health.

CFPS (Certfied Fire Protection Specialist) Practice Test

CFPS (Certfied Fire Protection Specialist) Practice Test

CFPS Special Hazard Suppression 5