NICET Special Hazard Suppression Systems 2

Question 1

Which NFPA standard governs dry chemical extinguishing systems?

Accepted Answer

NFPA 17

Answer

NFPA 11

Answer

NFPA 12

Answer

NFPA 750

Question 2

A CO2 local application system is the preferred approach when protecting a hazard that:

Accepted Answer

Cannot be economically enclosed and total flooding is impractical

Answer

Is located in a tightly enclosed vault with no personnel access

Answer

Involves only Class A deep-seated fires

Answer

Is in a normally occupied space requiring personnel warning time

Question 3

What is the primary purpose of a pre-discharge alarm in a total flooding gaseous suppression system?

Accepted Answer

To warn occupants to evacuate before the agent discharges

Answer

To trigger the suppression agent release

Answer

To automatically notify the fire department

Answer

To shut down all electrical equipment in the hazard area

Question 4

Halon 1301 was phased out of new production primarily because of:

Accepted Answer

Its ozone-depleting properties identified under the Montreal Protocol

Answer

High acute toxicity to building occupants at design concentrations

Answer

Poor fire suppression performance compared to CO2

Answer

Prohibitive manufacturing costs that made it economically unviable

Question 5

Which foam type is most effective at controlling three-dimensional and flowing liquid hydrocarbon fires?

Accepted Answer

AFFF (Aqueous Film Forming Foam)

Answer

High-expansion foam

Answer

Protein foam

Answer

Air-aspirated protein foam

Question 6

Per NFPA 750, what droplet size criterion defines a water mist system discharge?

Accepted Answer

The Dv0.99 (99th percentile droplet diameter) must be less than or equal to 1000 microns

Answer

All droplets must be smaller than 100 microns

Answer

Average droplet diameter must be greater than 2000 microns

Answer

All droplets must be larger than 500 microns to ensure surface cooling

Question 7

Under NFPA 2001, FK-5-1-12 (Novec 1230) is classified as which agent type?

Accepted Answer

Halocarbon clean agent

Answer

Inert gas clean agent

Answer

Dry chemical agent

Answer

CO2-based clean agent