NICET Special Hazard Suppression Systems 2

Question 1

Which NFPA standard governs dry chemical extinguishing systems?

Accepted Answer

NFPA 17

Answer

NFPA 17 is the Standard for Dry Chemical Extinguishing Systems and covers design, installation, testing, and maintenance requirements.

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

Local application directs CO2 directly at the fuel surface or equipment when building a total-flooding enclosure is impractical or uneconomical.

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

Pre-discharge alarms provide an audible/visual warning so personnel can evacuate the hazard area before the agent is released, preventing exposure to potentially hazardous concentrations.

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

Halon 1301 contains bromine, a highly effective ozone-depleting substance; its production was banned in developed countries by 1994 under the Montreal Protocol.

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

AFFF creates a thin aqueous film that spreads across the fuel surface rapidly, making it uniquely effective against spill fires and three-dimensional flowing fuel fires.

NICET - National Institute for Certification in Engineering Technologies Practice Test

NICET - National Institute for Certification in Engineering Technologies Practice Test

NICET Special Hazard Suppression Systems 2