CFPS Portable Fire Extinguishers 3

Question 1

Which fire class designation on a portable fire extinguisher indicates the agent is non-conductive and safe for use on energized electrical equipment fires?

Accepted Answer

Class C

Answer

Class C-rated extinguishers use non-conductive agents, making them safe for use on fires involving energized electrical equipment.

Question 2

Halon fire extinguishers are considered obsolete and are no longer manufactured for new applications primarily because:

Accepted Answer

Halon is an ozone-depleting substance regulated under the Montreal Protocol

Answer

Halon is an ozone-depleting substance whose production for new fire suppression applications was banned under the Montreal Protocol, making new halon extinguishers obsolete.

Question 3

Which type of extinguishing agent must be used on Class D fires involving combustible metals such as magnesium, titanium, or sodium?

Accepted Answer

Metal-specific dry powder agent

Answer

Class D fires require a dry powder agent specifically formulated for the particular combustible metal involved, as common agents can react violently with burning metals.

Question 4

What is the primary extinguishing agent in a multi-purpose (ABC-rated) dry chemical fire extinguisher?

Accepted Answer

Monoammonium phosphate

Answer

Multi-purpose (ABC) dry chemical extinguishers use monoammonium phosphate, which melts on contact with hot surfaces to form a smothering residue that provides the Class A rating.

Question 5

According to NFPA 10, how frequently must portable fire extinguishers undergo visual inspections?

Accepted Answer

At least monthly

Answer

NFPA 10 Section 7.2 requires that portable fire extinguishers be visually inspected at least once per month to confirm they remain in their designated location and are in operable condition.

CFPS (Certfied Fire Protection Specialist) Practice Test

CFPS (Certfied Fire Protection Specialist) Practice Test

CFPS Portable Fire Extinguishers 3