Portable Fire Extinguishers Flashcards
7 cards from real CFPS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Portable Fire Extinguishers flashcards as text
Which fire class designation on a portable fire extinguisher indicates the agent is non-conductive and safe for use on energized electrical equipment fires?
Answer: Class C
Class C-rated extinguishers use non-conductive agents, making them safe for use on fires involving energized electrical equipment.
Halon fire extinguishers are considered obsolete and are no longer manufactured for new applications primarily because:
Answer: Halon is an ozone-depleting substance regulated under the Montreal Protocol
Halon is an ozone-depleting substance whose production for new fire suppression applications was banned under the Montreal Protocol, making new halon extinguishers obsolete.
Which type of extinguishing agent must be used on Class D fires involving combustible metals such as magnesium, titanium, or sodium?
Answer: Metal-specific dry powder agent
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.
What is the primary extinguishing agent in a multi-purpose (ABC-rated) dry chemical fire extinguisher?
Answer: Monoammonium phosphate
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.
According to NFPA 10, how frequently must portable fire extinguishers undergo visual inspections?
Answer: At least monthly
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.
According to NFPA 10, in which occupancy hazard classification would a woodworking shop with significant sawdust accumulations most likely be placed?
Answer: Extra hazard
Woodworking shops with sawdust accumulations are classified as extra hazard because combustible dust significantly increases both fire risk and potential fire intensity.
When selecting a portable fire extinguisher for a new installation, which factor does NFPA 10 identify as the primary selection consideration?
Answer: The type of fire hazard present and the class of fire most likely to occur
NFPA 10 Section 5.2 establishes that the primary selection criterion is matching the extinguisher rating to the type of hazard and fire class most likely to occur in the protected area.