CORRECT ANSWERS.
Core Concepts & Definitions (Questions 1-25)
1. A three-dimensional fire often involves static flammable liquid.
A) True
B) False
Answer: B) False
Rationale: 3D fires involve flammable liquid in motion as well as both horizontal
and vertical surfaces. They are not static.
2. Class A fire extinguishers are suitable for which types of materials?
A) Flammable liquids and gases
B) Live electrical equipment
,C) Wood, paper, some plastics, and textiles
D) Cooking media (grease/oil)
Answer: C) Wood, paper, some plastics, and textiles
Rationale: Class A extinguishers are designed for ordinary combustibles. They
offer the coating effects of dry chemicals.
3. According to OSHA, how often must portable fire extinguishers receive a visual
inspection?
A) Weekly
B) Monthly
C) Annually
D) Every 5 years
,Answer: B) Monthly
Rationale: 29 CFR 1910.157(e)(2) requires portable fire extinguishers to be visually
inspected at least monthly to ensure they are in their designated place and have
not been actuated or tampered with.
4. Class A/B fire extinguishers should be used on which type of fire?
A) Fires involving live electrical equipment
B) Ordinary combustibles only
C) Flammable liquids only
D) Both ordinary combustibles and flammable liquids, but not electrical fires
Answer: D) Both ordinary combustibles and flammable liquids, but not electrical
fires
, Rationale: Class A/B extinguishers should NOT be used for fires that involve live
electrical equipment. They are suitable for Class A (ordinary combustibles) and
Class B (flammable liquids) only.
5. For an extinguisher weighing over 40 lbs, the top should be installed no more
than what height from the ground?
A) 5 feet
B) 4.5 feet
C) 4 feet
D) 3.5 feet
Answer: D) 3.5 feet
Rationale: Extinguishers weighing over 40 lbs must be installed so the top is no
more than 3.5 feet above the floor to ensure accessibility.