Page 1 of 148
California Fire Extinguisher Technician
Certification Exam — Comprehensive Practice
Questions with Verified Answers & Detailed
Rationales LATEST UPDATE THIS YEAR
California Fire Extinguisher Technician Certification Exam — Comprehensive Practice
Questions
Exam Overview
The California Fire Extinguisher Technician Certification Exam (OSFMFEI02 Fire Extinguisher 1) is
administered through Pearson VUE for the California State Fire Marshal (OSFM). It is a
computer-based, multiple-choice assessment that evaluates the knowledge, competencies, and
skills required for individuals who service, maintain, sell, or install portable fire extinguishers in
California. Passing this exam is mandatory for obtaining state licensure as a fire extinguisher
technician.
The exam focuses heavily on compliance with NFPA 10 (Standard for Portable Fire
Extinguishers) and California-specific regulations found in Title 19 of the California Code of
Regulations. Key topics include fire classification (A, B, C, D, K), extinguisher types and agents,
the P.A.S.S. operation method, and detailed maintenance schedules including monthly visual
inspections, annual maintenance, six-year internal exams, and hydrostatic testing intervals.
Exam Coverage Summary (Point Form)
Fire Science & Classification (~15%) : Fire tetrahedron, classes of fire (A, B, C, D, K), combustion
principles, extinguishing methods
Extinguisher Types & Agents (~20%) : Water, dry chemical, CO₂, clean agents, wet chemical, dry
powder, foam, halon, cartridge-operated vs. stored-pressure
Inspection & Maintenance (~20%) : Monthly inspections, annual maintenance, six-year internal
exams, maintenance tags, service collars, recordkeeping
Hydrostatic Testing (~15%) : Test intervals (5-year and 12-year), test procedures, cylinder
rejection criteria, permanent expansion limits
California Regulations & Licensing (~15%) : Title 19 requirements, license types (A, B, C, D, F),
OSFM certification, service tag requirements, prohibited practices
Installation & Placement (~10%) : Travel distances, mounting heights, hazard classification,
distribution requirements
Safety & Operation (~5%) : P.A.S.S. technique, safety precautions, agent compatibility
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SECTION 1: FIRE SCIENCE & CLASSIFICATION (Questions 1–25)
1. Which of the following BEST describes the "fire tetrahedron"?
A. Fuel, heat, and air only
B. Fuel, heat, oxygen, and a chemical chain reaction
C. Carbon, hydrogen, oxygen, and nitrogen
D. Ignition source, combustible material, and wind
Answer: B. The fire tetrahedron includes four elements: fuel, heat, oxygen, and an uninhibited
chemical chain reaction. Removing any one of these elements extinguishes the fire.
2. A fire involving ordinary combustibles such as wood, paper, and cloth is classified as:
A. Class A
B. Class B
C. Class C
D. Class D
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Answer: A. Class A fires involve ordinary solid combustibles like wood, paper, cloth, rubber, and
many plastics. Water or Class A-rated dry chemical extinguishers are effective.
3. Flammable liquids such as gasoline, oil, and grease fall under which fire class?
A. Class A
B. Class B
C. Class C
D. Class K
Answer: B. Class B fires involve flammable or combustible liquids, gases, and greases. Standard
ABC dry chemical and CO₂ extinguishers are used for these fires.
4. Which class of fire involves energized electrical equipment?
A. Class A
B. Class B
C. Class C
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D. Class D
Answer: C. Class C fires involve energized electrical equipment such as motors, appliances, and
power tools. The extinguishing agent must be non-conductive to prevent electrical shock to the
operator.
5. Which class of fire involves combustible metals such as magnesium, titanium, and sodium?
A. Class A
B. Class B
C. Class C
D. Class D
Answer: D. Class D fires involve combustible metals. Specialized dry powder extinguishing
agents are required because water or standard dry chemical agents can react violently with
burning metals.
6. What does the "K" class fire rating represent?
California Fire Extinguisher Technician
Certification Exam — Comprehensive Practice
Questions with Verified Answers & Detailed
Rationales LATEST UPDATE THIS YEAR
California Fire Extinguisher Technician Certification Exam — Comprehensive Practice
Questions
Exam Overview
The California Fire Extinguisher Technician Certification Exam (OSFMFEI02 Fire Extinguisher 1) is
administered through Pearson VUE for the California State Fire Marshal (OSFM). It is a
computer-based, multiple-choice assessment that evaluates the knowledge, competencies, and
skills required for individuals who service, maintain, sell, or install portable fire extinguishers in
California. Passing this exam is mandatory for obtaining state licensure as a fire extinguisher
technician.
The exam focuses heavily on compliance with NFPA 10 (Standard for Portable Fire
Extinguishers) and California-specific regulations found in Title 19 of the California Code of
Regulations. Key topics include fire classification (A, B, C, D, K), extinguisher types and agents,
the P.A.S.S. operation method, and detailed maintenance schedules including monthly visual
inspections, annual maintenance, six-year internal exams, and hydrostatic testing intervals.
Exam Coverage Summary (Point Form)
Fire Science & Classification (~15%) : Fire tetrahedron, classes of fire (A, B, C, D, K), combustion
principles, extinguishing methods
Extinguisher Types & Agents (~20%) : Water, dry chemical, CO₂, clean agents, wet chemical, dry
powder, foam, halon, cartridge-operated vs. stored-pressure
Inspection & Maintenance (~20%) : Monthly inspections, annual maintenance, six-year internal
exams, maintenance tags, service collars, recordkeeping
Hydrostatic Testing (~15%) : Test intervals (5-year and 12-year), test procedures, cylinder
rejection criteria, permanent expansion limits
California Regulations & Licensing (~15%) : Title 19 requirements, license types (A, B, C, D, F),
OSFM certification, service tag requirements, prohibited practices
Installation & Placement (~10%) : Travel distances, mounting heights, hazard classification,
distribution requirements
Safety & Operation (~5%) : P.A.S.S. technique, safety precautions, agent compatibility
,Page 2 of 148
SECTION 1: FIRE SCIENCE & CLASSIFICATION (Questions 1–25)
1. Which of the following BEST describes the "fire tetrahedron"?
A. Fuel, heat, and air only
B. Fuel, heat, oxygen, and a chemical chain reaction
C. Carbon, hydrogen, oxygen, and nitrogen
D. Ignition source, combustible material, and wind
Answer: B. The fire tetrahedron includes four elements: fuel, heat, oxygen, and an uninhibited
chemical chain reaction. Removing any one of these elements extinguishes the fire.
2. A fire involving ordinary combustibles such as wood, paper, and cloth is classified as:
A. Class A
B. Class B
C. Class C
D. Class D
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Answer: A. Class A fires involve ordinary solid combustibles like wood, paper, cloth, rubber, and
many plastics. Water or Class A-rated dry chemical extinguishers are effective.
3. Flammable liquids such as gasoline, oil, and grease fall under which fire class?
A. Class A
B. Class B
C. Class C
D. Class K
Answer: B. Class B fires involve flammable or combustible liquids, gases, and greases. Standard
ABC dry chemical and CO₂ extinguishers are used for these fires.
4. Which class of fire involves energized electrical equipment?
A. Class A
B. Class B
C. Class C
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D. Class D
Answer: C. Class C fires involve energized electrical equipment such as motors, appliances, and
power tools. The extinguishing agent must be non-conductive to prevent electrical shock to the
operator.
5. Which class of fire involves combustible metals such as magnesium, titanium, and sodium?
A. Class A
B. Class B
C. Class C
D. Class D
Answer: D. Class D fires involve combustible metals. Specialized dry powder extinguishing
agents are required because water or standard dry chemical agents can react violently with
burning metals.
6. What does the "K" class fire rating represent?
