ICC/NAFED Certified Portable Fire Extinguisher Technician (FE) — Questions and Answers

Question 1: What is the purpose of the O-ring or gasket in the valve assembly of a fire extinguisher?

To indicate charge level
To restrict discharge flow rate
To hold the siphon tube in place
To create an airtight seal preventing leakage of agent or propellant (Correct answer)

Correct answer: To create an airtight seal preventing leakage of agent or propellant

O-rings and gaskets create pressure-tight seals in the valve assembly to prevent agent or gas from leaking during storage.

Question 2: Which record must be created when a new extinguisher is placed into service for the first time?

An initial placement record including location, type, size, serial number, and date of installation (Correct answer)
A hydrostatic test record
No record is needed until the first annual inspection
Only a purchase receipt

Correct answer: An initial placement record including location, type, size, serial number, and date of installation

An initial placement record establishes baseline documentation including the extinguisher's location, type, size, serial number, and installation date.

Question 3: Which type of extinguisher is most appropriate for a printing facility with large quantities of paper (Class A) and ink solvents (Class B)?

CO2 extinguisher only
Class D powder extinguisher
Water-only extinguisher
ABC multipurpose dry chemical extinguisher (Correct answer)

Correct answer: ABC multipurpose dry chemical extinguisher

ABC multipurpose dry chemical addresses both Class A (paper) and Class B (solvent) hazards, making it the correct choice for mixed-hazard facilities.

Question 4: Halon 1211 (bromochlorodifluoromethane) is classified as what type of extinguishing agent?

Wet chemical agent
Inert gas agent
Halogenated agent (Correct answer)
Dry powder agent

Correct answer: Halogenated agent

Halon 1211 is a halogenated (halocarbon) agent that extinguishes fire by chemically interrupting the combustion chain reaction.

Question 5: Which extinguisher component delivers the agent from the cylinder to the fire?

Carrying handle
Safety pin
Siphon (dip) tube (Correct answer)
Pressure indicator

Correct answer: Siphon (dip) tube

The siphon tube (dip tube) extends to the bottom of the cylinder, allowing pressurized gas to push the liquid or powder agent up and out through the valve.

Question 6: For a Class D combustible metal fire involving magnesium, which extinguisher should be used?

CO2
ABC dry chemical
Water
Dry powder specifically rated for the metal involved (e.g., Met-L-X) (Correct answer)

Correct answer: Dry powder specifically rated for the metal involved (e.g., Met-L-X)

Class D fires require a dry powder agent specifically matched to the burning metal — using the wrong agent can make the fire worse.

Question 7: What should an operator do if a fire is not extinguished after one full discharge of the extinguisher?

Immediately evacuate — do not re-enter to try a second extinguisher unless trained and conditions are safe (Correct answer)
Open windows to reduce smoke before re-attempting
Continue to aim the empty extinguisher at the fire
Try to smother the fire with a cloth

Correct answer: Immediately evacuate — do not re-enter to try a second extinguisher unless trained and conditions are safe

If a full discharge fails to extinguish the fire, the operator should evacuate immediately; a growing fire quickly becomes life-threatening.

Question 8: What is the required hydrostatic test interval for CO2 fire extinguishers?

6 years
10 years
12 years
5 years (Correct answer)

Correct answer: 5 years

CO2 extinguishers must be hydrostatically tested every 5 years because they operate at very high pressure.

Question 9: Which class of fire extinguisher is required to carry an electrical non-conductivity rating?

Class A only
Class C (any extinguisher used on energized electrical equipment) (Correct answer)
Class D only
Class B only

Correct answer: Class C (any extinguisher used on energized electrical equipment)

Class C rated extinguishers must use non-conductive agents (CO2, dry chemical, clean agent) and are tested to ensure they won't conduct electricity back to the user.

Question 10: Why must dry nitrogen (not CO2) be used to pressurize dry chemical stored-pressure extinguishers?

Nitrogen is cheaper than CO2
CO2 is only available in liquid form
CO2 can react with the dry chemical agent and cause caking or loss of pressure (Correct answer)
Nitrogen is heavier and provides more pressure

Correct answer: CO2 can react with the dry chemical agent and cause caking or loss of pressure

CO2 can react with moisture and dry chemical agents, potentially causing caking or pressure loss, so dry nitrogen is specified.

Question 11: What test is required before recharging a fire extinguisher that has been discharged but is past its hydrostatic test date?

Visual inspection only
Hydrostatic test before recharging (Correct answer)
Leak test only
Weight verification only

Correct answer: Hydrostatic test before recharging

An extinguisher that is past its hydrostatic test date must be tested hydrostatically before being recharged and returned to service.

Question 12: Why is the siphon tube length critical in a stored-pressure extinguisher?

Tube length affects hydrostatic test frequency
A tube that is too short may prevent full discharge of the agent (Correct answer)
Longer tubes require more propellant
Tube length determines pressure rating

Correct answer: A tube that is too short may prevent full discharge of the agent

If the siphon tube is too short, it won't reach the bottom of the cylinder, leaving agent behind and reducing effectiveness.

Question 13: When a fire extinguisher technician recommends an upgrade from a 2.5-lb CO2 to a 5-lb CO2 extinguisher, what primary benefit does this provide?

Lower recharge cost
Greater operating pressure
Longer discharge duration and greater extinguishing range for larger fire scenarios (Correct answer)
Lighter weight for easier portability

Correct answer: Longer discharge duration and greater extinguishing range for larger fire scenarios

A larger CO2 cylinder provides a longer discharge time and greater agent volume, allowing the operator to address larger fires more effectively.

Question 14: What is the role of the inspection tag on a fire extinguisher?

To track the extinguisher's age.
To document inspection and maintenance (Correct answer)
To indicate the model of the extinguisher.
To show the last time it was refilled.

Correct answer: To document inspection and maintenance

The inspection tag on a fire extinguisher plays a vital role in documenting its inspection and maintenance history. This tag records the dates of inspections, servicing, and hydrostatic tests, providing a clear audit trail of the unit's condition and compliance. It ensures accountability and confirms that the extinguisher has been regularly checked and is in proper working order.

Question 15: What is the maximum floor area per extinguisher for a light-hazard Class A occupancy under NFPA 10?

6,000 sq ft
3,000 sq ft
11,250 sq ft (Correct answer)
10,000 sq ft

Correct answer: 11,250 sq ft

For light-hazard occupancies, NFPA 10 allows a maximum coverage area of 11,250 square feet per extinguisher for Class A hazards.

Question 16: What type of tag or label is used to indicate that an extinguisher has been inspected and found to be in serviceable condition?

Yellow out-of-service tag
Blue maintenance tag
Red condemnation tag
Green or current-year inspection tag (Correct answer)

Correct answer: Green or current-year inspection tag

A current inspection tag (often color-coded by year) confirms the extinguisher was inspected and found in serviceable condition.

Question 17: The 'saponification' reaction relevant to Class K extinguisher agents describes which chemical process?

Oxidation of potassium ions releasing heat
Alkaline solution reacting with fatty acid oils to form soap and glycerol (Correct answer)
Reduction of CO2 at high cooking temperatures
Hydrolysis of foam concentrate in water

Correct answer: Alkaline solution reacting with fatty acid oils to form soap and glycerol

Saponification is the reaction between the alkaline wet chemical agent and the fatty acid cooking oils to form a soap-like emulsion that blankets the surface and prevents vapor release.

Question 18: AFFF (Aqueous Film Forming Foam) extinguishers are specifically effective on which type of fire?

Class D metal fires
Class C electrical fires
Class A ordinary combustibles only
Class B fires involving hydrocarbon fuels such as gasoline and aviation fuel (Correct answer)

Correct answer: Class B fires involving hydrocarbon fuels such as gasoline and aviation fuel

AFFF creates an aqueous film over Class B hydrocarbon fuels that seals vapors and cools the fuel surface, suppressing the fire.

Question 19: How often should the internal pressure of a fire extinguisher be checked?

Every year.
Every six months.
Every two years.
Every month (Correct answer)

Correct answer: Every month

The internal pressure of a fire extinguisher is critical for its proper operation, as it provides the force needed to expel the extinguishing agent. Therefore, the internal pressure, typically indicated by a gauge, should be checked every month during routine inspections. This ensures the extinguisher is always ready for immediate and effective use.

Question 20: Purple-K dry chemical extinguishing agent contains which primary chemical compound?

Monoammonium phosphate
Potassium bicarbonate (Correct answer)
Potassium chloride
Sodium bicarbonate

Correct answer: Potassium bicarbonate

Purple-K is a potassium bicarbonate-based dry chemical agent, which is approximately twice as effective as sodium bicarbonate on Class B fires.

Question 21: Which type of portable fire extinguisher requires internal examination at every 6-year interval?

CO2 extinguishers
Halotron extinguishers
Wet chemical extinguishers
Stored-pressure dry chemical extinguishers (Correct answer)

Correct answer: Stored-pressure dry chemical extinguishers

NFPA 10 requires a 6-year internal inspection of stored-pressure dry chemical extinguishers, coinciding with the 6-year maintenance service.

Question 22: Which dry chemical extinguishing agent is considered the most effective pound-for-pound on Class B flammable liquid fires?

Sodium bicarbonate
Monoammonium phosphate (ABC)
Potassium bicarbonate (Purple-K) (Correct answer)
Calcium chloride

Correct answer: Potassium bicarbonate (Purple-K)

Potassium bicarbonate (Purple-K) is approximately twice as effective as sodium bicarbonate on Class B fires because potassium ions are more efficient at interrupting combustion chain reactions.

Question 23: What type of hydrostatic test method involves filling the cylinder with water, pressurizing it, and measuring permanent expansion?

Pneumatic test
Burst test
Proof pressure test
Water jacket test (Correct answer)

Correct answer: Water jacket test

The water jacket test measures total and permanent expansion by immersing the pressurized cylinder in a water-filled jacket and recording displaced water.

Question 24: Which extinguishing agent is specifically recommended for Class K fires involving cooking oils and fats in commercial kitchens?

Wet chemical potassium acetate solution (Correct answer)
ABC dry chemical powder
Carbon dioxide (CO2)
AFFF aqueous film-forming foam

Correct answer: Wet chemical potassium acetate solution

Wet chemical agents (potassium acetate, potassium carbonate, or potassium citrate) are designed for Class K fires because they react with hot cooking oils to form a soapy foam layer via saponification.

Question 25: When mounting a fire extinguisher weighing 40 pounds or less, what is the maximum allowable handle height?

5 feet
4.5 feet
3 feet
3.5 feet (Correct answer)

Correct answer: 3.5 feet

For extinguishers weighing 40 pounds or less, NFPA 10 allows the handle to be mounted up to 3.5 feet high.

Question 26: Which of the following describes the operating mechanism of a pump-tank water extinguisher?

Water is expelled by a compressed nitrogen cartridge
A hand-operated pump pressurizes and discharges water on each stroke (Correct answer)
A stored charge of CO2 pressurizes the tank when activated
A chemical reaction generates gas pressure on demand

Correct answer: A hand-operated pump pressurizes and discharges water on each stroke

Pump-tank extinguishers rely on a manually operated pump that the user strokes repeatedly to pressurize and discharge water.

Question 27: After a fire extinguisher has been used partially, what is the correct action per NFPA 10?

Replace the pull pin and return to service
Return to service if gauge still reads in the green
Recharge immediately regardless of how much agent was used (Correct answer)
Leave it in service until annual inspection

Correct answer: Recharge immediately regardless of how much agent was used

NFPA 10 requires that any extinguisher that has been used, even partially, be recharged or replaced immediately.

Question 28: Which standard governs the installation and placement of portable fire extinguishers in the United States?

NFPA 10 (Correct answer)
ANSI Z535
OSHA 1910.157
NFPA 72

Correct answer: NFPA 10

NFPA 10, Standard for Portable Fire Extinguishers, is the primary document governing installation and placement.

Question 29: What is the primary purpose of the pull pin on a fire extinguisher?

To control discharge rate
To indicate service history
To prevent accidental discharge by blocking the handle (Correct answer)
To seal the discharge nozzle

Correct answer: To prevent accidental discharge by blocking the handle

The pull pin (safety pin) blocks the operating lever to prevent accidental discharge during handling and storage.

Question 30: What component of a dry chemical extinguisher prevents the powder from caking and ensures it discharges properly?

Pressure gauge bourdon tube
Discharge valve O-ring
Siphon tube screen
Anti-caking agitator bead (Correct answer)

Correct answer: Anti-caking agitator bead

Agitator beads inside the cylinder keep dry chemical powder loose and prevent caking so it flows freely during discharge.

Question 31: What is the maximum travel distance to a wheeled (Class B) extinguisher for extra-hazard occupancies?

75 feet
50 feet (Correct answer)
100 feet
30 feet

Correct answer: 50 feet

NFPA 10 requires a maximum travel distance of 50 feet to extinguishers for Class B extra-hazard occupancies.

Question 32: What must a technician do if they discover that a previous service record was falsified or inaccurate?

Ask the customer what they prefer
Document the discrepancy, notify the service company management, and ensure all deficiencies are corrected (Correct answer)
Ignore it if the extinguisher currently passes inspection
Correct the record silently

Correct answer: Document the discrepancy, notify the service company management, and ensure all deficiencies are corrected

Falsified records are a serious compliance and liability issue; the technician must document the discrepancy and escalate it through proper channels.

Question 33: What is the recommended method to test a fire extinguisher after maintenance?

Use it to extinguish a small fire.
Check for weight.
Activate it briefly in a controlled environment (Correct answer)
Test the nozzle flow.

Correct answer: Activate it briefly in a controlled environment

After maintenance, the recommended method to test a fire extinguisher is to activate it briefly in a controlled environment. This ensures that all components, such as the nozzle and valve, are functioning correctly without fully expending the extinguishing agent. This is a functional check, not a full discharge test on a live fire, which would require recharging.

Question 34: What does a broken or missing tamper seal on a fire extinguisher indicate?

Nothing — tamper seals are optional
The extinguisher is overcharged
The extinguisher is past its hydrostatic test date
The extinguisher may have been used or tampered with and requires inspection (Correct answer)

Correct answer: The extinguisher may have been used or tampered with and requires inspection

A broken tamper seal indicates the pull pin may have been removed, suggesting possible use or tampering that requires immediate inspection.

Question 35: How is the required number of extinguishers for a Class C hazard determined?

One extinguisher per electrical panel
Using Class A or B requirements based on the combustibles involved in addition to the electrical hazard (Correct answer)
Class C requires no portable extinguishers
Based solely on the electrical voltage present

Correct answer: Using Class A or B requirements based on the combustibles involved in addition to the electrical hazard

Class C electrical fires involve energized equipment; extinguisher number is based on the Class A or B combustible materials present.

Question 36: What is the main goal of a fire risk assessment?

To develop a fire evacuation plan.
To train personnel in fire safety.
To inspect the effectiveness of fire extinguishers.
To prevent fire hazards and reduce risks (Correct answer)

Correct answer: To prevent fire hazards and reduce risks

The main goal of a fire risk assessment is to prevent fire hazards and reduce risks. This systematic evaluation aims to identify potential fire threats, assess their likelihood and severity, and then implement appropriate control measures. By proactively addressing these risks, the assessment helps to prevent fires from occurring and minimize their impact if they do, thereby protecting lives and property.

Question 37: Which clean agent is most widely used as a replacement for Halon 1301 in fixed suppression systems?

CO2
FM-200 (HFC-227ea) (Correct answer)
AFFF foam
Nitrogen (IG-100)

Correct answer: FM-200 (HFC-227ea)

FM-200 (HFC-227ea) is the most widely used halon alternative for total-flooding applications because it has zero ozone depletion potential and extinguishes fires at low concentrations.

Question 38: Which of the following is a sign that a fire extinguisher needs servicing?

An unmarked hose.
A dirty label.
A cracked or dented body (Correct answer)
A missing pin.

Correct answer: A cracked or dented body

A cracked or dented body is a clear sign that a fire extinguisher needs servicing. Such physical damage can compromise the structural integrity of the cylinder, potentially leading to failure or rupture under pressure. This makes the extinguisher unsafe and unreliable, requiring immediate attention or replacement.

Question 39: In a multi-story building, where should fire extinguishers be placed on each floor?

Only near stairwells
Only where AHJ specifically requires
Near all exits and along normal paths of travel on each floor (Correct answer)
Only on the ground floor

Correct answer: Near all exits and along normal paths of travel on each floor

Each floor must have extinguishers placed near exits and along normal travel paths so occupants on every level have access.

Question 40: Carbon dioxide (CO2) extinguishes fires primarily by which two mechanisms?

Saponification and smothering
Emulsification and dilution
Oxygen displacement and cooling (Correct answer)
Chemical chain interruption and fuel removal

Correct answer: Oxygen displacement and cooling

CO2 extinguishes fire by displacing oxygen (smothering) and by absorbing heat energy, providing a cooling effect on the burning material.

Question 41: What is the minimum weight for a portable fire extinguisher in most commercial buildings?

1 lb.
2.5 lbs (Correct answer)
5 lbs.
10 lbs.

Correct answer: 2.5 lbs

In many commercial buildings, the minimum recommended weight for a portable fire extinguisher for general purpose use is 2.5 lbs (often with a 2A:10BC rating). This size provides a reasonable capacity for initial fire suppression without being overly cumbersome. Specific requirements can vary based on occupancy and hazard levels as outlined in NFPA 10.

Question 42: What is the minimum clearance that must be maintained at the top of a fire extinguisher from the floor in a vehicle or marine application?

6 inches
12 inches
4 inches
1 inch (Correct answer)

Correct answer: 1 inch

NFPA 10 requires at least 1 inch of clearance between the bottom of the extinguisher and the floor to prevent corrosion.

Question 43: Which extinguishing agent is electrically non-conductive and leaves virtually no residue after discharge?

AFFF foam
Dry chemical (monoammonium phosphate)
Carbon dioxide (CO2) (Correct answer)
Wet chemical potassium acetate

Correct answer: Carbon dioxide (CO2)

Carbon dioxide (CO2) is electrically non-conductive and dissipates completely as a gas, leaving no residue on equipment or surfaces.

Question 44: Which of the following is NOT a standard for fire extinguisher inspection?

Ensure the extinguisher is fully charged.
Test the fire extinguisher on a live fire (Correct answer)
Check the nozzle for blockages.
Inspect for visible damage.

Correct answer: Test the fire extinguisher on a live fire

Testing a fire extinguisher on a live fire is not a standard procedure for inspection; it is an actual use of the extinguisher that would require it to be recharged afterward. Standard inspections involve visual checks for damage, proper pressure, clear nozzles, and ensuring the unit is fully charged, without discharging its contents.

Question 45: What type of fire extinguisher is best suited for a wood or paper fire?

Class A (Correct answer)
Class D
Class C
Class B

Correct answer: Class A

Class A fires involve ordinary combustible materials such as wood, paper, cloth, and trash. Class A fire extinguishers typically use water or water-based agents to cool the fuel below its ignition temperature. This method effectively removes the heat element from the fire triangle, extinguishing the blaze.

Question 46: When extinguishers are located in a cabinet, what visibility requirement must be met?

Cabinet door must be transparent
Cabinet must be red
Location must be marked with a sign visible from 50 feet (Correct answer)
An alarm must sound when opened

Correct answer: Location must be marked with a sign visible from 50 feet

NFPA 10 requires that the location of extinguishers in cabinets be identified with a sign visible from at least 50 feet.

Question 47: Which factor most determines the correct minimum UL rating for an extinguisher in a given occupancy?

The hazard level (light, ordinary, extra) and the nature of the combustibles present (Correct answer)
The number of occupants in the building
The height of the ceiling
Color of the extinguisher shell

Correct answer: The hazard level (light, ordinary, extra) and the nature of the combustibles present

The occupancy hazard level and type of combustibles present determine the minimum UL rating required per NFPA 10 rating tables.

Question 48: During hydrostatic testing, what condition in the test water indicates a cylinder must be condemned?

Water turning slightly cloudy
Leakage, deformation, or failure to hold test pressure (Correct answer)
Change in water temperature
Slight bubbling during pressurization

Correct answer: Leakage, deformation, or failure to hold test pressure

Any leakage, permanent deformation, or inability to hold the test pressure means the cylinder must be condemned and removed from service.

Question 49: What is the role of the locking collar or anti-recoil device on a CO2 extinguisher valve?

It prevents the cylinder from rolling
It connects the gauge to the valve body
It indicates the date of last hydrostatic test
It locks the valve closed during transport to prevent accidental discharge (Correct answer)

Correct answer: It locks the valve closed during transport to prevent accidental discharge

The anti-recoil or locking collar prevents the valve from accidentally opening during transport, storage, or handling.

Question 50: What does the Schrader valve on a stored-pressure extinguisher do?

Indicates remaining pressure
Connects the siphon tube to the nozzle
Controls discharge rate
Provides a fill port for both agent and expellant gas (Correct answer)

Correct answer: Provides a fill port for both agent and expellant gas

The Schrader valve is a fill port used to charge (pressurize) stored-pressure extinguishers with both agent and propellant gas.

Question 51: What is the purpose of the collar or label placed on a cylinder after hydrostatic testing?

To show the agent type
To provide a permanent record of the test date, pressure, and tester identification on the cylinder (Correct answer)
To indicate the extinguisher brand
To replace the annual inspection tag

Correct answer: To provide a permanent record of the test date, pressure, and tester identification on the cylinder

The hydrostatic test collar or label permanently records the test date, pressure used, and the identity of the testing facility directly on the cylinder.

Question 52: Which fire extinguisher type should never be used on a liquid fire?

Class B
Class A
Class A (water-based) (Correct answer)
Class C

Correct answer: Class A (water-based)

Class A (water-based) fire extinguishers are designed for ordinary combustibles like wood and paper. Using water on a Class B (liquid) fire can be extremely dangerous as it can spread the flammable liquid, making the fire larger and more difficult to control. Water can also cause a violent reaction if the liquid is superheated.

Question 53: When must fire extinguisher inspection and maintenance records be made available?

Only at permit renewal
Only during insurance audits
Only if a fire incident occurs
Upon request by the AHJ (Authority Having Jurisdiction) at any time (Correct answer)

Correct answer: Upon request by the AHJ (Authority Having Jurisdiction) at any time

Records must be available upon request by the AHJ at any time to verify compliance with NFPA 10 and local fire codes.

Question 54: During a monthly visual inspection, what should the inspector document if an extinguisher is found to be missing?

The location, date, and discovery of the missing unit, then notify the responsible party immediately (Correct answer)
Nothing — only pass/fail is needed
Monthly inspections don't require documentation
Only the unit serial number in a log

Correct answer: The location, date, and discovery of the missing unit, then notify the responsible party immediately

A missing extinguisher must be documented with location and date, and the responsible party notified immediately so replacement is expedited.

Question 55: What action should a technician take if a fire extinguisher mounting bracket is damaged or missing?

Tag the extinguisher and leave it on the floor temporarily
Hang the extinguisher from its ring pin
Submit a report and wait for the next annual inspection
Replace the bracket immediately before returning the extinguisher to service (Correct answer)

Correct answer: Replace the bracket immediately before returning the extinguisher to service

A damaged or missing bracket must be replaced immediately to ensure the extinguisher is properly secured and accessible.

Question 56: A fire in a propane storage area is best addressed with which type of extinguisher?

Class B dry chemical (BC or ABC) extinguisher (Correct answer)
Class A water mist extinguisher
Class D dry powder extinguisher
Water extinguisher

Correct answer: Class B dry chemical (BC or ABC) extinguisher

Propane is a flammable gas (Class B fuel), so a BC or ABC dry chemical extinguisher is the correct choice.

Question 57: Which of the following extinguishing agents is commonly used in Class D fire extinguishers?

Foam
Dry Powder (Correct answer)
CO2
Water

Correct answer: Dry Powder

Class D fires involve combustible metals like magnesium, titanium, or sodium, which burn at extremely high temperatures. These fires require specialized dry powder agents that work by smothering the fire and absorbing heat. Using water or other common extinguishing agents can react violently with burning metals, making the fire worse.

Question 58: What information is required on the inspection tag attached to a fire extinguisher after an annual inspection?

Agent type and charge weight only
Only the next inspection due date
Inspector's name or initials, date of inspection, and service company identification (Correct answer)
Owner's name and building address only

Correct answer: Inspector's name or initials, date of inspection, and service company identification

NFPA 10 requires that the inspection tag include the inspector's identity, the inspection date, and the service organization's identification.

Question 59: How should risks be prioritized during fire risk assessments?

By how easily it can be controlled.
By the cost of mitigation.
By the severity of the risk and its likelihood (Correct answer)
By the time of year.

Correct answer: By the severity of the risk and its likelihood

During fire risk assessments, risks should be prioritized by the severity of the risk and its likelihood. This means focusing on hazards that have the potential for the most severe consequences and are most likely to occur. This approach ensures that the most critical and probable risks are addressed first, optimizing safety efforts and resource allocation.

Question 60: What is the primary advantage of using a Class K fire extinguisher?

They are suitable for metal fires.
They are used for wood and paper fires.
They are ideal for electrical fires.
They are effective on grease fires (Correct answer)

Correct answer: They are effective on grease fires

Class K fire extinguishers are specifically designed for fires involving cooking oils and fats (grease fires) commonly found in commercial kitchens. They use a wet chemical agent that creates a foam blanket, cooling the fuel and preventing reignition. This makes them highly effective and safe for these specific types of fires.

Question 61: In a cartridge-operated extinguisher, what component must be checked and possibly replaced at each annual inspection?

Tamper seal color
Main cylinder pressure gauge
Gas cartridge weight and seal condition (Correct answer)
Nozzle diameter

Correct answer: Gas cartridge weight and seal condition

The gas cartridge must be weighed and its seal inspected annually to confirm it holds its charge and is ready for operation.

Question 62: What is the function of the discharge nozzle horn on a CO2 extinguisher?

Indicates pressure level
Directs the CO2 stream and reduces static discharge risk (Correct answer)
Acts as a carrying handle
Prevents freezing of the valve

Correct answer: Directs the CO2 stream and reduces static discharge risk

The CO2 horn directs the gas stream at the fire and is made of non-conductive material to reduce the risk of static discharge.

Question 63: What information must be recorded on a fire extinguisher after hydrostatic testing?

Inspector name only
Test date, test pressure, and tester identity stamped or labeled on the cylinder (Correct answer)
Only the next test due date
Manufacturer part number

Correct answer: Test date, test pressure, and tester identity stamped or labeled on the cylinder

After hydrostatic testing, the test date, pressure used, and the identity of the testing facility must be permanently marked on the cylinder.

Question 64: Under NFPA 10, how often must stored-pressure dry chemical extinguishers with stainless steel shells undergo hydrostatic testing?

Every 10 years
Every 6 years
Every 12 years (Correct answer)
Every 5 years

Correct answer: Every 12 years

Stored-pressure dry chemical extinguishers with stainless steel shells must be hydrostatically tested every 12 years per NFPA 10.

Question 65: What is the approximate specific gravity of carbon dioxide gas compared to air at standard conditions?

0.7 (lighter than air)
2.5 (much heavier than air)
1.5 (heavier than air) (Correct answer)
1.0 (same weight as air)

Correct answer: 1.5 (heavier than air)

CO2 has a specific gravity of approximately 1.5 relative to air, which causes it to settle at low points and displace oxygen effectively in enclosed spaces.

Question 66: AFFF (Aqueous Film-Forming Foam) creates a suppression layer on flammable liquid fires by which mechanism?

Releasing CO2 gas from the foam bubbles
Forming a thin aqueous film that seals the fuel surface (Correct answer)
Chemically reacting with hydrocarbon vapors
Cooling the fuel below its flash point through water absorption only

Correct answer: Forming a thin aqueous film that seals the fuel surface

AFFF works by spreading a thin aqueous film over the fuel surface that seals vapors, preventing them from reaching the flame, while also cooling the fuel with water.

Question 67: When is it appropriate for a trained occupant to attempt to fight a fire with a portable extinguisher?

Only professional firefighters should use extinguishers
Only when the sprinkler system has already activated
Always — extinguishers are provided for this purpose
Only when the fire is small, confined, the alarm is activated, an exit is behind them, and they are trained (Correct answer)

Correct answer: Only when the fire is small, confined, the alarm is activated, an exit is behind them, and they are trained

Occupant use is appropriate only for small, incipient-stage fires when conditions are safe: alarm active, exit available, and the person is trained.

Question 68: What is a key limitation of using CO2 extinguishers outdoors?

CO2 damages vegetation
CO2 pressure drops below operating level outdoors
Wind disperses the CO2 cloud, significantly reducing extinguishing effectiveness (Correct answer)
CO2 is illegal for outdoor use

Correct answer: Wind disperses the CO2 cloud, significantly reducing extinguishing effectiveness

Wind rapidly disperses the CO2 cloud, preventing it from building up the concentration needed to extinguish the fire.

Question 69: Sodium bicarbonate dry chemical is rated for use on which fire classes?

Class B and C fires only (Correct answer)
Class A, B, and C fires
Class D fires only
Class A and B fires only

Correct answer: Class B and C fires only

Sodium bicarbonate (ordinary dry chemical) is rated for Class B (flammable liquids) and Class C (energized electrical) fires but is not effective on Class A fires.

Question 70: What type of fire extinguisher is most suitable for fires involving flammable liquids?

Class A
Class D
Class B (Correct answer)
Class C

Correct answer: Class B

Class B fires involve flammable liquids such as gasoline, oil, or grease. Class B fire extinguishers are formulated to smother these types of fires by cutting off the oxygen supply or inhibiting the chemical chain reaction. This prevents the fire from reigniting and effectively extinguishes it.

Question 71: Which type of fire extinguisher uses a separate cartridge of CO2 or nitrogen to expel the agent?

Pump-tank type
Cartridge-operated type (Correct answer)
Stored-pressure type
Self-expelling type

Correct answer: Cartridge-operated type

Cartridge-operated extinguishers have a separate gas cartridge that is punctured upon operation to pressurize the agent in the main cylinder.

Question 72: What is considered a major hazard during a fire risk assessment?

Excessive use of electricity.
Lack of fire extinguishers.
Flammable materials and faulty wiring (Correct answer)
Insufficient emergency exits.

Correct answer: Flammable materials and faulty wiring

During a fire risk assessment, flammable materials and faulty wiring are considered major hazards. Flammable materials provide the fuel for a fire, allowing it to start and spread rapidly. Faulty wiring is a common source of ignition due to overheating or arcing. Both represent direct and significant threats that require immediate attention to prevent fire incidents.

Question 73: What must be recorded when a fire extinguisher is recharged at a 6-year internal maintenance?

Only the recharge date
Internal examination findings, parts replaced, and the technician's identity (Correct answer)
Only the new charge weight
Manufacturer serial number only

Correct answer: Internal examination findings, parts replaced, and the technician's identity

The 6-year maintenance record must document findings from the internal examination, any parts replaced, and who performed the work.

Question 74: What should be done if a fire extinguisher is found to have a damaged handle?

Test the handle for functionality.
Reapply the safety pin.
Clean the exterior.
Replace the extinguisher immediately (Correct answer)

Correct answer: Replace the extinguisher immediately

A damaged handle on a fire extinguisher is a critical defect that can prevent its proper operation or safe handling during an emergency. Such damage compromises the user's ability to activate the extinguisher effectively and safely. Therefore, an extinguisher with a damaged handle must be immediately removed from service and replaced to ensure fire safety.

Question 75: What maximum permanent expansion percentage typically requires a cylinder to be condemned during hydrostatic testing?

15%
5%
2%
10% (Correct answer)

Correct answer: 10%

A cylinder exhibiting permanent expansion exceeding 10% of total expansion is typically condemned as structurally compromised.

Question 76: Which action should be taken if a fire extinguisher has visible rust or corrosion?

Apply a coat of paint.
Remove it from service and replace it (Correct answer)
Polish it to remove the rust.
Clean it thoroughly.

Correct answer: Remove it from service and replace it

If a fire extinguisher has visible rust or corrosion, it indicates a compromise in the integrity of the cylinder, which can weaken the container and make it unsafe. A corroded extinguisher could fail under pressure, posing a significant hazard. Therefore, it must be immediately removed from service and replaced to ensure safety and compliance.

Question 77: What does the pressure gauge on a stored-pressure extinguisher measure?

Weight of remaining agent
Ambient temperature
CO2 cartridge charge level
Internal pressure of the combined agent and propellant gas (Correct answer)

Correct answer: Internal pressure of the combined agent and propellant gas

The pressure gauge measures the internal pressure of the stored-pressure extinguisher, indicating whether it is properly charged.

Question 78: Which agent must be used when recharging a Purple-K (PKP) dry chemical extinguisher?

Sodium bicarbonate dry chemical
Any UL-listed dry chemical agent
Purple-K potassium bicarbonate dry chemical only (Correct answer)
ABC multipurpose dry chemical

Correct answer: Purple-K potassium bicarbonate dry chemical only

Purple-K extinguishers must be recharged with Purple-K (potassium bicarbonate) only — mixing dry chemical agents is prohibited.

Question 79: After recharging a wet chemical (Class K) extinguisher, what must the technician verify before returning it to service?

That agent level, pressure, and nozzle condition all meet manufacturer specifications (Correct answer)
That the cylinder is warm to the touch
That the label matches the previous label exactly
That the agent is blue in color

Correct answer: That agent level, pressure, and nozzle condition all meet manufacturer specifications

Before returning a recharged wet chemical extinguisher to service, the technician must verify correct agent fill level, proper pressure, and clean nozzle condition.

Question 80: What does the fire extinguisher's 'pass' inspection tag indicate?

The extinguisher meets safety standards (Correct answer)
The extinguisher is overcharged.
The extinguisher has been tested.
The extinguisher is ready to be used.

Correct answer: The extinguisher meets safety standards

A 'pass' inspection tag indicates that the fire extinguisher has undergone a thorough inspection and has been found to be in proper working condition, meeting all applicable safety standards and regulations. This tag confirms its readiness for use and compliance, providing assurance that it will function as intended in an emergency.

Question 81: What is the function of the hose assembly on large dry chemical extinguishers?

To fill the cylinder during recharging
To allow the agent to be applied from a distance and aimed precisely at the base of the fire (Correct answer)
To measure discharge flow rate
To connect the pressure gauge

Correct answer: To allow the agent to be applied from a distance and aimed precisely at the base of the fire

The hose assembly gives the operator reach and the ability to aim the nozzle at the fire's base from a safe distance.

Question 82: Which organization's certification is most widely recognized in the US for portable fire extinguisher service technicians?

NFPA
OSHA
NICET (National Institute for Certification in Engineering Technologies) (Correct answer)
ICC (International Code Council)

Correct answer: NICET (National Institute for Certification in Engineering Technologies)

NICET offers widely recognized certification for fire protection technicians, including portable fire extinguisher servicing.

Question 83: What is typically used to permanently mark a condemned fire extinguisher cylinder to prevent re-use?

A sticker that says 'condemned'
Physical destruction of the cylinder neck threads or cylinder body (Correct answer)
Removal of the pressure gauge
A red tag only

Correct answer: Physical destruction of the cylinder neck threads or cylinder body

To prevent a condemned cylinder from being placed back into service, it must be physically destroyed — typically by cutting the cylinder or destroying the neck threads.

Question 84: What is the most important safety rule when using a CO2 extinguisher in a confined space?

Evacuate the area immediately after use — CO2 displaces oxygen and creates an asphyxiation hazard (Correct answer)
Aim at the ceiling, not the base of the fire
Use only half the charge to avoid over-discharge
Turn off all lights before discharging

Correct answer: Evacuate the area immediately after use — CO2 displaces oxygen and creates an asphyxiation hazard

CO2 displaces oxygen and in an enclosed space can cause unconsciousness or death; all personnel must evacuate immediately.

Question 85: What action should be taken first upon discovering a small fire before using a fire extinguisher?

Move combustible materials away from the fire
Activate the building fire alarm and ensure occupants are evacuating (Correct answer)
Call the manufacturer's service hotline
Immediately discharge the extinguisher

Correct answer: Activate the building fire alarm and ensure occupants are evacuating

Activating the alarm and initiating evacuation are the top priorities — life safety comes before fire suppression attempts.

Question 86: What must a service report provided to the building owner after annual maintenance include?

Only the total invoice amount
A list of all extinguishers serviced, deficiencies found, corrective actions taken, and technician identification (Correct answer)
Only extinguishers that failed inspection
Only the next service due date

Correct answer: A list of all extinguishers serviced, deficiencies found, corrective actions taken, and technician identification

The service report must comprehensively document all units serviced, any deficiencies found, corrections made, and who performed the work.

Question 87: A technician is selecting an extinguisher for a server room. Which agent is preferred to minimize equipment damage?

AFFF foam
CO2 or clean agent (Halotron/FM-200) (Correct answer)
Water
ABC dry chemical

Correct answer: CO2 or clean agent (Halotron/FM-200)

CO2 and clean agents leave no residue, making them ideal for sensitive electronic equipment where dry chemical or water damage would be catastrophic.

Question 88: What is the primary purpose of hazard identification in fire safety?

To provide fire safety training.
To assess the damage after a fire.
To develop fire evacuation plans.
To identify potential fire hazards before they cause harm (Correct answer)

Correct answer: To identify potential fire hazards before they cause harm

The primary purpose of hazard identification in fire safety is to proactively identify potential fire hazards before they cause harm. This involves recognizing sources of ignition, fuel, and oxygen, as well as conditions that could lead to a fire. By identifying these risks early, preventative measures can be implemented to mitigate or eliminate them, thereby preventing fires.

Question 89: When a fire extinguisher is condemned and removed from service, what must be done according to NFPA 10?

Render it completely inoperable before disposal and record its removal (Correct answer)
Store it for spare parts
Simply discard it
Transfer it to another location

Correct answer: Render it completely inoperable before disposal and record its removal

A condemned extinguisher must be made completely inoperable (e.g., cylinder destroyed) before disposal, and its removal must be documented.

Question 90: What is the correct pressure range for charging a standard ABC stored-pressure dry chemical extinguisher?

125–175 psi (Correct answer)
75–100 psi
200–250 psi
100–125 psi

Correct answer: 125–175 psi

Standard ABC stored-pressure dry chemical extinguishers are typically charged to 125–175 psi with dry nitrogen as specified by the manufacturer.

Question 91: Which regulatory authority governs the hydrostatic testing of fire extinguisher cylinders in the United States?

EPA
DOT (Department of Transportation) (Correct answer)
CPSC
OSHA

Correct answer: DOT (Department of Transportation)

The DOT regulates the design, manufacture, testing, and marking of pressure vessels including fire extinguisher cylinders.

Question 92: What is the maximum travel distance to a fire extinguisher for Class B flammable liquid hazards?

30 feet
75 feet
100 feet
50 feet (Correct answer)

Correct answer: 50 feet

NFPA 10 requires a maximum travel distance of 50 feet to a fire extinguisher for Class B hazards.

Question 93: What is the UL rating system used to communicate the firefighting capability of a portable extinguisher?

A letter-number rating (e.g., 2A:10B:C) where the number indicates extinguishing potential (Correct answer)
A weight-based code indicating agent mass
A color band indicating hazard class only
A numerical code indicating gallons of agent

Correct answer: A letter-number rating (e.g., 2A:10B:C) where the number indicates extinguishing potential

The UL rating uses a letter for fire class and a number (for A and B) representing comparative extinguishing potential on standardized test fires.

Question 94: The PASS acronym used to operate a fire extinguisher stands for:

Pull, Aim, Squeeze, Sweep (Correct answer)
Point, Activate, Stand back, Spray
Press, Aim, Squeeze, Spread
Pull, Assess, Stand, Spray

Correct answer: Pull, Aim, Squeeze, Sweep

PASS stands for Pull the pin, Aim at the base of the fire, Squeeze the handle, and Sweep side to side.

Question 95: How long must fire extinguisher service records be retained according to NFPA 10?

1 year
Until the next service only
The life of the extinguisher (Correct answer)
5 years minimum

Correct answer: The life of the extinguisher

NFPA 10 requires that maintenance and recharge records be retained for the life of the extinguisher.

Question 96: When is it acceptable to top off (add a small amount of agent) to a partially discharged dry chemical extinguisher instead of fully recharging it?

When it would save the agency money
When less than 10% of the agent was used
Never — partial discharge requires complete recharge (Correct answer)
When the pressure gauge still reads green

Correct answer: Never — partial discharge requires complete recharge

NFPA 10 does not permit topping off; any partial or full discharge requires a complete recharge with fresh agent.

Question 97: Why should the nozzle of a CO2 extinguisher never be touched during or immediately after discharge?

The nozzle becomes electrically charged
The nozzle may detach if touched
The nozzle can reach extremely cold temperatures causing frostbite (Correct answer)
CO2 residue is corrosive to skin

Correct answer: The nozzle can reach extremely cold temperatures causing frostbite

CO2 expansion during discharge causes the horn and nozzle to drop to very low temperatures, posing a serious frostbite risk.

Question 98: Which component allows a technician to determine if a water-based extinguisher has sufficient agent without discharging it?

Sight glass
Weight measurement against the gross weight label (Correct answer)
Tamper indicator
Pressure gauge only

Correct answer: Weight measurement against the gross weight label

Water-based extinguishers should be weighed and compared to the gross weight on the label to confirm adequate agent level.

Question 99: A fire extinguisher must be installed so it is protected from which environmental condition that could affect its operation?

Low humidity
Normal room temperature
Moderate sunlight
Freezing temperatures that could damage the agent or cylinder (Correct answer)

Correct answer: Freezing temperatures that could damage the agent or cylinder

Extinguishers must be protected from freezing because low temperatures can damage water-based agents and cause cylinder failure.

Question 100: What is the role of the National Fire Protection Association (NFPA)?

To inspect fire safety systems in buildings.
To provide free fire safety equipment.
To issue fines for fire safety violations.
To establish fire safety codes and standards (Correct answer)

Correct answer: To establish fire safety codes and standards

The National Fire Protection Association (NFPA) is a leading organization whose primary role is to establish fire safety codes and standards. These consensus-based documents, such as NFPA 10 for portable fire extinguishers, serve as benchmarks for fire prevention, protection, and safety practices globally. They guide everything from building design to equipment maintenance, ensuring a consistent level of safety.

ICC/NAFED Certified Portable Fire Extinguisher Technician (FE)

The FE certification exam tests technicians on the inspection, maintenance, hydrostatic testing, recharging, placement, and recordkeeping of portable fire extinguishers in accordance with NFPA 10 and manufacturer specifications.

100

Questions

120 min

Time Limit

75%

To Pass

Checking for saved progress...

Exam Rules

You can skip questions and return to them later
Flag questions for review before submitting
No feedback shown until you submit the entire exam
Unanswered questions count as wrong — answer everything
10 pretest questions are mixed in and don't affect your score
Timer auto-submits when time runs out
Your progress is auto-saved every 30 seconds

These practice questions were written with AI tools. They are not real exam questions. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

nafed.org — Test delivery, fees, exam format, passing score, retake policy, score release, score validity · verified Oct 2026
iccsafe.org — Time limit · verified Oct 2026