FSFC149 Portable Extinguisher Licensee Exam

FSFC149 Portable Extinguisher Licensee Exam

• Which component on a portable fire extinguisher indicates if it is fully pressurized or needs

recharging?

• Handle
• Gauge
• Valve
• Nozzle

Correct Answer: B

Explanation: The gauge shows if the extinguisher’s internal pressure is in the correct range, signaling whether it is ready for use or needs servicing.

• Which class of fire extinguisher is specifically designed to combat flammable liquid fires such

as grease and gasoline?

• Class A
• Class B
• Class C
• Class K

Correct Answer: B

Explanation: Class B fire extinguishers are intended for fires involving flammable liquids like gasoline, oil, and grease.

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FSFC149 Portable Extinguisher Licensee Exam

• Why should an extinguisher be aimed at the base of a fire rather than the flames?
• To cool the area above the fire
• To avoid damaging equipment
• To attack the fire’s fuel source and interrupt combustion
• To prevent user injury

Correct Answer: C

Explanation: By aiming at the base, you target the fire's fuel source, effectively interrupting the combustion process and extinguishing it more quickly.

• What is the primary extinguishing agent in a typical Class C fire extinguisher?
• Pressurized water
• Dry chemical (often monoammonium phosphate)
• Wet chemical
• Foam

Correct Answer: B

Explanation: Dry chemical extinguishers are commonly used for Class C electrical fires as they do not conduct electricity and effectively smother the fire.

• When using a fire extinguisher, the recommended sweeping motion is from side to side and: 2 / 4

FSFC149 Portable Extinguisher Licensee Exam

• In rapid upward strokes
• Slowly from the edges to the center
• As close to the flames as possible
• At a controlled pace to cover the entire fire base

Correct Answer: D

Explanation: A controlled side-to-side sweeping motion at the fire’s base helps ensure the agent covers all burning material.

• Which of the following fires is a Class D fire extinguisher intended to put out?
• Combustible metals like magnesium
• Ordinary combustibles like wood
• Flammable liquids like gasoline
• Commercial cooking oil

Correct Answer: A

Explanation: Class D extinguishers are formulated for combustible metals, such as magnesium, potassium, and sodium.

• Why is it important to conduct a monthly visual inspection of a fire extinguisher?
• To inflate it with more pressurized air 3 / 4

FSFC149 Portable Extinguisher Licensee Exam

• To verify the extinguisher is accessible, charged, and undamaged
• To test the discharge nozzle for clogs by spraying briefly
• To reset the pressure gauge manually

Correct Answer: B

Explanation: A monthly visual inspection ensures the extinguisher is properly charged, not obstructed, and has no visible damage.

• Which fire classification includes cooking oils and fats typically found in kitchens?
• Class A
• Class B
• Class C
• Class K

Correct Answer: D

Explanation: Class K fires involve cooking oils and fats in appliances like deep fryers and require a specialized extinguishing agent.

• What is the fundamental difference between a dry chemical extinguisher and a wet chemical

extinguisher?

• Wet chemical is cheaper to produce
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