Mixed Deck — All FE Topics Flashcards

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

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.

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

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.

Which of the following is a primary responsibility of fire safety regulations?

Answer: Ensure proper emergency exits and alarm systems are in place

A primary responsibility of fire safety regulations is to ensure proper emergency exits and alarm systems are in place. These regulations aim to protect human life and property by mandating essential safety features that facilitate safe evacuation and early fire detection. This proactive approach is fundamental to minimizing harm during a fire incident.

Why should ABC dry chemical extinguishers generally NOT be used in a restaurant kitchen to suppress a grease fire?

Answer: ABC dry chemical does not cool the oil and the fire can re-ignite; wet chemical is required

ABC dry chemical can momentarily knock down the flames but does not cool the oil below its ignition temperature, allowing the fire to re-ignite.

What is the primary reason clean agent (Halotron I, FM-200) extinguishers are preferred over CO2 for occupied server rooms?

Answer: Clean agents are effective at lower concentrations that are safer for occupants who may still be present

Clean agents suppress fires at concentrations below human safety thresholds, whereas CO2 at extinguishing concentrations is immediately dangerous to life.

When should fire extinguisher location signs be used?

Answer: Whenever the extinguisher is not readily visible from normal approaches

Location signs are required whenever the extinguisher is not immediately visible from normal approaches to the area.

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

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.

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

Answer: Carbon dioxide (CO2)

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

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

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.

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

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.

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

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.

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

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.

Under NFPA 10, what minimum information must be recorded during a monthly visual inspection?

Answer: Date of inspection and the inspector's identity at minimum

Monthly visual inspection records must include at minimum the date and the identity of the person who performed the inspection.

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

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.

According to NFPA 10, what is the maximum travel distance to a fire extinguisher for Class A hazards in a light-hazard occupancy?

Answer: 75 feet

NFPA 10 specifies a maximum travel distance of 75 feet to a fire extinguisher for Class A hazards in light-hazard occupancies.

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

Answer: The life of the extinguisher

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

What is considered a major hazard during a fire risk assessment?

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.

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

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.

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

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.

What is a key limitation of using CO2 extinguishers outdoors?

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.