Fire Safety Flashcards

Under NFPA 1, what is the required minimum aisle width in assembly occupancies for areas with more than 50 seats?

Answer: 44 inches

NFPA 1 and Life Safety Code require a minimum 44-inch aisle width in assembly occupancies to ensure safe egress.

What is the primary hazard associated with a backdraft explosion?

Answer: Sudden introduction of oxygen to a superheated oxygen-deficient fire environment

A backdraft occurs when oxygen is suddenly introduced into a smoldering, oxygen-deficient fire, causing an explosive ignition.

In the Incident Command System (ICS), who is directly responsible for the safety of all personnel on the fireground?

Answer: Safety Officer

The Safety Officer has the authority to halt unsafe operations and is responsible for monitoring and ensuring personnel safety.

A standpipe system classified as Class II is designed primarily for use by:

Answer: Trained building occupants using small hose stations

Class II standpipes provide 1½-inch hose stations for use by trained building occupants for initial attack before firefighters arrive.

Which of the following best describes a 'two-in, two-out' rule under OSHA 29 CFR 1910.134?

Answer: Two firefighters enter and two remain outside for rescue if needed before an interior attack

The two-in, two-out rule requires that at least two firefighters remain outside in standby rescue mode whenever two or more enter an IDLH atmosphere.

What is the purpose of positive pressure ventilation (PPV) in firefighting?

Answer: To push smoke and heat out of a structure by pressurizing it at the entry point

PPV uses a blower at the entry to pressurize the structure and push smoke and heat out through an exhaust opening, improving visibility and conditions.

When inspecting a fire extinguisher, which condition requires it to be removed from service immediately?

Answer: The pull pin is missing or broken

A missing or broken pull pin means the extinguisher could discharge accidentally or fail to operate in an emergency.