Chapter 4 Fire Dynamics

Which element is included in the fire tetrahedron tht is not part of the fir triangle model?

• Fuel

• Heat

• Oxygen

• Chemical chain reaction

in order to burn, fuel must be in a _________ state of matter.

• Solid

• Liquid

• Plasma

• Gaseous

Heat transfers from one body to another by three mechanisms: Conduction, Radiation, and :

• Volatility

• Buoyancy

• Convection

• Thermodynamics

Tags

NGSS.HS-PS3-4

What is the primary consideration affecting how easily solid fuels ignite?

• Specific Gravity

• Heat release rate

• Total mass of the fuel

• Surface TO Mass Ratio

The four stages of fire development are:

• incipient, growth, pyrolysis, and decay

• Incipient, growth, fully developed, and decay

• Ignition, incipient, fully developed, and decay

• Ignition, ventilating, fully developed, and decay

If there are no openings for the lateral movement during the growth stage of a fire, the hot gases released during combustion will fill the compartment:

• In swirling radiat currents

• starting at the ceiling and filling down

• uniformly as the room pressure equalizes

• upward and downward from the neutral plane

Tags

NGSS.HS-PS3-4

When a compartment fire is in ventilation-limited decay, ___________ can trigger flashover quickly.

• Introduction of new fuel

• Introduction of new oxygen

• Lowering of the neutral plane

• rapid increase in temperature

What is the cause of most fire deaths?

• Injuries caused by falling materials or structural collapse

• Exposure to toxic gases found in smoke and/or lack of oxygen

• Exposure to extreme heat and/or contact with flames and hot surfaces

• Accidental injuries sustained during escape and/or evacuation procedures

Which product of combustion acts as a chemical asphyxiant by excluding oxygen from the blood, leading to hypoxia of the brain and tissures?

• Carbon Dioxide (CO2)

• Carbon Monoxide (CO)

• Aerpsp;ozed fie; [artoc;es

• Judrpgem Cuamode (HCN)

The transfer of heat through and between solids is known as:

• radiation

• convection

• conduction

• self-heating