IFSTA 7 - Chapter 4 - Fire Dynamics question n answers graded A+ 2023/2024

IFSTA 7 - Chapter 4 - Fire Dynamics If there are no openings for lateral movement during the growth stage of a fire, the hot gases released during combustion will fill the compartment: swirling radiant current. ing at the ceiling and filling down. rmly as the room pressure equalizes. d and downward from the neutral plane. - correct answer b. starting at the ceiling and filling down. Which stage of fire occurs when all combustible materials in the compartment are burning at their peak heat release rate based on the available oxygen? a.Decay b.Incipient c.Growth d.Fully developed - correct answer d. Fully developed In order to burn, fuel must be in a _____ state. us a d - correct answer a. gaseous A fuel's _____ is the total amount of thermal energy released when a specific amount of that fuel burns. cal content of combustion ic content of reduction - correct answer b. heat of combustion Which statement about smoke is accurate? a.Smoke is a product of complete combustion. b.Smoke contains a higher concentration of oxygen than air does. c.Smoke has the potential to burn. d.Smoke has a relatively low vapor pressure. - correct answer c. Smoke has the potential to burn. Which element is included in the fire tetrahedron that is not part of the fire triangle model? a.Chemical chain reaction b.Heat c.Fuel d.Oxygen - correct answer a. Chemical chain reaction The range of concentrations of fuel vapor and air within which combustion can occur is the: able (explosive) range. -sustaining range. tion (combustion) range. -burning range. - correct answer a. flammable (explosive) range. Which type of fuel is difficult to extinguish using water as the only extinguishing agent? Select one: a.Miscible liquids b.Liquids that are less dense (lighter) than water c.Polar solvents d.Liquids that are more dense (heavier) than water - correct answer b. Liquids that are less dense (lighter) than water What is the primary consideration affecting how easily solid fuels ignite? a.Specific gravity b.Heat release rate