chapter 4: Fire dynamics verified to pass 2023/2024

chapter 4: Fire dynamicsifsta chpt 4 : fire dynamics test questions (75) - correct answer ifsta chpt. 4 : fire Dynamics test answers What may occur if water is added to a burning liquid that is less dense than water? - correct answer the water may disperse the burning liquid instead of extinguishing it. How does the self-sustained chemical reaction influence the oxidation reaction in flaming combustion? - correct answer Increases the ratio of complete to incomplete combustion of fuel Which type of electrical heating occurs when the current flowing through a conductor exceeds its design limits? - correct answer overcurrent or overload What will a liquid with a specific gravity less than one do when combined with water - correct answer float To ensure that the decay stage of a ventilation-limited fire is the fire's final stage, firefighters must provide a controlled transition of a fire in the decay stage from ventilation-limited to fuel-limited, by: - correct answer cooling the hot fire gases before the ventilation occurs. What occurs during flashover? - correct answer the volume of burning gases can increase to fill the rooms entire volume and extend out of any openings from the room. In a compartment fire, smoke flashover indicators include rapidly increasing volume, turbulence, optical density, and: - correct answer darkening color in the fire environment convection usually involves the transfer of heat through - correct answer the movement of hot smoke and fire gases