FRE 101 CH4 HW Q'S |40 QUESTIONS AND ANSWERS|GUARANTEED SUCCESS

Fire is rapid, self-sustaining __________ process, accompanied by the evolution of heat and light in varying intensities. Oxidation The process of combustion releases heat, which is what kind of reaction? Exothermic Which of the following reactions includes the absorption of heat? Endothermic The fire triangle includes fuel, an oxidizer, and: Energy Adding a fourth component, a chemical chain reaction, to the fire triangle creates which of the following models? Fire tetrahedron What are the basic components to the chemistry fire? Oxidizer and fuel What are the substances that evolve or generate oxygen, either at ambient temperatures or when exposed to heat? Oxidizers What are two of the most common elements in fuels? Carbon and hydrogen Which term describes a situation in which turbulent, heavy, dense, black smoke is being emitted by a fire? Black fire Which of the following is NOT considered a sate of matter for fuel? Combustion Which process converts solid and liquid fuels to the gaseous state by the application of energy? Pyrolysis At what temperature does fuel continue combustion without any external input of heat, becoming self-sustaining? Ignition temperature Which of the following is NOT a factor affecting the rate at which solid fuels are pyrolized? Overall cost Which of the following refers to the grouping of fuel over a prescribed area? Coninuity Which of the following can be absorbed by fuel and affects its ease of ignition? Moisture content The Steiner Tunnel test assesses smoke density and _______ and is mandated for many commercial building materials Flame spread Which of the following refers to the ability of a substance to mix with water? Miscibility Which of the following refers to the weight of a liquid as compared to the weight of an equal volume of water? Specific gravity Which of the following refers to the ease with which a fuel gives off vapors at ambient temperature? Volatility What is the pressure exerted by vapor molecules on the sides of a container at equilibrium? Vapor pressure When the vapor pressure equals atmospheric pressure at the surface of the liquid, what has been reached? Boiling point The relative density of vapor or gas as compared to air is its: Vapor density What is the minimum temperature of a liquid at which it gives of sufficient vapors to form an ignitable mixture with air, although ignition will not be sustained? Flash point Which of the following gas characteristics is the maximum concentration of gas or vapor in air above which it is not possible to ignite vapors? Upper flammable limit Which of the following gas characteristics is the minimum concentration of gas or vapor in the air below which it is not possible to ignite the vapors? Lower flammable limit The proportion of gas or vapor in air between the upper and lower flammable limits is called the: flammable range Which of the following possible sources of heat involves the breaking down and recombination of molecules? Chemical Which of the following sources of heat involves fission and fusion? Nuclear Which of the following methods of heat transfer is the transfer of heat through a medium without visible motion? Conduction The transfer of heat through a circulating medium, such as liquids or gases, is indicative of which of the following methods of heat transfer? Convection The transfer of heat by wavelengths of energy is which of the following methods of heat transfer? Radiation