CH5-CH8

.rtf

School

Fayetteville Technical Community College *

*We aren’t endorsed by this school

Course

220

Subject

Chemistry

Date

Feb 20, 2024

Type

rtf

Pages

Uploaded by CommodoreIce4708

DF Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. Which of the following BEST describes how understanding the physical science of fire can help firefighters? A. It keeps radiant heat from igniting fuel. B. It keeps flaming combustion from beginning. C. It translates into practical knowledge of fire behavior. D. It helps in stopping rapid fire behavior from developing. ____ 2. Which of the following terms refers to a substance remaining chemically the same, but changing in size, shape or appearance? A. Chemical shift B. Physical change C. Chemical reaction D. Parallel alteration ____ 3. When a substance changes from one type of matter to another, it has had a: A. chemical shift. B. physical change. C. chemical reaction. D. physical alteration. ____ 4. Which of the following represents the amount of energy that an object can release in the future? A. Kinetic B. Thermal C. Potential D. Mechanical ____ 5. The energy possessed by a moving object is called: A. kinetic energy. B. thermal energy. C. potential energy. D. mechanical energy. ____ 6. The potential chemical energy of fuel in fire behavior is converted to: A. sound energy. B. thermal energy. C. electrical energy. D. mechanical energy. ____ 7. What type of reaction absorbs energy as it occurs? A. Kinetic B. Potential C. Exothermic D. Endothermic

____ 8. What type of reaction releases energy in the form of heat and sometimes light? A. Kinetic B. Potential C. Exothermic D. Endothermic ____ 9. The process of ignition causes pyrolysis in solid fuels and ___ in liquid fuels. A. melting B. freezing C. vaporization D. kinetic reaction ____ 10. What is the most common form of ignition? A. Piloted B. Exothermic C. Endothermic D. Autoignition ____ 11. What mode of combustion produces a smoldering glow in a material’s surface? A. Kinetic B. Flaming C. Potential D. Nonflaming ____ 12. In what mode of combustion is a visible flame produced? A. Kinetic B. Flaming C. Potential D. Nonflaming ____ 13. What are the elements necessary to create fire in the model represented by the fire triangle? A. Fuel, oxygen, heat B. Heat, fuel, ignition C. Passive agents and heat D. Oxygen and passive agents ____ 14. Which of the following BEST describes what the fire tetrahedron represents? A. A transfer of sound energy B. The process of autoignition C. An uninhibited chemical chain reaction D. The relationship between fuel, oxygen, heat ____ 15. What type of combustion occurs when burning is localized on or near a fuel’s surface? A. Flaming B. Exothermic C. Nonflaming D. Endothermic ____ 16. What product of combustion may heat adjacent fuels, making them susceptible to ignition?

A. Toxic smoke B. Thermal energy C. Hydrogen cyanide D. Carbon monoxide ____ 17. What product of combustion causes the most fire deaths? A. Toxic smoke B. Thermal energy C. Carbon dioxide D. Hydrogen cyanide ____ 18. What product of combustion is the most common product in structure fires? A. Toxic smoke B. Thermal energy C. Hydrogen cyanide D. Carbon monoxide ____ 19. Which of the following BEST describes why firefighters must use SCBA during overhaul? A. Smoke is not like other flammable gases; it will not burn or explode. B. Hazardous concentrations of smoke are only present outside the structure. C. Hazardous concentrations are typically below short-term exposure limits. D. Volume and density of smoke may be reduced, but the hazard is not eliminated. ____ 20. Which of the following BEST describes kinetic energy transfer? A. It does not move at all. B. It moves from one substance to another, no matter what the temperature. C. It moves from low-temperature to high-temperature substances. D. It moves from high-temperature to low-temperature substances. ____ 21. What source of thermal energy is the most common source of heat in combustion reactions? A. Radiant energy B. Electrical energy C. Chemical energy D. Mechanical energy ____ 22. Which of the following sources of energy is a form of oxidation? A. Sparking B. Self-heating C. Resistance heating D. Spontaneous ignition ____ 23. What method of electrical energy occurs when a high-temperature luminous discharge crosses a gap? A. Arcing B. Sparking C. Overcurrent D. Resistance heating ____ 24. What method of heat transfer occurs when a material is heated as the result of direct contact with a heat source?

A. Potential B. Radiation C. Conduction D. Convection ____ 25. What heat transfer method usually occurs through movement of hot smoke and fire gases? A. Potential B. Radiation C. Conduction D. Convection ____ 26. What method of heat transfer can become the dominant mode as the fire grows in size? A. Potential B. Radiation C. Conduction D. Convection ____ 27. Which of the following BEST describes the influence of exposed surfaces on radiant heat? A. Creating a vacuum will stop radiant heat. B. Materials that reflect radiated energy help increase radiant heat. C. Dark materials emit and absorb heat more effectively than light materials. D. Temperature differences between the heat source and exposed surface have no impact. ____ 28. Which type of fuel does not contain carbon? A. Simple B. Organic C. Reactive D. Inorganic ____ 29. Which of the following terms is the total amount of energy released when a specific amount of fuel is burned? A. Thermal energy B. Chemical energy C. Heat release rate D. Heat of combustion ____ 30. Heat release rate is usually expressed in which of the following measurements? A. Kilowatts (kW) B. Kilojoules/gram (kJ/g) C. British thermal unit (Btu) D. Kilowatts per meter squared (kW/m 2 ) ____ 31. What type of fuel can be the most dangerous of all the types? A. Solid B. Liquid C. Gaseous D. Chemical

____ 32. What type of fuel has mass and volume but no definite shape? A. Solid B. Liquid C. Gaseous D. Chemical ____ 33. Liquids with a specific gravity of less than 1 will: A. turn into vapor. B. turn into solid. C. float on the surface. D. sink below the surface. ____ 34. Which of the following BEST describes what vapor pressure indicates? A. How easily a substance will evaporate B. How long it takes a substance to evaporate C. What form the substance will take in a container D. What direction a substance will take when released from a container ____ 35. Which of the following terms is the minimum temperature at which a liquid gives off sufficient vapors to ignite, but still not sustain combustion? A. Fire point B. Flash point C. Vapor point D. Pressure point ____ 36. What term is used to describe the extent to which a substance will mix with water? A. Solubility B. Mixability C. Volatility D. Reactivity ____ 37. What type of fuel has a definite size and shape? A. Solid B. Liquid C. Gaseous D. Chemical ____ 38. Which of the following terms is used to refer to the process that can generate sufficient quantities of burnable vapors to ignite in the presence of a sufficient oxidizer? A. Pyrolysis B. Fire point C. Flash point D. Vapor pressure ____ 39. Fuel particles become smaller as the ratio of surface-to-mass: A. increases. B. decreases. C. stays constant. D. fluctuates back and forth.

____ 40. The primary oxidizing agent in most fires is: A. carbon. B. oxygen. C. nitrogen. D. hydrogen. ____ 41. Which of the following BEST describes the impact of higher oxygen concentration on combustion? A. Materials burn more intensely. B. Fires may be easier to extinguish. C. Nonflaming combustion is extinguished. D. Materials that do not burn at normal levels still do not burn. ____ 42. What term defines the minimum concentration of fuel vapor and air that supports combustion? A. Vaporization B. Vapor pressure C. Lower flammable limit D. Upper flammable limit ____ 43. Which of the following BEST describes the complete oxidation of methane? A. It produces water. B. It produces carbon dioxide. C. It produces oxygen and water. D. It produces carbon dioxide and water. ____ 44. Which of the following BEST describes the impact of an extinguishing agent when trying to extinguish flaming combustion? A. It forms an unstable product. B. It speeds the combustion reaction. C. It interferes with the chemical reaction. D. It burns more oxygen in a short amount of time. ____ 45. Which of the following fire development factors affects heat release rate? A. Fuel type B. Ventilation C. Compartment volume and ceiling height D. Availability and location of additional fuel ____ 46. What fire development factor is based on considering how the volume of air will impact radiated heat in a fire? A. Fuel type B. Ambient conditions C. Compartment volume and ceiling height D. Availability and location of additional fuel ____ 47. What form of compartment fire is controlled by the availability of oxygen and the configuration of fuel? A. Uncontrolled B. Fuel-controlled

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help