Across
- 3. a colorless odorless gas and one of the compositions of air which is approximately 21% by volume.
- 6. the chemical process whereby fire consumes the most solid part of the fuel.
- 8. or the fighting element of the presence or danger of fire.
- 9. a passage hall or ante chamber between the outer doors and the interior parts of a house or
- 13. chipping or pitting of concrete or masonry surfaces.
- 15. science that deals with the study of matter and energy and their mutual interactions.
- 18. rough flame those having unsteady, irregular swirls and eddies.
- 20. a normally open device installed inside an air duct system which automatically closes to restrict the passage of smoke or fire.
- 24. transfer of heat through physical movement of materials and occurs only in liquids and gases.
- 26. heat is transferred by direct contact and the rate of transfer is dependent on factors.
- 29. in the form of light and heat.
- 30. occurs when solid fuels are not capable of producing enough gas during pyrolysis to sustain a flame.
- 33. intentional or malicious destruction of property by fire.
- 36. the mechanism in which fire can spread from its origin to other sources of fuel.
- 38. a form of energy generated by the transmission of some other form of energy, as in combustion or burning.
- 39. the lowest temperature at which liquid fuel produces a flammable vapor.
- 40. produce a rapid drop in temperature of the immediate surroundings.
- 42. can generate temperatures high enough to ignite any combustible materials near the heated area.
- 45. a reddish orange in color it deposits soot because it is a product of incomplete combustion it has lower temperature.
- 47. the density of the vapor relative to the density of air and is calculated by dividing the molecular weight of the gas by that of air.
- 49. excludes the oxygen from the fuel so that the gases or vapors of the fuel cannot ignite and continue the combustion.
- 50. the temperature at which a material is not hot enough to keep burning but still gives off enough vapors to cause a flame to flash across the surface.
- 51. means slowing down the rate of burning.
- 52. fire caused naturally without human intervention or aid such as lightning spontaneous ignition and mechanical malfunction of equipment.
- 53. a building unsafe in case of fire because it will burn easily or because it lacks adequate exits or fire escapes.
Down
- 1. a four sided solid geometric figure that resembles a pyramid with one of the sides forming the base.
- 2. rapid burning which can be considered a slow explosion but travels at a lesser speed than a detonation.
- 4. can occur when vapors dust of gases premixed with appropriate amount of air are ignited.
- 5. descriptive of any material which by its nature or because of its reaction with other
- 7. the ease at which a material can be ignited.
- 10. is the science that deals with the study of matter which treats of the structure composition and properties of substances and of the transformations which they undergo.
- 11. any act that would remove or neutralize fire hazard.
- 12. descriptive of any substance that ignites spontaneously when exposed to air.
- 14. amount of fuel vapor that can be mixed with air to form an explosive or flammable mixture.
- 16. it is the transmission of heat through an object or medium or conductor such as pipe metal hot air duct wire or even wall.
- 17. exothermic reaction involving the oxidation of some substance such fuel resulting in the release of
- 19. any material or mixture consisting of a fuel and oxidizer used to set off explosives.
- 21. a return to flaming combustion after incomplete extinguishment of a fire reigning at some time after being put out
- 22. melting or fusing of metallic ores or compounds to separate impurities from pure metals.
- 23. the mechanism in which fire can spread from its origin to other sources of fuel.
- 25. any liquid which causes fire when in contact with organic matter or with certain chemicals.
- 27. the use of one or more electrical appliances or devices which draw or consume electrical current beyond the designed capacity of the existing electrical system.
- 28. a kind of stable explosive compound which explodes by percussion.
- 31. the purpose for which a building or portion thereof is used or intended to be used.
- 32. a piece of metal or an electrical conductor used to bypass a safety device in an electrical system.
- 34. any substance which reacts chemically with oxygen and produces flames.
- 35. finely powdered substance which when mixed with air in the proper proportion and ignited will cause an explosion.
- 37. any visual or audible signal produced by a device or system to warn the occupants of the
- 41. luminous body of a burning gas which gets hotter and less luminous when mixed with more oxygen.
- 43. sequence of exothermic chemical reaction between fuel and an oxidant accompanied by the production of heat and conversion of chemical species.
- 44. heat is transferred if the form of electromagnetic energy directly from one object to another.
- 46. a chemical change in which combustible material such fuel and an oxidizing agent react.
- 48. a device used for making a connection when threads do not match or when they are different in sizes.