Chapter 16 Building Materials, Structural Collapse and Effects of Fore Suppression well solved

Chapter 16 Building Materials, Structural Collapse and Effects of Fore SuppressionWhich building materials is the most common in North America and is the main component of many structural assemblies? - correct answer Wood When masonry components like brick and stone are exposed to fine and high temperatures; - correct answer There is little effect on the masonry The effect of heat and fire on metal depends on the; - correct answer Type of metal and whether or not it is covered. What is the primary material used for structural support in the construction of large buildings? - correct answer Steel Due to its high water content,______ has excellent heat-resistant and fire-retardant properties. - correct answer Gypsum Which building material is not typically used for structural support? - correct answer Glass Which type of building material can be highly combustible and produce toxic gasses when exposed to fire? - correct answer Engineered wood products In a _____ building, structural collapse is unlikely but will usually be localized instead of structure-wide if it does occur. - correct answer Type I Fires in the ____ stage do not generate sufficient heat or flame to cause unprotected steel or wood frame buildings to collapse. - correct answer Incipient Contents of a building: - correct answer Can cause collapse more rapidly due to added dead weight. Which is an indicator of structural instability or impending structural collapse? - correct answer Sagging, spongy roof When should collapse zones be established? - correct answer When there is an indication that the structure has been weakened by prolonged exposure to fire or heat. What should interior crews do first when structural collapse is likely or imminent? - correct answer Exit the building and inform command. Which is a true statement about factors that affect the fire spread? - correct answer Open floor plans and less compartmentation may contribute to fire spread. Other than fire suppression, which fire-ground activity can greatly affect a structure's chance of collapse? - correct answer Overhaul Which type of building materials is affected by size and moisture content during fire conditions? - correct answer Wood How does the size of a wooden structural member affect how it reacts to fire? - correct answer Heavy timbers remain strong even after exposed to direct flame. How does heat affect masonry? - correct answer Stones and concrete may experience spalling when they are heated Cast iron may crack or shatter when it is: - correct answer rapidly cooled with water When heated, steel structural members tend to: - correct answer Elongate and push walls outward Which factor is likely to affect the speed with which a steel structural member fails under fire conditions? - correct answer Size