IFSTA Exam Chapter 16 Solved 100%

Which building materials is the most common in North America and is the main component of many structural assemblies? - ANSWER-Wood When masonry components like brick and stone are exposed to fine and high temperatures; - ANSWER-There is little effect on the masonry The effect of heat and fire on metal depends on the; - 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? - ANSWER-Steel Due to its high water content,______ has excellent heat-resistant and fire-retardant properties. - ANSWER-Gypsum Which building material is not typically used for structural support? - ANSWER-Glass Which type of building material can be highly combustible and produce toxic gasses when exposed to fire? - ANSWER-Engineered wood products In a _____ building, structural collapse is unlikely but will usually be localized instead of structure-wide if it does occur. - ANSWER-Type I Fires in the ____ stage do not generate sufficient heat or flame to cause unprotected steel or wood frame buildings to collapse. - ANSWER-Incipient Contents of a building: - ANSWER-Can cause collapse more rapidly due to added dead weight. Which is an indicator of structural instability or impending structural collapse? - ANSWER-Sagging, spongy roof When should collapse zones be established? - 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? - ANSWER-Exit the building and inform command. Which is a true statement about factors that affect the fire spread? - 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? - ANSWER-Overhaul Which type of building materials is affected by size and moisture content during fire conditions? - ANSWER-Wood How does the size of a wooden structural member affect how it reacts to fire? - ANSWER-Heavy timbers remain strong even after exposed to direct flame. How does heat affect masonry? - ANSWER-Stones and concrete may experience spalling when they are heated Cast iron may crack or shatter when it is: - ANSWER-rapidly cooled with water When heated, steel structural members tend to: - ANSWER-Elongate and push walls outward Which factor is likely to affect the speed with which a steel structural member fails under fire conditions? - ANSWER-Size How does reinforced concrete react to exposed to fire? - ANSWER-It performs well, but cab lose strength through spalling. Which type of building material is used to protect other materials because its moisture content gives it excellent heat resistance? - ANSWER-gypsum wallboard What is a concern about lath and plaster during a fire? - ANSWER-Conceals hidden fires and adds fuel to the fire Which statement describes how glass will react under fire conditions? - ANSWER-Heated glass may crack when water is applied. Which type of building material can produce toxic gases and rapidly deteriorate under fire conditions? - ANSWER-Oriented strand board (OSB) Which building material can potentially be harmful to firefighters because it contains a glue called urea formaldehyde that gives off a hazardous gas when it is heated? - ANSWER-Particle Board When should firefighters begin considering the potential that a budding will collapse? - ANSWER-During preincident surveys and size-up. Which type of collapse is common for a Type V construction building? - ANSWER-Walls collapsing inward Why can abandoned buildings pose great danger of fire and collapse? - ANSWER-The interior may be gutted and altered.