Chapter 4 FF2 Please enter your email: 1. Which of the following BEST describes when structural collapse may occur? It can occur when all the factors are met. It can only occur before fire suppression. It can occur well after the fire is extinguished. It can only occur during fire suppression. 2. In what fire stage is structural collapse very likely? Growth Fully developed Decay Incipient 3. A collapse zone for a Type IV structure should be established when: its veneer begins to curtain collapse. it has been determined that glass shards will be directed at on-scene personnel. the structure has been weakened by repeated fires over time. walls begin to shift because the building is twisting. 4. What is the most effective defense against heavy content fuel loading? Restricting the types of combustible materials used Not allowing the use of combustible materials in construction Adopting local standards that limit multistory buildings Proper inspection and code enforcement 5. Fuel loading is defined as the maximum heat produced if: all combustible materials in a given area burn. none of the combustible materials in a given area burn. no combustible materials are present. nothing but combustible materials are present. 6. How much is added to the weight of floors for every U.S. gallon (SI liter) used during suppression? 6.25 pounds (2.83 kilograms) 8.33 pounds (3.69 kilograms) 10.22 pounds (4.63 kilograms) 5.22 pounds (2.37 kilograms) 7. Vertical tactical ventilation can be defined as channeling smoke from the: point in a building that has the least windows. highest point in a building. lowest point in a building. point in a building that has the most windows. 8. Knowing types of doors and door hardware can help firefighters: predict fire development. select the right type of vertical tactical ventilation. judge roof safety. select correct forcible entry tools. 9. Which of the following must be considered when deciding the size of a collapse zone? Number of personnel on-scene Local adopted building codes Type of building construction and safest location for personnel Number of personnel on-scene and type of building construction 10. The critical temperature for steel trusses is: 300°F (149°C). 500°F (260°C). 1,000°F (538°C) 900°F (482°C). 11. Which of the following BEST describes a possible construction hazard? Furnishings may contribute to fire spread. Danger increases because occupants and belongings remain in one part of the building while work goes on in the other. Fire detection systems may be damaged. The building is subject to rapid fire spread because protective features are not in place. 12. Which of the following BEST describes a primary dangerous building condition? Conditions that allow tactical ventilation Conditions that contribute to fire spread Conditions that suppress fire Conditions that permit occupants to safely escape 13. A collapse zone must be established when: mortar between masonry shows no sign of deterioration. there is no evidence of structural instability. furnishings and finishes do not overwhelm fire suppression systems. a defensive strategy has been adopted. 14. Which type of roof is used whenever large open floor spaces with limited interior support is needed? Sawtooth Lantern Mansard Bowstring truss 15. Which of the following BEST describes where the collapse zone is established? Near any area that is 20 feet (6.09 m) from exterior walls Adjacent to any exposed exterior walls Near any area that is 10 feet (3.04 m) from exterior walls Adjacent to any exposed interior walls 16. When a collapse is imminent, personnel ___ in the collapse zone. should never work are allowed to work may stay for twenty minutes may cautiously place an unstaffed master stream 17. Renovation, age of the structure, weather, and loads are all: structural collapse factors. renovations hazards. building construction hazards. impossible to estimate the impact of on a structure. 18. For which type of construction is flying glass the primary collapse zone hazard concern? Type V Type III Type IV Type I 19. When exposed to temperatures above ___ unprotected steel will expand and twist. 900°F (482°C) 500°F (260°C) 1,000°F (538°C) 300°F (149°C) Loading … Question 1 of 19
