CH 16 Flashcards
Which type of building material is affected by size and moisture content during fire conditions? (783) [5.3.2]
A. Glass
B. Wood
C. Masonry
D. Concrete
B. Wood
How does the size of a wooden structural member affect how it reacts to fire? (783) [5.3.2]
A. Size has no effect on how easy a piece of wood will ignite.
B. Heavy timbers remain strong even after exposure to direct flame.
C. Heavy timbers lose structural stability quickly when exposed to direct flame.
D. Engineered wood products burn slower than natural wood because they have a lower moisture content.
B. Heavy timbers remain strong even after exposure to direct flame.
How does heat affect masonry? (784) [5.3.2]
A. Bricks may experience spalling when they are heated.
B. Bricks will crumble after minimal exposure to heat and flame.
C. Stones and concrete will crumble after exposure to direct flame.
D. Stones and concrete may experience spalling when they are heated.
D. Stones and concrete may experience spalling when they are heated.
Cast iron may crack or shatter when it is: (786) [5.3.2]
A. heated indirectly.
B. rapidly cooled with water.
C. in contact with direct flames.
D. used as a decorative structural element.
B. rapidly cooled with water.
When heated, steel structural members tend to: (787) [5.3.2]
A. spall.
B. crumble.
C. elongate and push walls outward.
D. contract and cause walls to fall inward.
C. elongate and push walls outward.
Which factor is likely to affect the speed with which a steel structural member fails under fire conditions? (787) [5.3.2]
A. Age
B. Size
C. Exposure to foam extinguishing agents
D. Where the steel is located in the structure
B. Size
How does reinforced concrete react to exposure to fire? (790) [5.3.2]
A. It takes longer to fail after exposure to fire.
B. It contracts and forces building walls inward.
C. It elongates and pushes building walls outward.
D. It performs well, but can lose strength through spalling.
D. It performs well, but can lose strength through spalling.
Which type of building material is used to protect other materials because its moisture content gives it excellent heat resistance? (790) [5.3.2]
A. Reinforced steel
B. Lath and plaster
C. Gypsum wallboard
D. Reinforced concrete
C. Gypsum wallboard
What is a concern about lath and plaster during a fire? (790) [5.3.2]
A. Stretches when heated
B. Releases toxic gases when heated
C. Shows signs of spalling when exposed to fire
D. Conceals hidden fires and adds fuel to the fire
D. Conceals hidden fires and adds fuel to the fire
Which statement describes how glass will react under fire conditions? (791) [5.3.2]
A. Heated glass may crack when water is applied.
B. Glass can add a significant amount of fuel to the fire.
C. It will break or melt, causing the surrounding walls to weaken.
D. Glass generally is not affected by fire conditions, but may be broken during forcible entry.
A. Heated glass may crack when water is applied.
Which type of building material can produce toxic gases and rapidly deteriorate under fire conditions? (793) [5.3.2]
A. Steel
B. Glass
C. Lath and plaster
D. Oriented strand board (OSB)
D. 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? (794) [5.3.2]
A. Plywood
B. Cellulose
C. Mineral wool
D. Particle board
D. Particle board
When should firefighters begin considering the potential that a building will collapse? (794) [5.3.2]
A. During preincident surveys and size-up
B. Once the fire reaches the growth stage
C. Immediately upon arrival at the incident
D. Once the fire reaches the fully involved stage
A. During preincident surveys and size-up
Which type of collapse is common for a Type V construction building? (795) [5.3.2]
A. Balloon collapse
B. Walls collapsing inward
C. Collapse of a single compartment
D. Walls collapsing in one piece or crumbling
B. Walls collapsing inward
Why can abandoned buildings pose great danger of fire and collapse? (797) [5.3.2]
A. The interior may be gutted and altered.
B. The interior may be compartmentalized.
C. The exterior may be made of lightweight components.
D. The exterior may be covered with flammable materials.
A. The interior may be gutted and altered.
In which stage of fire development does structural collapse become likely due to the weakened state of structural members and buildup of water? (797) [5.3.2]
A. Incipient
B. Growth
C. Fully developed
D. Decay
D. Decay
How do a building’s contents affect fire growth and structural collapse? (798) [5.3.2]
A. Contents create barriers that help block fire spread.
B. Contents can retain water and increase the stress on structural members.
C. Contents help distribute the weight in the building evenly, which adds structural stability.
D. Contents burn more slowly than structural members, so it takes longer for the fire to grow.
B. Contents can retain water and increase the stress on structural members.
Little or no water runoff from the interior of the structure can be an indicator that: (798) [5.3.2]
A. fire suppression was effective.
B. fire suppression was not effective.
C. the structure is retaining water and at risk of collapse.
D. the structure is stable, because the fire has been put out.
C. the structure is retaining water and at risk of collapse.
What is an indicator of structural collapse? (798) [5.3.2]
A. Fire in the incipient stage
B. Distorted structural members
C. Absence of reinforcing tie rods
D. Smoke movement through windows
B. Distorted structural members
When establishing collapse zones,: (798) [53.2]
A. apparatus must not be positioned in the collapse zone.
B. the size of the collapse zone depends on the width of the building.
C. interior crews should be allowed to finish tasks before exiting the structure.
D. the IC should wait to cordon the zones off until an offensive strategy has been adopted.
A. apparatus must not be positioned in the collapse zone.
Traditionally, how large is the collapse zone? (798) [5.3.2]
A. 1 1/2 times the width of the structure
B. 2 1/2 times the width of the structure
C. 1 1/2 times the height of the structure
D. 2 1/2 times the height of the structure
C. 1 1/2 times the height of the structure
When should a collapse zone be established at a structure fire? (799) [5.3.2]
A. After mutual aid is requested
B. As soon as interior operations begin
C. Once a defensive strategy is adopted
D. Before cordoning off the hot, warm, and cold zones
C. Once a defensive strategy is adopted
Once it is determined that collapse is imminent,: (799) [5.3.2]
A. the collapse zone should be cleared as soon as possible.
B. the interior crews should remain working until they recover all victims.
C. the primary search must be completed, and then the building should be evacuated.
D. everyone who is not directly related in suppression or rescue must leave the collapse zone.
A. the collapse zone should be cleared as soon as possible.
What should take place immediately after the collapse zone is cleared? (799) [5.3.2]
A. Size-up
B. After-action report
C. Personnel accountability report
D. Personnel return to the staging area
C. Personnel accountability report
