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Which type of building material 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 exposure 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 exposure to fire? - (answer)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? - (answer)Gypsum wallboard
What is a concern about lath and plaster during a fire? - (answer)Conceals hidden fire and adds
fuel to the fire
Which statement best 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 stand board (OSB)
Which type of building material can potentially be harmful to firefighters because it contains a
glue called formaldehyde that gives off a hazardous gas when it is heated? - (answer)Particle
board
,When should firefighters begin considering the potential that a building will collapse? -
(answer)During pre-incident surveys and size up
Which type of building collapse is common for Type V construction building? - (answer)Walls
collapsing inward
Why can abandon buildings pose great danger of fire and collapse? - (answer)The interior may
be gutted and altered
In which stage of fire development does structure collapse become likely due to its weakened
state of structural members and build up of water? - (answer)Decay
How do a buildings contents affect fire growth and structural collapse? - (answer)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: - (answer)The
structure is retaining water and is at risk of collapse
What is an indicator of structural collapse? - (answer)Distorted structural members
, When establishing collapse zones: - (answer)The apparatus must not be positioned in the
collapse zone
Traditionally how large is the collapse zone? - (answer)One and a half times the height of the
structure
When should a collapse zone be establish at a structure fire? - (answer)Once a defensive strategy
is adopted
Once it is determined that collapse is imminent - (answer)The collapse zone should be cleared as
soon as possible
What should take place immediately after the collapse zone is cleared? - (answer)Personal
accountability report
Which statement accurately describes how building materials and configuration affect fire
behavior in a structure? - (answer)The longer the fire has burned, the more likely it is that
structural integrity has been compromised