Exam Questions and Answers | A+ Score
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Know about the common building materials (Wood, Masonry, and Metal.) -
🧠 ANSWER ✔✔- Wood: The most common building material used in North
America & is the main component of many structural assemblies. Size and
moisture content affect how wood reacts to fire conditions.
- Masonry: Includes bricks, stones, & concrete blocks. Fire and exposure to
high temperatures has minimal effect.
- Metal: Metal building materials commonly used include cast iron, steel,
aluminum, and copper. The effect of heat and fire on metal depends on the
type of metal and whether or not the metal is exposed or covered.
How does steel react under fire conditions and how does that effect the
structure of the building? - 🧠 ANSWER ✔✔Steel structural members
,lengthen (elongate) when heated. The elongation tends to push the walls
out. If the steel buckles and fails somewhere in the middle, it tends to pull
walls in.
Know about reinforced concrete, Gypsum, Lath and plaster, &
Glass/fiberglass. - 🧠 ANSWER ✔✔- Reinforced concrete: Concrete can be
poured at the construction site or formed into precast sections and
transported to a site. Internally fortified with steel reinforcement bars
(rebar). Performs well under fire conditions, but can lose strength through
spalling.
- Gypsum: Also known as drywall or sheetrock. Is an inorganic product
from which plaster and wallboards are constructed. Has high water content
that absorbs a great deal of heat as the moisture evaporates.
- Lath & Plaster: construction is a combination of materials. Horizontal
wood strips called lath are nailed to wall studs and covered with a mixture
of plaster to form an interior wall finish. Can be very difficult to penetrate
with axes or hand tools. Walls can also conceal fire within the cavity
between surfaces and add fuel to the fire in the form of the studs and lath.
- Glass/Fiberglass: Glass is not typically used for structural support. Used
in sheet form for doors and windows and in block form for non-load-bearing
, walls. Conventional glass is not an effective barrier to fire extension.
Fiberglass is typically used for insulation and is located between
interior/exterior walls and between ceilings and roofs. The materials used to
bind the fiberglass may be combustible and difficult to extinguish.
Some products used in construction may be highly combustible, produce
significant toxic gases, or can rapidly deteriorate. What are there products?
- 🧠 ANSWER ✔✔- Plywood
- Fiberboard
- Paneling
- Particle board
- Oriented strand board (OSB)
Know about Finger-jointed timber, Laminated timber, MDF, Particle board
and synthetic wood. - 🧠 ANSWER ✔✔- Finger-Jointed Timber: Small pieces
of wood that are joined into longer boards using epoxy resins and glues.
- Laminated Timber: Also known as plywood or glulam (glued laminated)
wood, these materials are sheets of wood often used for roof and floor
decking, walls, and stair treads.
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