AIC FINAL EXAM PREP QUESTIONS AND ANSWERS.
Rebar - CORRECT ANSWER hot rolled, ribbed, round rods of steed that are typically shipped in 60' lengths that are then cut, bent, and shaped into limitless configurations
sized based on diameter in eighths of an inch
EX. #5 bar has a diameter of 5/8"...
AIC FINAL EXAM PREP QUESTIONS
AND ANSWERS.
Rebar - CORRECT ANSWER hot rolled, ribbed, round rods of steed that are typically shipped in 60'
lengths that are then cut, bent, and shaped into limitless configurations
sized based on diameter in eighths of an inch
EX. #5 bar has a diameter of 5/8"
Fiber Reinforcement - CORRECT ANSWER steel, fiberglass, synthetic, or natural fibers added in the
concrete mix to increase strength, control cracking, and/or improve freeze-thaw resistance in concrete.
Welded Wire Fabrics - CORRECT ANSWER grids of wire spaced 2 to 12 inches apart, welded together
and fabricated into sheets or rolls for ease of use
sizing of welded wire fabric is designated based on its grid spacing in inches and wire size in cross
sectional area of hundredths of a square in
EX: 6x6 W1.4/1.4 has a grid spacing of 6 inches and a wire cross sectional area of 1.4 hundredths of a
square inch
Pre and Post-tension - CORRECT ANSWER system where steel cables are placed in the concrete and put
in tension
when cables are in tension, they put a compressive load on the concrete which counteracts the
concretes tensile loads
pre-tension means the cables were put in tension before the concrete is cured whereas with post-
tension they are put in tension after
Air Entraining - CORRECT ANSWER improves concretes ability to resist freeze/thaw cycles and increase
workability of wet concrete
commonly used in cold weather climates
Water Reducers - CORRECT ANSWER increases workability of wet concrete without the addition of
water
commonly used in concrete overlays and patching
,Accelerators - CORRECT ANSWER decreases the curing time of concrete
commonly used to reduce setting time in cold weather applications
Superplasticizers - CORRECT ANSWER increase the fluidity of concrete without adding additional water
commonly used for applications requiring very high slump, such as heavily reinforced structures
Retarders - CORRECT ANSWER slows the curing time of concrete
commonly used in hot weather to reduce the effects of high temperature on curing
Type 1 Cement - General Purpose - CORRECT ANSWER common cement
Type 2 Cement - Moderate Sulfate Resistance - CORRECT ANSWER used when concrete is in contact
with water that has a moderate sulfate concentration
Type 3 Cement - High Early - CORRECT ANSWER can cure faster and reaches its design strength in a
shorter period of time
often used for elevated decks so crews can begin working on the next floor faster
Type 1A, 2A, and 3A Cement - Air Entraining - CORRECT ANSWER improves resistance to freeze/thaw
cycles
Type 4 Cement - Low Heat of Hydration - CORRECT ANSWER controls the heat of hydration
curing process of concrete is a chemical reaction with this cement and water called hydration
this reaction is exothermic (it creates heat)
cement is used when the rate and amount of heat during hydration needs to be minimized
Type 5 Cement - High Sulfate Resistance - CORRECT ANSWER used when in contact with water with high
sulfate concentrations
,Concrete - CORRECT ANSWER Strong in compression
Weak in tension and shear
weighs 150 pcf
cures 28 days
General use 3,000 - 5,000 psi
High-Strength 6,000 - 20,000 psi
Masonry - CORRECT ANSWER Brick, block, stone held together with mortar
Natural (stone)
Man Made (concrete blocks)
most common = CMU
Nominal = 8"x8"x16"
Actual = 7 5/8"x7 5/8"x15 5/8"
3/8" Mortar Joint
Bond Patterns - CORRECT ANSWER Running Bond, Stacked Bond, Common Bond, English Bond, Flemish
Bond
Grout - CORRECT ANSWER Highly fluid mixture of cement, sand, and water used to fill CMU cores and
encase reinforcement
Mortar - CORRECT ANSWER buttered on the side of the unit and is used to secure masonry units
together
Type M Mortar - CORRECT ANSWER Highest strength & below grade
used in high load areas and when the masonry is below grade
Type S Mortar - CORRECT ANSWER High strength & below grade
used with normal to moderate loads and when the masonry is below grade
, Type N Mortar - CORRECT ANSWER General purpose with normal loading
used with normal loading and above grade application
Type O Mortar - CORRECT ANSWER Low strength and Non-Load Bearing
easy to use and appropriate to prepare walls that are still structurally sound or interior and non-load
bearing system
Steel - CORRECT ANSWER mostly iron & < 2% carbon
high carbon = hard/brittle
low carbon = soft/weak
universally high tensile and compressive strength; also good in shear
Structural Steel Sizing - CORRECT ANSWER W8x18
8 in tall
18lb per linear foot
Soil - CORRECT ANSWER a composition of organic and inorganic solids, water, an air
classified by category (cohesive, cohesion-less, organic) or OSHA type
Cohesive Soils - CORRECT ANSWER small particle size, stick together (clay)
Cohesionless Soils - CORRECT ANSWER do not stick together (gravel, sand, silt)
OSHA Type - Stable Rock - CORRECT ANSWER natural, solid, remain intact while exposed
OSHA Type - Type A - CORRECT ANSWER highest strength greater than or equal to 1.5 ton/sqft
described as undisturbed cohesive soils with an unconfined compressive strength
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