RESIDENTIAL CONTRACTOR ALL QUESTIONS AND
ANSWERS SET A+
✔✔What is fill concrete? - ✔✔moderate to lightweight
✔✔Group I moderate lightweight concrete uses ________. - ✔✔expanded aggregates
such as pearlite, vermiculite, etc.
✔✔Group III moderate lightweight concrete uses ________. - ✔✔air voids obtained with
preformed foam
✔✔Color control cement is ________. - ✔✔used in architectural concrete
✔✔Blended cement contains ________. - ✔✔portland, fly ash, slag, hydrated lime
✔✔Masonry cement is ________. - ✔✔used for stucco
✔✔Expansive cement ________. - ✔✔produced shrinkage compensating concrete
✔✔Over-sanded sand is ________. - ✔✔fine, aggregate, requires more water mixture
that is hard to finish
✔✔Under-sanded sand is ________. - ✔✔a course aggregate what will allow excessive
bleeding and harsh finish
✔✔The disadvantage of manufactured sand is ________. - ✔✔usually the cause of
over-sanded or under-sanded aggregates
✔✔The three different sizes of aggregate are ________. - ✔✔fine, medium, and coarse
✔✔What are the limitations of aggregate? - ✔✔only allows the lesser of 1/4 space
between side forms, 3/4 the space between rebar, 1/3 depths of a slab on a ground
, ✔✔The purpose of add mixture in concrete is temperature, hydration, and ________. -
✔✔curing time
✔✔Hi-range water reducers are commonly known as ________ and reduce the water
needed by 30%. - ✔✔super plasticizers
✔✔________ delays setting and hardening of concrete in hot weather and is used when
pumping long distances or when pouring special finishing techniques such as aggregate
driveways and sidewalks. - ✔✔retarding agents
✔✔________ speeds the rate of hydration for cement and shortens the normal time of
setting in cold weather. - ✔✔accelerators
✔✔________ is the intentional introduction of air in the form of minute, disconnected
bubbles during mixing of portland cement to improve desirable characteristics and can
improve freeze/thaw cycles. - ✔✔air entraining agents
✔✔Fly ash is ________. - ✔✔a by-product of a combustion of pulverized coal in electric
power generating plant
✔✔Vibration soil compaction method uses ________. - ✔✔high frequency vibration
applied to the soil through a steel plate
✔✔When should you never pour a concrete foundation during bad weather? - ✔✔never
place concrete mix on a frozen sub-grade
✔✔The three foundation considerations are ________. - ✔✔type and size of structure,
surface and sub-surface affects the foundation design, structures will settle over time
unless built on rock
✔✔Sometimes ________ or ________ are necessary foundation placements. - ✔✔piles
or piers
✔✔Deep-bearing foundation type is ________. - ✔✔for tall, heavy buildings with deep
basements and heavy columns
✔✔Wall footings are ________. - ✔✔continuous slab strip at the bottom of a wall with a
width larger than the wall thickness
✔✔Isolated columns ________. - ✔✔consist of a rectangular or square slab of constant
thickness
ANSWERS SET A+
✔✔What is fill concrete? - ✔✔moderate to lightweight
✔✔Group I moderate lightweight concrete uses ________. - ✔✔expanded aggregates
such as pearlite, vermiculite, etc.
✔✔Group III moderate lightweight concrete uses ________. - ✔✔air voids obtained with
preformed foam
✔✔Color control cement is ________. - ✔✔used in architectural concrete
✔✔Blended cement contains ________. - ✔✔portland, fly ash, slag, hydrated lime
✔✔Masonry cement is ________. - ✔✔used for stucco
✔✔Expansive cement ________. - ✔✔produced shrinkage compensating concrete
✔✔Over-sanded sand is ________. - ✔✔fine, aggregate, requires more water mixture
that is hard to finish
✔✔Under-sanded sand is ________. - ✔✔a course aggregate what will allow excessive
bleeding and harsh finish
✔✔The disadvantage of manufactured sand is ________. - ✔✔usually the cause of
over-sanded or under-sanded aggregates
✔✔The three different sizes of aggregate are ________. - ✔✔fine, medium, and coarse
✔✔What are the limitations of aggregate? - ✔✔only allows the lesser of 1/4 space
between side forms, 3/4 the space between rebar, 1/3 depths of a slab on a ground
, ✔✔The purpose of add mixture in concrete is temperature, hydration, and ________. -
✔✔curing time
✔✔Hi-range water reducers are commonly known as ________ and reduce the water
needed by 30%. - ✔✔super plasticizers
✔✔________ delays setting and hardening of concrete in hot weather and is used when
pumping long distances or when pouring special finishing techniques such as aggregate
driveways and sidewalks. - ✔✔retarding agents
✔✔________ speeds the rate of hydration for cement and shortens the normal time of
setting in cold weather. - ✔✔accelerators
✔✔________ is the intentional introduction of air in the form of minute, disconnected
bubbles during mixing of portland cement to improve desirable characteristics and can
improve freeze/thaw cycles. - ✔✔air entraining agents
✔✔Fly ash is ________. - ✔✔a by-product of a combustion of pulverized coal in electric
power generating plant
✔✔Vibration soil compaction method uses ________. - ✔✔high frequency vibration
applied to the soil through a steel plate
✔✔When should you never pour a concrete foundation during bad weather? - ✔✔never
place concrete mix on a frozen sub-grade
✔✔The three foundation considerations are ________. - ✔✔type and size of structure,
surface and sub-surface affects the foundation design, structures will settle over time
unless built on rock
✔✔Sometimes ________ or ________ are necessary foundation placements. - ✔✔piles
or piers
✔✔Deep-bearing foundation type is ________. - ✔✔for tall, heavy buildings with deep
basements and heavy columns
✔✔Wall footings are ________. - ✔✔continuous slab strip at the bottom of a wall with a
width larger than the wall thickness
✔✔Isolated columns ________. - ✔✔consist of a rectangular or square slab of constant
thickness
