ACI Flatwork Exam Questions &
Answers
It is important that the ____________ __________ read and understand project specifications. -
ANSWERSfinisher foreman
If the crew can place and finish 100 yd3 of concrete per hour, the producer's delivery rate
should be about _____ yd3 per hour. - ANSWERS100
Concrete is sold by the ton? - ANSWERSFalse
Delays in discharging concrete trucks can result in the concrete being hard to: - ANSWERSpump,
place, and finish
When there is room for two concrete trucks ready to discharge into a pump hopper, placement
is faster because: - ANSWERSas one truck is finishing, the other is ready to unload the concrete
Concrete from a ready mix truck must usually be completely discharged within _____ hours
after water has been added at the plant. - ANSWERS1.5
You can tell when water has been added to the concrete truck by looking at the: -
ANSWERSbatch ticket
When concrete for a slab placement will be discharged from the truck chute, truck arrivals
should usually be spaced at about: - ANSWERS15 minutes
, When finishers get behind because the concrete is setting faster than expected and the placing
crew is also shorthanded, one solution is slowing the concrete delivery rate to match worker
output. - ANSWERSTrue
In deciding how much concrete to order for a floor placement, you should calculate the number
of cubic yards needed to fill the forms, then order two to three cubic yards less so you don't
waste concrete that is not needed. - ANSWERSFalse
The question, "What finisher or finishers can request addition of water to the concrete truck on
site?" should be answered at the ______ _________. - ANSWERSPre-construction meeting
Concrete made with portland cement will set and harden while under water. - ANSWERSTrue
If a concrete slab on ground won't be exposed to sulfates, the cement used is most likely to be: -
ANSWERSType I
Most concrete used in slabs on ground has coarse aggregate with a maximum size of: -
ANSWERS3/4 to 1 1/2 in.
Sand for concrete used in slabs on ground is easier to finish when it has close to the largest
allowable amount of material passing the No. 50 and No. 100 sieve. - ANSWERSTrue
Increasing the amount of sand in a concrete usually decreases the amount of water needed to
make the concrete workable. - ANSWERSFalse
All concrete that will be subject to freezing when moist or be exposed the deicing salts should
contain: - ANSWERSan air-entraining agent
Strength of normal weight concrete depends mainly on: - ANSWERSwater-cement ratio
Answers
It is important that the ____________ __________ read and understand project specifications. -
ANSWERSfinisher foreman
If the crew can place and finish 100 yd3 of concrete per hour, the producer's delivery rate
should be about _____ yd3 per hour. - ANSWERS100
Concrete is sold by the ton? - ANSWERSFalse
Delays in discharging concrete trucks can result in the concrete being hard to: - ANSWERSpump,
place, and finish
When there is room for two concrete trucks ready to discharge into a pump hopper, placement
is faster because: - ANSWERSas one truck is finishing, the other is ready to unload the concrete
Concrete from a ready mix truck must usually be completely discharged within _____ hours
after water has been added at the plant. - ANSWERS1.5
You can tell when water has been added to the concrete truck by looking at the: -
ANSWERSbatch ticket
When concrete for a slab placement will be discharged from the truck chute, truck arrivals
should usually be spaced at about: - ANSWERS15 minutes
, When finishers get behind because the concrete is setting faster than expected and the placing
crew is also shorthanded, one solution is slowing the concrete delivery rate to match worker
output. - ANSWERSTrue
In deciding how much concrete to order for a floor placement, you should calculate the number
of cubic yards needed to fill the forms, then order two to three cubic yards less so you don't
waste concrete that is not needed. - ANSWERSFalse
The question, "What finisher or finishers can request addition of water to the concrete truck on
site?" should be answered at the ______ _________. - ANSWERSPre-construction meeting
Concrete made with portland cement will set and harden while under water. - ANSWERSTrue
If a concrete slab on ground won't be exposed to sulfates, the cement used is most likely to be: -
ANSWERSType I
Most concrete used in slabs on ground has coarse aggregate with a maximum size of: -
ANSWERS3/4 to 1 1/2 in.
Sand for concrete used in slabs on ground is easier to finish when it has close to the largest
allowable amount of material passing the No. 50 and No. 100 sieve. - ANSWERSTrue
Increasing the amount of sand in a concrete usually decreases the amount of water needed to
make the concrete workable. - ANSWERSFalse
All concrete that will be subject to freezing when moist or be exposed the deicing salts should
contain: - ANSWERSan air-entraining agent
Strength of normal weight concrete depends mainly on: - ANSWERSwater-cement ratio
