ACI FLATWORK EXAM REVIEW SHEET
WITH PRACTICE QUESTIONS AND
COMPLETE SOLUTIONS GRADED A+
⩥ If the crew can place and finish 100 yd3 of concrete per hour, the
producer's delivery rate should be about _____ yd3 per hour.
Answer: 100
⩥ Concrete is sold by the ton?
Answer: False
⩥ Delays in discharging concrete trucks can result in the concrete being
hard to:
Answer: pump, place, and finish
⩥ When there is room for two concrete trucks ready to discharge into a
pump hopper, placement is faster because:
Answer: as 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.
Answer: 1.5
,⩥ You can tell when water has been added to the concrete truck by
looking at the:
Answer: batch ticket
⩥ When concrete for a slab placement will be discharged from the truck
chute, truck arrivals should usually be spaced at about:
Answer: 15 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.
Answer: True
⩥ 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.
Answer: False
⩥ The question, "What finisher or finishers can request addition of water
to the concrete truck on site?" should be answered at the ______
_________.
Answer: Pre-construction meeting
, ⩥ Concrete made with portland cement will set and harden while under
water.
Answer: True
⩥ If a concrete slab on ground won't be exposed to sulfates, the cement
used is most likely to be:
Answer: Type I
⩥ Most concrete used in slabs on ground has coarse aggregate with a
maximum size of:
Answer: 3/4 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.
Answer: True
⩥ Increasing the amount of sand in a concrete usually decreases the
amount of water needed to make the concrete workable.
Answer: False
⩥ All concrete that will be subject to freezing when moist or be exposed
the deicing salts should contain:
WITH PRACTICE QUESTIONS AND
COMPLETE SOLUTIONS GRADED A+
⩥ If the crew can place and finish 100 yd3 of concrete per hour, the
producer's delivery rate should be about _____ yd3 per hour.
Answer: 100
⩥ Concrete is sold by the ton?
Answer: False
⩥ Delays in discharging concrete trucks can result in the concrete being
hard to:
Answer: pump, place, and finish
⩥ When there is room for two concrete trucks ready to discharge into a
pump hopper, placement is faster because:
Answer: as 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.
Answer: 1.5
,⩥ You can tell when water has been added to the concrete truck by
looking at the:
Answer: batch ticket
⩥ When concrete for a slab placement will be discharged from the truck
chute, truck arrivals should usually be spaced at about:
Answer: 15 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.
Answer: True
⩥ 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.
Answer: False
⩥ The question, "What finisher or finishers can request addition of water
to the concrete truck on site?" should be answered at the ______
_________.
Answer: Pre-construction meeting
, ⩥ Concrete made with portland cement will set and harden while under
water.
Answer: True
⩥ If a concrete slab on ground won't be exposed to sulfates, the cement
used is most likely to be:
Answer: Type I
⩥ Most concrete used in slabs on ground has coarse aggregate with a
maximum size of:
Answer: 3/4 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.
Answer: True
⩥ Increasing the amount of sand in a concrete usually decreases the
amount of water needed to make the concrete workable.
Answer: False
⩥ All concrete that will be subject to freezing when moist or be exposed
the deicing salts should contain:
