1 for specific request mail
ACI Certification: Concrete Flatwork Tech and
Flatwork Finisher (2nd Ed.) Questions and Correct
Answers | Latest Update
(Ch. 1, #1) It is important that the _______ _______ read and understand
project specifications
Ans: finishing foreman
(Ch. 1, #2) If the crew can place and finish 100yd^3 (m^3) of concrete per
hour, the producer's rate should be about ____ yd^3(m^3) per hour.
Assignment Expert
Ans: 100
(Ch 1, #3) True or False: Concrete is sold by the ton.
Guru01 - Stuvia
Ans: False (sold by volume)
(Ch. 1, #4) Delays in discharging concrete trucks can result in the
2026
concrete being hard to:
Ans: pump, place, and finish
©
(Ch. 1, #5)
A) Inch/Pound: For a concrete floor slab that is 6 in. thick, 200ft long,
and 100 ft wide you should order ____ yd^3 of concrete, assuming a 10%
waste factor.
B) Metric: For a concrete floor slab that is 150 mm thick, 60 m long, and
30 m wide you should order ____ m^3 of concrete, assuming a 10% waste
factor.
Ans: A) 407.41; B) 297
(Ch. 1, #6) When there is room for two concrete trucks ready to discharge
into a pump hopper, placement is faster because:
, 2 for specific request mail
Ans: as one truck is finishing, the other is ready to unload concrete
(Ch. 1, #7) Concrete from a ready mix truck must be completely
discharged within ____ hours after water has been added at the plant.
Ans: 1.5
(Ch. 1, #8) You can tell when water was added to the concrete truck by
looking at the:
Ans: batch ticket
(Ch. 1, #9) When concrete for a slab placement will be discharged from
Assignment Expert
the truck chute, truck arrivals should usually be spaced about:
Guru01 - Stuvia
Ans: 15 minutes
(Ch. 1, #10) True or False: 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
2026
worker output.
©
Ans: True
(Ch. 1, #11) True or False: In deciding how much concrete to order for a
floor placement, you should calculate the number of cubic yards (cubic
meters) needed to fill the forms, then order two or three cubic yards
(cubic meters) less so you don't waste concrete that is not needed.
Ans: False (Standard is to order 10% to 15% more than measured volume
for small orders and 5 to 10% more than measured volume for large
orders to account for subgrade settlement, uneven subgrade, spillage,
and waste.)
(Ch. 1, #12) The question "What finisher or finishers can request the
addition of water to the concrete truck on site?" Should be answered at
the _________ __________.
, 3 for specific request mail
Ans: preconstruction conference
(Ch. 2, #1) True or False: Concrete made with portland cement will set
and harden while underwater.
Ans: True
(Ch. 2, #2) If a concrete slab on ground won't be exposed to sulfates, the
cement used is most likely to be:
Ans: Type I
(Ch. 2, #3) Fly ash may be added to concrete from a fly ash silo at the
Assignment Expert
batch plant or from a silo containing a _______ cement.
Guru01 - Stuvia
Ans: portland
(Ch. 2, #4) Most concrete used in slabs on ground has course aggregate
with a maximum size of:
2026
Ans: 0.75 to 1.5 in. (19 to 38 mm.)
(Ch. 2, #5) True or False: 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 sieves.
Ans: True
(Ch. 2, #6) True or False: Increasing the amount of sand in a concrete
usually decreases the amount of water needed to make the concrete
workable.
Ans: False (Too many small particles will increase the amount of water
needed to make the concrete workable.)
(Ch. 2, #7) All concrete that will be subject to freezing when moist or be
exposed to deicing salts should contain:
Ans: an air-entraining agent
ACI Certification: Concrete Flatwork Tech and
Flatwork Finisher (2nd Ed.) Questions and Correct
Answers | Latest Update
(Ch. 1, #1) It is important that the _______ _______ read and understand
project specifications
Ans: finishing foreman
(Ch. 1, #2) If the crew can place and finish 100yd^3 (m^3) of concrete per
hour, the producer's rate should be about ____ yd^3(m^3) per hour.
Assignment Expert
Ans: 100
(Ch 1, #3) True or False: Concrete is sold by the ton.
Guru01 - Stuvia
Ans: False (sold by volume)
(Ch. 1, #4) Delays in discharging concrete trucks can result in the
2026
concrete being hard to:
Ans: pump, place, and finish
©
(Ch. 1, #5)
A) Inch/Pound: For a concrete floor slab that is 6 in. thick, 200ft long,
and 100 ft wide you should order ____ yd^3 of concrete, assuming a 10%
waste factor.
B) Metric: For a concrete floor slab that is 150 mm thick, 60 m long, and
30 m wide you should order ____ m^3 of concrete, assuming a 10% waste
factor.
Ans: A) 407.41; B) 297
(Ch. 1, #6) When there is room for two concrete trucks ready to discharge
into a pump hopper, placement is faster because:
, 2 for specific request mail
Ans: as one truck is finishing, the other is ready to unload concrete
(Ch. 1, #7) Concrete from a ready mix truck must be completely
discharged within ____ hours after water has been added at the plant.
Ans: 1.5
(Ch. 1, #8) You can tell when water was added to the concrete truck by
looking at the:
Ans: batch ticket
(Ch. 1, #9) When concrete for a slab placement will be discharged from
Assignment Expert
the truck chute, truck arrivals should usually be spaced about:
Guru01 - Stuvia
Ans: 15 minutes
(Ch. 1, #10) True or False: 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
2026
worker output.
©
Ans: True
(Ch. 1, #11) True or False: In deciding how much concrete to order for a
floor placement, you should calculate the number of cubic yards (cubic
meters) needed to fill the forms, then order two or three cubic yards
(cubic meters) less so you don't waste concrete that is not needed.
Ans: False (Standard is to order 10% to 15% more than measured volume
for small orders and 5 to 10% more than measured volume for large
orders to account for subgrade settlement, uneven subgrade, spillage,
and waste.)
(Ch. 1, #12) The question "What finisher or finishers can request the
addition of water to the concrete truck on site?" Should be answered at
the _________ __________.
, 3 for specific request mail
Ans: preconstruction conference
(Ch. 2, #1) True or False: Concrete made with portland cement will set
and harden while underwater.
Ans: True
(Ch. 2, #2) If a concrete slab on ground won't be exposed to sulfates, the
cement used is most likely to be:
Ans: Type I
(Ch. 2, #3) Fly ash may be added to concrete from a fly ash silo at the
Assignment Expert
batch plant or from a silo containing a _______ cement.
Guru01 - Stuvia
Ans: portland
(Ch. 2, #4) Most concrete used in slabs on ground has course aggregate
with a maximum size of:
2026
Ans: 0.75 to 1.5 in. (19 to 38 mm.)
(Ch. 2, #5) True or False: 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 sieves.
Ans: True
(Ch. 2, #6) True or False: Increasing the amount of sand in a concrete
usually decreases the amount of water needed to make the concrete
workable.
Ans: False (Too many small particles will increase the amount of water
needed to make the concrete workable.)
(Ch. 2, #7) All concrete that will be subject to freezing when moist or be
exposed to deicing salts should contain:
Ans: an air-entraining agent
