Concrete Flatwork Finisher – Placement, Finishing, and
Floor Flatness Exam Questions
Description:
This document contains exam questions and answers for Concrete Flatwork
Technician and Finisher certification. It covers concrete placement, truck discharge
timing, finishing tools, slump control, subbase preparation, curing, reinforcement
placement, and floor flatness measurement. It also explains F-number systems and
proper finishing techniques to avoid cracking and curling.
(Ch. 1, #1) It is important that the _______ _______ read and understand project
specifications - answer✔✔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. - answer✔✔100 (Ch 1, #3) True or False: Concrete is sold by
the ton. - answer✔✔False (sold by volume) (Ch. 1, #4) Delays in discharging
concrete trucks can result in the concrete being hard to: - answer✔✔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
1
factor. B) Metric: For a concrete floor slab that is 150 mm thick, 60 m long, and 30 m
Page
,wide you should order ____ m^3 of concrete, assuming a 10% waste factor. -
answer✔✔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: -
answer✔✔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. - answer✔✔1.5 (Ch. 1, #8) You can
tell when water was added to the concrete truck by looking at the: -
answer✔✔batch ticket (Ch. 1, #9) When concrete for a slab placement will be
discharged from the truck chute, truck arrivals should usually be spaced about: -
answer✔✔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 worker
output. - answer✔✔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. -
answer✔✔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 _________ __________. -
2
Page
, answer✔✔preconstruction conference (Ch. 2, #1) True or False: Concrete made
with portland cement will set and harden while underwater. - answer✔✔True (Ch.
2, #2) If a concrete slab on ground won't be exposed to sulfates, the cement used is
most likely to be: - answer✔✔Type I (Ch. 2, #3) Fly ash may be added to concrete
from a fly ash silo at the batch plant or from a silo containing a _______ cement. -
answer✔✔portland (Ch. 2, #4) Most concrete used in slabs on ground has course
aggregate with a maximum size of: - answer✔✔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. - answer✔✔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. - answer✔✔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: - answer✔✔an air-entraining agent (Ch. 2, #8) Strength of normal weight
concrete depends mainly on: - answer✔✔water-cement ratio (Ch. 2, #9) True or
False: Oversanded concrete mixtures are likely to produce floors with poor wear
resistance and excessive shrinkage. - answer✔✔True (Ch. 2, #10) To minimize
shrinkage and reduce cracking and curling: - answer✔✔Use as much coarse
aggregate as possible, as little mixing water as possible, and use aggregates with low
3
shrinkage. (Ch. 2, #11) Changes in concrete slump most often represent changes in
Page
Floor Flatness Exam Questions
Description:
This document contains exam questions and answers for Concrete Flatwork
Technician and Finisher certification. It covers concrete placement, truck discharge
timing, finishing tools, slump control, subbase preparation, curing, reinforcement
placement, and floor flatness measurement. It also explains F-number systems and
proper finishing techniques to avoid cracking and curling.
(Ch. 1, #1) It is important that the _______ _______ read and understand project
specifications - answer✔✔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. - answer✔✔100 (Ch 1, #3) True or False: Concrete is sold by
the ton. - answer✔✔False (sold by volume) (Ch. 1, #4) Delays in discharging
concrete trucks can result in the concrete being hard to: - answer✔✔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
1
factor. B) Metric: For a concrete floor slab that is 150 mm thick, 60 m long, and 30 m
Page
,wide you should order ____ m^3 of concrete, assuming a 10% waste factor. -
answer✔✔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: -
answer✔✔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. - answer✔✔1.5 (Ch. 1, #8) You can
tell when water was added to the concrete truck by looking at the: -
answer✔✔batch ticket (Ch. 1, #9) When concrete for a slab placement will be
discharged from the truck chute, truck arrivals should usually be spaced about: -
answer✔✔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 worker
output. - answer✔✔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. -
answer✔✔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 _________ __________. -
2
Page
, answer✔✔preconstruction conference (Ch. 2, #1) True or False: Concrete made
with portland cement will set and harden while underwater. - answer✔✔True (Ch.
2, #2) If a concrete slab on ground won't be exposed to sulfates, the cement used is
most likely to be: - answer✔✔Type I (Ch. 2, #3) Fly ash may be added to concrete
from a fly ash silo at the batch plant or from a silo containing a _______ cement. -
answer✔✔portland (Ch. 2, #4) Most concrete used in slabs on ground has course
aggregate with a maximum size of: - answer✔✔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. - answer✔✔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. - answer✔✔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: - answer✔✔an air-entraining agent (Ch. 2, #8) Strength of normal weight
concrete depends mainly on: - answer✔✔water-cement ratio (Ch. 2, #9) True or
False: Oversanded concrete mixtures are likely to produce floors with poor wear
resistance and excessive shrinkage. - answer✔✔True (Ch. 2, #10) To minimize
shrinkage and reduce cracking and curling: - answer✔✔Use as much coarse
aggregate as possible, as little mixing water as possible, and use aggregates with low
3
shrinkage. (Ch. 2, #11) Changes in concrete slump most often represent changes in
Page
