Concrete Flatwork Tech and Flatwork Finisher (3rd Ed.) Actual
Questions with Detailed Answers
Question 1.
(Ch. 1, #1) It is important that the _______ _______ read and understand project
specifications
Correct Answer: finishing foreman
Question 2.
(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.
Correct Answer: 100
Question 3.
(Ch 1, #3) True or False: Concrete is sold by the ton.
Correct Answer: False (sold by volume)
Question 4.
(Ch. 1, #4) Delays in discharging concrete trucks can result in the concrete being hard to:
Correct Answer: pump, place, and finish
Question 5.
(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.
Correct Answer: A) 407.41; B) 297
Question 6.
(Ch. 1, #6) When there is room for two concrete trucks ready to discharge into a pump
hopper, placement is faster because:
Correct Answer: as one truck is finishing, the other is ready to unload concrete
,Question 7.
(Ch. 1, #7) Concrete from a ready mix truck must be completely discharged within ____
hours after water has been added at the plant.
Correct Answer: 1.5
Question 8.
(Ch. 1, #8) You can tell when water was added to the concrete truck by looking at the:
Correct Answer: batch ticket
Question 9.
(Ch. 1, #9) When concrete for a slab placement will be discharged from the truck chute,
truck arrivals should usually be spaced about:
Correct Answer: 15 minutes
Question 10.
(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.
Correct Answer: True
Question 11.
(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.
Correct 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.)
Question 12.
(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 _________ __________.
Correct Answer: preconstruction conference
, Question 13.
(Ch. 2, #1) True or False: Concrete made with portland cement will set and harden while
underwater.
Correct Answer: True
Question 14.
(Ch. 2, #2) If a concrete slab on ground won't be exposed to sulfates, the cement used is
most likely to be:
Correct Answer: Type I
Question 15.
(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.
Correct Answer: portland
Question 16.
(Ch. 2, #4) Most concrete used in slabs on ground has course aggregate with a maximum
size of:
Correct Answer: 0.75 to 1.5 in. (19 to 38 mm.)
Question 17.
(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.
Correct Answer: True
Question 18.
(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.
Correct Answer: False (Too many small particles will *in- crease* the amount of
water needed to make the concrete workable.)
Question 19.
(Ch. 2, #7) All concrete that will be subject to freezing when moist or be exposed to
deicing salts should contain:
Correct Answer: an air-entraining agent
Questions with Detailed Answers
Question 1.
(Ch. 1, #1) It is important that the _______ _______ read and understand project
specifications
Correct Answer: finishing foreman
Question 2.
(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.
Correct Answer: 100
Question 3.
(Ch 1, #3) True or False: Concrete is sold by the ton.
Correct Answer: False (sold by volume)
Question 4.
(Ch. 1, #4) Delays in discharging concrete trucks can result in the concrete being hard to:
Correct Answer: pump, place, and finish
Question 5.
(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.
Correct Answer: A) 407.41; B) 297
Question 6.
(Ch. 1, #6) When there is room for two concrete trucks ready to discharge into a pump
hopper, placement is faster because:
Correct Answer: as one truck is finishing, the other is ready to unload concrete
,Question 7.
(Ch. 1, #7) Concrete from a ready mix truck must be completely discharged within ____
hours after water has been added at the plant.
Correct Answer: 1.5
Question 8.
(Ch. 1, #8) You can tell when water was added to the concrete truck by looking at the:
Correct Answer: batch ticket
Question 9.
(Ch. 1, #9) When concrete for a slab placement will be discharged from the truck chute,
truck arrivals should usually be spaced about:
Correct Answer: 15 minutes
Question 10.
(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.
Correct Answer: True
Question 11.
(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.
Correct 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.)
Question 12.
(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 _________ __________.
Correct Answer: preconstruction conference
, Question 13.
(Ch. 2, #1) True or False: Concrete made with portland cement will set and harden while
underwater.
Correct Answer: True
Question 14.
(Ch. 2, #2) If a concrete slab on ground won't be exposed to sulfates, the cement used is
most likely to be:
Correct Answer: Type I
Question 15.
(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.
Correct Answer: portland
Question 16.
(Ch. 2, #4) Most concrete used in slabs on ground has course aggregate with a maximum
size of:
Correct Answer: 0.75 to 1.5 in. (19 to 38 mm.)
Question 17.
(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.
Correct Answer: True
Question 18.
(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.
Correct Answer: False (Too many small particles will *in- crease* the amount of
water needed to make the concrete workable.)
Question 19.
(Ch. 2, #7) All concrete that will be subject to freezing when moist or be exposed to
deicing salts should contain:
Correct Answer: an air-entraining agent
