ACI CONCRETE ACTUAL TEST PAPER
COMPLETE QUESTIONS AND SOLUTIONS
TESTED ANSWERS
◉ True
Answer: (Ch. 4, #5) True or False: F(l) numbers are indicators of
levelness or tilt of the floor surface.
◉ Floating, restraightening, troweling
Answer: (Ch. 4, #6) Which finishing operations affect floor flatness?
◉ flat but not level
Answer: (Ch. 4, #7) A floor with an F(f) value of 48 and an F(l) value
of 16 is:
◉ a lot of finishing effort needed to get a high F(f) number floor
Answer: (Ch. 4, #8) A 3-in. (75mm)-slump concrete that sets very
fast is most likely to result in:
◉ 24; 72
,Answer: (Ch. 4, #9) F-number testing should preferably be done
within ____ hours after concrete placement, but never later than ____
hours after concrete placement.
◉ True
Answer: (Ch. 4, #10) True or False: A floor with an F(f) number of
40 is twice as flat as a floor with an F(f) number of 20.
◉ False (Measurements after 72 hours may reflect other influences,
such as slab curling, that affect flatness or levelness but are beyond
the finisher's control.)
Answer: (Ch. 4, #11) True or False: Floor flatness measurements
taken more than 72 hours after concrete placement are the best
measure of the finishers' skills.
◉ 10 to 20 ft (3 to 6 m) apart
Answer: (Ch. 4, #12) The highest quality of levelness can be
achieved by using hard edge forms spaced:
◉ Trucks must drive over sidewalks, curbs, or driveways; Slab
reinforcing bars are supported by chairs; truck tires leave deep ruts
in the subgrade or granular base.
Answer: (Ch. 5, #1) If the ready mix truck can be driven into the slab
placement area, chuting concrete directly into the forms is usually
, the easiest and most economical placing method. This may not be
possible when:
◉ cracking
Answer: (Ch. 5, #2) Although placing concrete directly from the
truck is economical, getting the truck to the discharge point may
require driving it over curbs, or on sidewalks or driveways. To avoid
________ of the curbs, sidewalks, or driveways, earth ramps may need
to be built.
◉6
Answer: (Ch. 5, #3) When guiding a concrete truck near a 6-ft (2 m)-
deep excavation, the truck wheels closest to the excavation should
be ____ ft (m) or more away from the edge of the excavation.
◉ True
Answer: (Ch. 5, #4) True or False: When the concrete truck chutes
won't reach the forms, the concrete supplier must approve adding
more chutes supported off the truck.
◉ plywood ramp
Answer: (Ch. 5, #5) Manual or motorized buggies can be used to
transport concrete from the truck mixer to the point of deposit, but a
temporary ________ ________ is usually needed to prevent the buggies
from riding directly on any reinforcing bars.
COMPLETE QUESTIONS AND SOLUTIONS
TESTED ANSWERS
◉ True
Answer: (Ch. 4, #5) True or False: F(l) numbers are indicators of
levelness or tilt of the floor surface.
◉ Floating, restraightening, troweling
Answer: (Ch. 4, #6) Which finishing operations affect floor flatness?
◉ flat but not level
Answer: (Ch. 4, #7) A floor with an F(f) value of 48 and an F(l) value
of 16 is:
◉ a lot of finishing effort needed to get a high F(f) number floor
Answer: (Ch. 4, #8) A 3-in. (75mm)-slump concrete that sets very
fast is most likely to result in:
◉ 24; 72
,Answer: (Ch. 4, #9) F-number testing should preferably be done
within ____ hours after concrete placement, but never later than ____
hours after concrete placement.
◉ True
Answer: (Ch. 4, #10) True or False: A floor with an F(f) number of
40 is twice as flat as a floor with an F(f) number of 20.
◉ False (Measurements after 72 hours may reflect other influences,
such as slab curling, that affect flatness or levelness but are beyond
the finisher's control.)
Answer: (Ch. 4, #11) True or False: Floor flatness measurements
taken more than 72 hours after concrete placement are the best
measure of the finishers' skills.
◉ 10 to 20 ft (3 to 6 m) apart
Answer: (Ch. 4, #12) The highest quality of levelness can be
achieved by using hard edge forms spaced:
◉ Trucks must drive over sidewalks, curbs, or driveways; Slab
reinforcing bars are supported by chairs; truck tires leave deep ruts
in the subgrade or granular base.
Answer: (Ch. 5, #1) If the ready mix truck can be driven into the slab
placement area, chuting concrete directly into the forms is usually
, the easiest and most economical placing method. This may not be
possible when:
◉ cracking
Answer: (Ch. 5, #2) Although placing concrete directly from the
truck is economical, getting the truck to the discharge point may
require driving it over curbs, or on sidewalks or driveways. To avoid
________ of the curbs, sidewalks, or driveways, earth ramps may need
to be built.
◉6
Answer: (Ch. 5, #3) When guiding a concrete truck near a 6-ft (2 m)-
deep excavation, the truck wheels closest to the excavation should
be ____ ft (m) or more away from the edge of the excavation.
◉ True
Answer: (Ch. 5, #4) True or False: When the concrete truck chutes
won't reach the forms, the concrete supplier must approve adding
more chutes supported off the truck.
◉ plywood ramp
Answer: (Ch. 5, #5) Manual or motorized buggies can be used to
transport concrete from the truck mixer to the point of deposit, but a
temporary ________ ________ is usually needed to prevent the buggies
from riding directly on any reinforcing bars.
