CONCRETE FLATWORK TECH AND FLATWORK FINISHER
QUESTIONS AND ANSWERS SURE A+
✔✔Throttle down the machine to avoid moving too much mortar. - ✔✔(Ch. 7, #30) If
you're making float passes with a riding machine and running at full speed, what should
you do when you see that some of the concrete ahead is still wet?
✔✔dry; set - ✔✔(Ch. 7, #31) When only parts of a concrete floor are exposed to the sun
or to wind coming through a door opening, those parts will often _____ and _____
faster.
✔✔backward; edge form - ✔✔(Ch. 7, #32) If concrete at the edges is low during
machine floating, a __________ pass with the float blades or pan over the ______ will
bring more concrete to the edges.
✔✔apply a slight upward pressure on the handle - ✔✔(Ch. 7, #33) To move left with a
walk-behind troweling machine:
✔✔parallel; 2 to 3 - ✔✔(Ch. 7, #34) Where a temporary screed is moved, two different
placements are sometimes made adjacent to each other. When concrete is softer on
one side of the screed's former location, the walk-behind machine should be run
_________ to the seam where the two concretes come together, with the blades
overlapping the seam by about ____ to ____ inches.
✔✔larger; smaller - ✔✔(Ch. 7, #35) When hand floating, float and trowel blades may be
of different sizes, but finishers should always start with the ________ size and then
move to the _________ size.
✔✔1 - ✔✔(Ch. 7, #36) Tilt of a trowel blade is excessive if the leading edge is more
than _____ inch above the concrete surface.
✔✔isolation - ✔✔(Ch. 8, #1) Joints that separate slabs from walls and columns are
called ________ joints.
✔✔Construction - ✔✔(Ch. 8, #2) _____________ joints are stopping places for a day's
work.
✔✔False (both horizontal and vertical movement must be permitted in an isolation joint)
- ✔✔(Ch. 8, #3) True or False: Slabs at isolation joints must be free to move horizontally
but not vertically.
✔✔compressible - ✔✔(Ch. 8, #4) Isolation joint material must be:
, ✔✔False (joint material should extend to the full depth of the joint) - ✔✔(Ch. 8, #5)
Isolation joint material should extend from the top of the slab to one-quarter of the slab
depth.
✔✔minimize random cracks - ✔✔(Ch. 8, #6) Contraction joints:
✔✔True - ✔✔(Ch. 8, #7) True or False: As a general rule, contraction joints that are
spaced closely together are less likely to crack between joints.
✔✔True - ✔✔(Ch. 8, #8) True or False: Reinforcing steel in slabs on ground does not
prevent cracking.
✔✔True - ✔✔(Ch. 8, #9) True or False: Contraction joints are sometimes called control
joints.
✔✔ - ✔✔(Ch. 8, #10)
✔✔feet; 2 to 3; inches - ✔✔(Ch. 8, #11) Spacing of contraction joints is often based on
the rule that the spacing in ______ should be ___ to ___ times the slab thickness in
_______.
✔✔1/4 the slab thickness - ✔✔(Ch. 8, #12) When contraction joints are formed with a
groover, the groover should have a bit deep enough to cut to:
✔✔ravel; random cracking - ✔✔(Ch. 8, #13) If contraction joints are sawed too soon
with a wet-cut saw, the edges of the joint may _______ but if the joints are sawed too
late _________ ________ may occur.
✔✔3rd; 4th; intermediate - ✔✔(Ch. 8, #14) When temperatures are high during the day
and low at night, it's sometimes necessary to saw every _____ or ______ joint before
sawing the __________ joints.
✔✔True - ✔✔(Ch. 8, #15) True or False: During hot weather, it may be possible to saw
contraction joints with wet-cut saws as early as 4 hours after finishing is complete.
✔✔1 hour; 4 hours - ✔✔(Ch. 8, #16) Early-entry, dry-cut saws cut the waiting period
before sawing to as little as ___ ______ in hot weather and about ___ _____ in cold
weather.
✔✔usually cut to a maximum depth of 1.25 inches; should not ride up over hard or large
coarse aggregate; have a skid plate that helps prevent raveling (spalling) at the cut
edges - ✔✔(Ch. 8, #17) Early-entry, dry-cut saws:
QUESTIONS AND ANSWERS SURE A+
✔✔Throttle down the machine to avoid moving too much mortar. - ✔✔(Ch. 7, #30) If
you're making float passes with a riding machine and running at full speed, what should
you do when you see that some of the concrete ahead is still wet?
✔✔dry; set - ✔✔(Ch. 7, #31) When only parts of a concrete floor are exposed to the sun
or to wind coming through a door opening, those parts will often _____ and _____
faster.
✔✔backward; edge form - ✔✔(Ch. 7, #32) If concrete at the edges is low during
machine floating, a __________ pass with the float blades or pan over the ______ will
bring more concrete to the edges.
✔✔apply a slight upward pressure on the handle - ✔✔(Ch. 7, #33) To move left with a
walk-behind troweling machine:
✔✔parallel; 2 to 3 - ✔✔(Ch. 7, #34) Where a temporary screed is moved, two different
placements are sometimes made adjacent to each other. When concrete is softer on
one side of the screed's former location, the walk-behind machine should be run
_________ to the seam where the two concretes come together, with the blades
overlapping the seam by about ____ to ____ inches.
✔✔larger; smaller - ✔✔(Ch. 7, #35) When hand floating, float and trowel blades may be
of different sizes, but finishers should always start with the ________ size and then
move to the _________ size.
✔✔1 - ✔✔(Ch. 7, #36) Tilt of a trowel blade is excessive if the leading edge is more
than _____ inch above the concrete surface.
✔✔isolation - ✔✔(Ch. 8, #1) Joints that separate slabs from walls and columns are
called ________ joints.
✔✔Construction - ✔✔(Ch. 8, #2) _____________ joints are stopping places for a day's
work.
✔✔False (both horizontal and vertical movement must be permitted in an isolation joint)
- ✔✔(Ch. 8, #3) True or False: Slabs at isolation joints must be free to move horizontally
but not vertically.
✔✔compressible - ✔✔(Ch. 8, #4) Isolation joint material must be:
, ✔✔False (joint material should extend to the full depth of the joint) - ✔✔(Ch. 8, #5)
Isolation joint material should extend from the top of the slab to one-quarter of the slab
depth.
✔✔minimize random cracks - ✔✔(Ch. 8, #6) Contraction joints:
✔✔True - ✔✔(Ch. 8, #7) True or False: As a general rule, contraction joints that are
spaced closely together are less likely to crack between joints.
✔✔True - ✔✔(Ch. 8, #8) True or False: Reinforcing steel in slabs on ground does not
prevent cracking.
✔✔True - ✔✔(Ch. 8, #9) True or False: Contraction joints are sometimes called control
joints.
✔✔ - ✔✔(Ch. 8, #10)
✔✔feet; 2 to 3; inches - ✔✔(Ch. 8, #11) Spacing of contraction joints is often based on
the rule that the spacing in ______ should be ___ to ___ times the slab thickness in
_______.
✔✔1/4 the slab thickness - ✔✔(Ch. 8, #12) When contraction joints are formed with a
groover, the groover should have a bit deep enough to cut to:
✔✔ravel; random cracking - ✔✔(Ch. 8, #13) If contraction joints are sawed too soon
with a wet-cut saw, the edges of the joint may _______ but if the joints are sawed too
late _________ ________ may occur.
✔✔3rd; 4th; intermediate - ✔✔(Ch. 8, #14) When temperatures are high during the day
and low at night, it's sometimes necessary to saw every _____ or ______ joint before
sawing the __________ joints.
✔✔True - ✔✔(Ch. 8, #15) True or False: During hot weather, it may be possible to saw
contraction joints with wet-cut saws as early as 4 hours after finishing is complete.
✔✔1 hour; 4 hours - ✔✔(Ch. 8, #16) Early-entry, dry-cut saws cut the waiting period
before sawing to as little as ___ ______ in hot weather and about ___ _____ in cold
weather.
✔✔usually cut to a maximum depth of 1.25 inches; should not ride up over hard or large
coarse aggregate; have a skid plate that helps prevent raveling (spalling) at the cut
edges - ✔✔(Ch. 8, #17) Early-entry, dry-cut saws:
