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A warehouse floor requires overall FF40/FL30 and minimum-local FF24/FL18, with each criterion assessed separately. The overall result is FF46/FL35; one valid local test section measures FF28/FL14. How should that local result be reported?
Correct answer: C - Deficient in levelness, because local FL14 is below FL18.
Strikeoff has left shallow ridges and hollows in a workable floor strip. Bleeding has not begun, and the crew is ready with the highway straightedge. Which instruction from the foreman is appropriate?
Correct answer: A - Cut the ridges and fill the hollows now, before bleeding begins.
During outdoor joint cutting, the water supply to a walk-behind saw fails and dust becomes visible. The operation relies on the saw's integrated wet-cutting system for silica control. What is the immediate response?
Correct answer: D - Stop cutting and restore continuous water delivery to the blade.
A batch contains 300 kg of portland cement, 100 kg of fly ash, 160 kg of metered water, and 10 kg of aggregate free water. There are no other water sources. Site water addition is authorized, subject to a maximum w/cm of 0.45. The specified slump limit would allow up to 25 kg more water. What is the greatest addition that satisfies both restrictions?
Correct answer: B - 10 kg
Narrow-aisle trucks are being commissioned on a floor that passed a random-traffic FF/FL survey. The trucks follow fixed wheel paths, and their longitudinal and transverse floor-profile limits are specified. Which measurement addresses those operating requirements?
Correct answer: D - Continuous profiles of the actual wheel paths, configured to the truck geometry.
Dry wind has removed the water sheen from a slab placed over a vapor retarder. The exposed surface looks firm, and the crew is deciding whether to bring on a ride-on trowel. Which finding provides the most reliable indication of readiness?
Correct answer: D - The concrete below the skin supports the machine without excessive deformation.
The preplacement inspection for a floor receiving moisture-sensitive adhesive flooring finds a torn vapor retarder beside a column and an unsealed penetration. A granular capillary break is already in place. Which correction addresses the defects found?
Correct answer: A - Patch the tear and seal the penetration with approved membrane materials.
A contraction joint was filled early with semi-rigid material so a warehouse could open. As the slab dried, a narrow gap developed beside the filler. The concrete edges remain sound, adjacent joints are intact, and the filler manufacturer permits repair with a compatible product. Hard-wheel traffic will continue. What repair best restores the joint's intended function?
Correct answer: C - Clean and refill with compatible semi-rigid filler; shave the repair flush.
A silica-fume production batch matches the accepted trial mixture and satisfies its acceptance limits. It has a higher slump than the former conventional mixture, retains the designed slope, and has the same w/cm. The slab includes deeper integral beams. Choose the placing plan that fits this mixture.
Correct answer: A - Place at the accepted slump and internally vibrate the deeper beams.
For a uniform 150 mm floor, placing and screeding can sustain 250 m²/h, but the fixed crew can finish and protect only 180 m²/h. Deliveries are scheduled at 36 m³/h; all other operations have adequate capacity. What is the highest delivery rate the crew can sustain without increasing the unfinished area?
Correct answer: B - 27 m³/h
The Commercial/Industrial Flatwork Specialist - High Tolerance (Flatwork Specialist - High Tolerance) exam is organized into 1 knowledge domains. These free practice questions are drawn from across them so you can see where you're strong and where to study:
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