Concrete Flatwork Technician and Finisher Practice Test 2026 – Complete Exam Prep

Oversanding means the mix has too much sand relative to cement, so there isn’t enough cement paste to bind the aggregates and fill the voids. This weakens the concrete matrix, making the surface more susceptible to abrasion and wear. At the same time, the reduced cement paste content and higher porosity lead to greater drying shrinkage, which can cause cracking and dimensional changes in the floor. So the floor ends up with poor wear resistance and excessive shrinkage. The other options describe outcomes that don’t match this weakened, more shrink-prone condition.