25. Mortar-mixing tools should be cleaned with __ a. dilute muriatic acid b. a stiff brush and water c. water and coarse steel wool d. a strong hose stream 26. An advantage of __ a foot control with using masonry saw is a. use of blade guards can be eliminated b. higher productivity c. both hands are free to guide the piece be- ing cut d. blade speed can be controlled 27. Handheld cutoff saws use blades with a di- ameter of __ a. 71/4inches b. 9 inches c. 12 inches d. 15 inches 28. A tuckpoint grinder scores or cuts stone and masonry materials using __ . a. abrasive wheels b. nitrile blades c. tempered steel blades d. fused silicon wheels

25. The correct answer is b. a stiff brush and water. Mortar-mixing tools should be cleaned with a stiff brush and water to remove any remaining mortar residue. Using dilute muriatic acid or water and coarse steel wool can damage the tools and is not recommended.<br /><br />26. The correct answer is c. both hands are free to guide the piece being cut. A foot control allows the operator to control the saw while keeping both hands free to guide the piece being cut, resulting in higher productivity.<br /><br />27. The correct answer is a. 7 1/4 inches. Handheld cutoff saws typically use blades with a diameter of 7 1/4 inches. Blades with a diameter of 9 inches, 12 inches, or 15 inches are not commonly used in handheld cutoff saws.<br /><br />28. The correct answer is a. abrasive wheels. A tuckpoint grinder scores or cuts stone and masonry materials using abrasive wheels. Nitrile blades, tempered steel blades, and fused silicon wheels are not typically used in a tuckpoint grinder.