Exam Questions and Answers |
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T/F Brick & Stone are usually served as facing materials - veneers, or
decorative walls. - ANSWER ✔✔True
T/F Concrete Masonry Units (CMU) are usually served as foundation
walls, structural support walls (low rise), or backup walls for exterior
facing. - ANSWER ✔✔True
T/F Mortar could be used to seal joints between the masonry units,
minimizing the flow of air and water. - ANSWER ✔✔True
,T/F Mortar could be used to adhere units, providing resistance to lateral
forces from wind, earthquakes. - ANSWER ✔✔True
T/F Portland cement is hydraulic cement and it hardens by chemically
combining with water (hydration). - ANSWER ✔✔True
T/F A well-graded mix lime mortar should be particles ranging in size
from 0.003 - 0.187 feet in diameter. - ANSWER ✔✔False
T/F For lime mortar ingredients, sands must be free of contaminants,
physically sound, and may be chemically reactive with the other mortar
ingredients. - ANSWER ✔✔False
T/F Hydrated lime could be liquid or wet powder. - ANSWER
✔✔False
T/F For lime mortar ingredients, water must be clean, neutral pH, free of
contaminants or organic material. - ANSWER ✔✔True
T/F A minimum amount of water is necessary for the chemical hydration
of the cement; additional water is added to produce a working
consistency to the wet mortar. - ANSWER ✔✔True
T/F Masonry cement has no added lime ingredient. - ANSWER
✔✔True
, T/F Masonry cement has higher bond strength than cement-lime
mortars. - ANSWER ✔✔False
T/F Mortar cement produced to a standard that assures higher bond
strength comparable to cement-lime mortar. - ANSWER ✔✔True
T/F Lime mortar has hydraulic cement ingredient. - ANSWER
✔✔False
T/F Lime mortar has some ability to self-heal hairline cracks that may
develop over time; as water and air enter the joint, carbonation can
occur and repair the joint. - ANSWER ✔✔True
T/F Lime mortar is used primarily for the restoration of historic masonry
structures. - ANSWER ✔✔True
T/F Set accelerators and retarders are used to adjust setting time only in
hot weather. - ANSWER ✔✔False
T/F Higher-strength mortars have a higher proportion of cement to lime
in the mortar mix, resulting in higher compressive strength in the
hardened mortar. - ANSWER ✔✔True
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