Two ways to specify mortar. - correct answer ✔✔PROPORTION, PROPERTY
Types of portland cement NOT recommended for use in mortar. - correct answer ✔✔AIR ENTRAINED,
TYPE IV OR V
Weak type of mortar used for restoration work - correct answer ✔✔TYPE K
Most important hardened property of mortar and ONE factor that affects this property and its effect. -
correct answer ✔✔BOND STRENGTH INCREASES FOR LOWER IRA, LOWER AIR CONTENT, LESS ELAPSED
TIME, HIGHER MORTAR FLOW, INCREASED PRESSURE, MODERATE WATER RETENTIVITY, W/
RETEMPERING, W/ ROUGH SURFACE TEXTURE, AND W/OUT MOVEMENT BEFORE SET
Two general types of brick - correct answer ✔✔BUILDING, FACING, PAVING, HOLLOW
Property of masonry unit that affects bond strength. - correct answer ✔✔IRA / SUCTION)
Ratio of easily fillable to totally fillable pore space. - correct answer ✔✔C/B RATIO OR SATURATION
COEFFICIENT
Most important property of masonry units that is predicted / controlled in specifications using
compressive strength, boiling absorption, and saturation coefficient. - correct answer ✔✔DURABILITY
The product of the average annual number of freezing cycle days and the average annual winter rainfall
in inches. - correct answer ✔✔WEATHERING INDEX
The denser, darker colored section of each annual ring. - correct answer ✔✔SUMMERWOOD
, The category of wood/timber with needle-like or scale-like year-round leaves. - correct answer
✔✔SOFTWOODS/CONIFERS
Water that travels through the sapwood. - correct answer ✔✔FREE WATER
The moisture content where all cell walls are saturated but no moisture is contained in the cell cavities. -
correct answer ✔✔FIBER SATURATION POINT
Typical values for Fiber Saturation Point - correct answer ✔✔25-30%
Term meaning to have different properties depending on direction. - correct answer ✔✔ANISOTROPIC
Two factors that affect the strength of wood. - correct answer ✔✔SLOPE OF GRAIN, SPECIFIC GRAVITY /
DENSITY, MOISTURE CONTENT, TEMPERATURE, DURATION / RATE OF LOADING, DEFECTS, VARIABILITY,
LOAD SHARING, TREATMENT, SIZE
The three directions used to describe the orientation of loading. - correct answer ✔✔LONGITUDINAL,
RADIAL, TANGENTIAL
The direction with the least amount of shrinkage. - correct answer ✔✔LONGITUDINAL
The highest strength characteristic (type of stress / direction) - correct answer ✔✔TENSILE STRENGTH
PARALLEL TO THE GRAIN
Cross-sectional area where dead cells are preserved. - correct answer ✔✔HEARTWOOD
Thin layer beneath the bark where growth occurs. - correct answer ✔✔CAMBIUM
Common type of longitudinal cells used for support and transport in both softwoods and hardwoods. -
correct answer ✔✔TRACHEIDS
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