The electronegative charge on 2:1 type silicate clays is due primarily to _____.
a. ionization of surface OH- groups
b. the effect of pH on the presence of H+ ions in the exchange complex
c. substitution of one metallic atom for another in the crystal structure of the clay
d. extremely small size of the individual colloid particles
e. the preponderance of tetrahedron sheets compared to octahedron sheets
Answer: c. substitution of one metallic atom for another in the crystal structure of the clay
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Answer the following statement(s) true (T) or false (F)
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In platform-frame construction, the wall framing, floor framing, and roof framing have one thing in common in that each is made of closely-spaced, parallel lumber members that are joined together at each end by a continuous cross member that is perpendicular to the parallel members. Name the cross members in wall framing, i.e., the members that connect the studs together.
What will be an ideal response?
Describe how the members of a tee joint come together.
What will be an ideal response?
The direct addressing mode ________
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