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Optimal site grade

What range of slopes would make a site easiest to build on and suitable for all types of intense activities?
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Bolted connections

What is the minimum spacing of bolts specified by AISC? and preferred spacing? A. 1 1/4 times the diameter of the bolt; 2 times preferred B. 1 3/4 times the diameter of the bolt; 2 1/4 times preferred C. 2 1/3 times the diameter of the bolt; 2 2/3 times preferred D. 2 2/3 times the diameter of the bolt; 3 times preferred E. 3 times the diameter of the bolt; 3.25 times preferred
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Roof pitch

Which one of the following slopes in this illustration corresponds with an 8:12 pitch roof? A. 45° B. 36.87° C. 33.69° D. 26.57°
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Soil Analysis

In sieve analysis, one of the first results measured is the % retained in each sieve of the total sample (W sieve / W total x 100%). If the illustrated sample indicates equal amounts of various sizes of aggregate, where most of the voids in such material will be filled with particles, which gradation term is used? A. Narrow gradation B. Gap gradation C. Dense gradation D. Open gradation E. Rich gradation
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