A ____ is used to provide support for floor joists and the subfloor when they intersect the concrete.
A. rafter
B. bridge
C. span
D. ledger
Answer: D
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Float switches can be used to pump water from a tank or sump.
Answer the following statement true (T) or false (F)
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In the diagram, if AD = 12 in, DE = 13 in, AE = 14 in, BC = 22 in, determine the length of AC. 
Round the answer to the nearest tenth.
?
Fill in the blank(s) with the appropriate word(s).
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The demarcation point is defined by:
A) the telephone company B) the business customer C) it depends on the size of the business customer D) none of the above
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Batteries can be an explosion hazard because _____.