The NEC® requires rigid metal conduit to be supported within __________ feet of each box and then no more than every __________ feet thereafter (general rule).

a. 3, 8
b. 5, 10
c. 2, 10
d. 3, 10


d. 3, 10

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In a closed hydronic system, do changes in the elevation of the piping flow path affect the hydraulic performance of the system?

What will be an ideal response?

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Answer the following statement(s) true (T) or false (F)

Slump tests are done to determine the proper mixture of ingredients before placing concrete.

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One hundred square feet of roof is called a ____.

A. patch B. plot C. square D. circle

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Determining the insured costs of accidents is a simple matter of