Thirty-four steel boxes are used for a certain wiring job. In each box, five 1-inch holes are drilled. In twenty-three of the boxes, two 13/4-inch holes are drilled, and the remaining boxes have three 11/2-inch holes drilled in them. How many holes are drilled in all the boxes?
Fill in the blank(s) with the appropriate word(s).
249
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Burners inject air and fuel through a distribution system. The key components of a natural gas burner include (select all that apply):
a. dampers b. impellers c. spuds or spiders d. drums
The ____________________ refers to the angle between the GMA welding gun and the work as it relates to the direction of travel.
Fill in the blank(s) with the appropriate word(s).
Emergent plants are sometimes referred to as ____________________ because they grow at the edges of the water garden
Fill in the blank(s) with correct word
Electric signs and outline lighting system equipment in wet locations, unless of the listed watertight type, shall be weatherproof and, if necessary, have ____ in accordance with 600.9(D)(1) through (3).
A. surge protection B. lightening protection C. a front-mounted disconnect D. drain holes