A(n) ____________________ enclosure can be used in any location, but it is much more expensive than other enclosures and therefore, is not used unless there is a viable reason.
Fill in the blank(s) with the appropriate word(s).
explosion proof
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A ____ is the part of a drill that holds the drill bit securely in place.
a. holder b. container c. twist d. chuck
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What is the tensile strength of steel sheet used in making cold-formed steel (CFS) sections?
What will be an ideal response?
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Which of the following is true with regard to fixed stage switchboards?
a. They are not referenced in the NEC®. b. They are not required to contain overcurrent devices. c. They are permitted to supply both stage and non-stage equipment. d. They must be located on the stage.
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Which of the following is not a common use for a torsion spring?
A. a doorknob B. a clock C. a truck D. a wind-up toy
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