There are many methods of insulating metal ductwork. Which of the following methods is NOT used to insulate ducts?
A) Bubble outer wrap or liner B) Spray-on urethane foam
C) Fiberglass outerwrap with vapor barrier D) Fiberglass liner
B
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_____ are typically encountered with processes that use a flux or leave a slag or residual silicon after welding.? ?
Fill in the blank(s) with the appropriate word(s).
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What is used to be sure an electrical circuit is not open?
a. a 3-way switch c. a wire nut b. a duplex receptacle d. a continuity tester
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NEC® tables such as 210.21(B)(3) present a requirement's ____.
A. multiple application possibilities B. pricing structures C. revision schedules D. governing agencies
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Which of the following is NOT part of a rack-and-pinion steering system?
A. pitman arm B. idler arm C. center link D. all answers are correct
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