Most ac generators have ____________________ field windings.
Fill in the blank(s) with the appropriate word(s).
rotating
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The most commonly used device for checking footing trench depth is the _____.
a. folding rule b. builder's level c. telescoping rod d. laser level
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Which of the following techniques is used to rapidly increase the amount of benefical microbes?
a. phytoremediation c. immunoassay b. biostimulation d. bioremediation
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In a free-bend test, each corner lengthwise should be rounded in a radius not exceeding ____ the thickness of the specimen.
A. 1/2 B. 1/4 C. 1/8 D. 1/10
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Approximately how many species of mosquitoes are known in North America?
A. 50 B. 100 C. 150 D. 500
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