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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