Both AC and DC motors can be ____________________ and are so called because the rotor and the rotating stator magnetic field turn at the same speed.
Fill in the blank(s) with the appropriate word(s).
synchronous
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When there are no suitable objects to which a horse can be tied, it may be possible to use a(n) ____________________.
Fill in the blank(s) with the appropriate word(s).
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Noisy ________ may also be an indication of potential problems.
A. Drivers B. Gearboxes C. Machinery trains D. Bearings
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In ____ welding, fluxes and filler metals are not required, electrical current does not pass through the weld metal, and only localized heating is generated.
A. laser beam B. ultrasonic C. resistance D. inertia
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For safety, assume that any facility constructed before 1980 contains _____.
a. asbestos b. confined spaces c. GFCIs. d. PCBs
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