Three types of DC industrial motors are widely used: series, shunt, and ____.
a. low-voltage
b. control
c. compound
d. synchronous
c. compound
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____________________ creates an insulating barrier that will not allow the solder to flow easily onto the surfaces being soldered.
Fill in the blank(s) with the appropriate word(s).
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____________________ are sometimes installed inside motors to keep the inside warm enough to prevent condensation when not in operation.
Fill in the blank(s) with the appropriate word(s).
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Geothermal heat pumps use the ____________________ or ____________________ as a heat source or a heat sink.
Fill in the blank(s) with the appropriate word(s).
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Feed rate on a milling machine is expressed in:
A) Inches per minute B) Feet per second C) Feet per minute D) Inches per second
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