A(n) ____________________ is the primary metal source for a weld.
Fill in the blank(s) with the appropriate word(s).
core wire
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A circuit diagram shows that the circuit divides into separate branches and there are also series loads. This is a(n) _____.
a. series circuit b. parallel circuit c. series-series circuit d. series-parallel circuit
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Before changing accessories or performing maintenance on a power tool, make sure _____.
a. it is turned off b. your hands are dry c. to have a clean work surface d. the power is disconnected
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What thermal efficiency was James Watt's 1765 steam engine able to achieve?
A. 1% B. 4% C. 10% D. 40%
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The electromechanical odometer uses a(n) ____stepper motor that receives control signals from the speedometer circuit.
A. AC B. DC C. oscillating D. negative
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