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
Answer: D
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What will be an ideal response?
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What are some of the most important components of 139?
To operate the circuit in Figure 13-1 below the resonant frequency, ________ the resistance and ________ the frequency
A) decrease, decrease B) do not change, increase C) increase, increase D) do not change, decrease