Power ____ are used by electricians to cut plywood backboards in order to mount electrical equipment and for cutting building framing members during the installation of electrical wiring.
a. drills
b. hammers
c. screwdrivers
d. saws
d. saws
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When did the world population reach 1 billion? Six billion?
What will be an ideal response?
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What procedure is used when heating a brazed copper joint?
A) Heat the fitting first and then heat the pipe after the fitting is hot. B) Use a fanning motion to heat the fitting evenly and slowly. C) Heat the pipe first and then the fitting. D) Concentrate the flame on the line where the pipe slips into the fitting.
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A socket weld allows for a fitting gap of _________.
Fill in the blank(s) with the appropriate word(s).
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The symbol 
stands for ____________________.
Fill in the blank(s) with the appropriate word(s).
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