What factor makes fossil fuels less desirable as an energy source for boilers?
a. They contribute to air pollution.
b. They are expensive.
c. They are hard to find and difficult to process.
d. They have relatively low thermal energy density.
a. They contribute to air pollution.
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There are two types of electric current: direct current and ____________________ current.
Fill in the blank(s) with the appropriate word(s).
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Approximately how many tools are combined in a combination square? Describe each
What will be an ideal response?
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Inductive reactance decreases as frequency increases
Indicate whether the statement is true or false
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Keep a fire extinguisher at hand whenever using equipment powered by _____
a. compressed air b. electricity c. hydraulic fluids d. gasoline
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