The shielding gas used on carbon steel is ____.
A. helium
B. carbon dioxide, or a mixture of carbon dioxide and argon
C. argon
D. argon, or a mixture of argon and helium
Answer: B
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Controlling nonfarm erosion involves all but which of the following?
A) topsoil control B) runoff control C) sedimentation control D) erosion control
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____________________ is the most used semiconductor
Fill in the blank(s) with the appropriate word(s).
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What label must appear on the package of grass seed to give a breakdown of the contents of the seed packet?
a. specifications c. breakdown b. examination d. analysis
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Variable refrigerant flow systems operate more efficiently with ________ installed outdoor unit capacity by shifting the heating and cooling to where it is needed
A) full B) smaller C) larger
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