To prevent heat buildup in the weld and form smaller puddles, the welder can increase the _____
a. voltage
b. arc length
c. bead width
d. travel speed
d
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Air purifying respirators can only be used when the ambient atmosphere contains a minimum of ________ percent oxygen.
Fill in the blank(s) with the appropriate word(s).
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Congress has mandated that all gasoline must contain at least _____- ethanol
a. 5% c. 15% b. 10% d. 30%
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A skin irritation caused by contact with wet cement or mortar is called cement _____
a. rash b. dermatosis c. dermatitis d. inflammation
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One difference between reptiles and amphibians is the structure of their _____.
Fill in the blank(s) with the appropriate word(s).
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