Welders' helpers ____.?
A. ?clean slag from the welds, and help position weldments
B. ?operate machines or automatic equipment used to make welds
C. ?often help the welder by making small welds to hold parts in place
D. ?design, specify, and oversee the construction of complex weldments
Answer: A
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Motors larger than ____________________ horsepower run more efficiently and cause less voltage
drop problems when operating with ____________________ volts.
Fill in the blank(s) with the appropriate word(s).Mixtures of argon with less than ____ percent carbon dioxide may not have enough arc voltage to give desired results.
A. five B. ten C. thirty D. fifty
Standard and Phillips are types of ____________________
Fill in the blank(s) with correct word
The period of most AC waveforms is measured in units of:
A) cycles. B) seconds. C) alternations. D) revolutions.