How many focal points should an arrangement have?
What will be an ideal response?
One
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Describe the two recommended procedures to be observed for arc welding tool steel.
What will be an ideal response?
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When preparing the welding area, it is important to _____
a. close all doors and windows b. use compressed oxygen to blow away debris c. know the location of the nearest fire extinguisher d. keep the area well-ventilated with oxygen
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____ waveforms are composed of both even and odd harmonics.
A. Sinusoidal B. Square C. Triangular D. Sawtooth
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The United States uses _____ as much water as other nations
a. half b. twice c. two-thirds d. four times
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