List four common welding problems.

What will be an ideal response?


1. Weld porosity (holes in the weld)2. Weld cracks (cracks on the top or inside the weld bead)3. Weld distortion (uneven weld bead)4. Weld spatter (drops of electrode on and around weld bead)5. Weld undercut (groove melted along either side of the weld and left unfilled)6. Weld overlap (excess weld metal mounted on top and either side of the weld bead)7. Too little penetration (weld bead sitting on top of the base metal)8. Too much penetration (burn-through beneath the lower base metal)

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What will be an ideal response?

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A) fetches instructions and data from memory. B) is the "brain" of the computer. C) processes the machine code. D) All of the above.

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A reading taken on a leveling rod held on a point of unknown elevation is called the _____.