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29: Know and Understand
The SMAW process is best suited for bonding _____ metals.
The flux coating on an SMAW electrode chemically reacts to the heat of the arc, creating a(n) _____-free shield of gas around the molten weld pool.
The size of an electrode is determined by its _____, and the electrode type is determined by the flux coating.
An E7018 electrode will produce a finished weld with a tensile strength of _____ psi.
What are the five main classifications of welded joints?
What are the four basic welding positions recognized by the AWS?
What three main factors determine the amperage required to weld?
The deposition of spatter around a completed weld is an indication of a(n) _____ arc length.
A pointed effect in the ripple of the finished bead results from too much electrode _____.
If welding travel speed is too fast or too slow, the result will likely be a bead that lacks _____.
When welding material over 5/16″ in thickness, it is advisable to _____ the joint edges to ensure complete penetration.
_____ electrodes should be chosen to weld on steels with a high carbon content.
Weld discontinuities that are at an unacceptable level are considered weld _____.
Name two nondestructive test methods used on welds.
Why should welders wear shirts with no pockets or covered pockets?
Why is tapping a better method of striking an arc than scratching?
Drilling holes at both ends of a crack and _____ the weld as it cools are measures used to reduce cracking when cast iron is welded.
Welders can obtain welding _____ by passing tests based on welding code in which they produce welds under prescribed conditions.
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