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CWB Level 1 Questions with correct Answers
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Exam of 1 pages for the course CWB at CWB (CWB Level 1)
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CWB Level 1, Mod 4 - Welding Processes & EquiptHigh current, low voltage - answer Describe the current and voltage of a welding arc
30% arc heat at the electrode. 70% arc heat at the work. - answer What is the percentage of arc heat at the electrode and at the work when using the GTAW process with current set to DCEN?
15 degrees using a push technique - answer What travel angle and technique should
be used with MCAW for a flat profile and good penetration?
They are classified in conjunction with the welding wire, forming a flux-wire designation. - answer How are SAW fluxes classified?
Electrical resistance in the workpiece. - answer What is the source of heat in the resistance welding process?
Narrow, deep-penetrating welds and HAZ. - answer Describe the welds that result from the electron beam welding process.
The deposition rate will increase, but the penetration is reduced and the risk of incomplete fusion in groove welds is increased. - answer What is the effect of a change in polarity from DCEP to DCEN on SAW weld deposits?
Advantage: High productivity. Disadvantage: Can't do in-position welding. - answer What is the greatest advantage and disadvantage of SAW?
Increased arc voltage increases flux consumption and in the case of active fluxes, the manganese and silicone content of the weld metal is increased. As a result, such fluxes should be used with caution for multipass welds, since there is a potential for build up of
manganese and silicone in the weld metal, thereby decreasing the weld metal ductility and increasing the risk of hydrogen cracking. - answer What are the effects of increasing arc vltage when using an active flux for submered arc welding of carbon steel?
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