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Intermediate Welding
| Term/Question | Definition/Answer |
|---|---|
| Penetration and amperage are controlled by wire feed rate knob on wire feeder, T or F? | True |
| Which type of GMAW metal transfer results in least amount of penetration? | Short Circuiting |
| Crater cracks are results of? | improper technique, improper filler metal, improper base metal |
| In GMAW the distance form the end of the contact tube to the arc is? | Electrode extension |
| In GMAW, they type of metal transfer requiring a special power source is? | Pulsed Arc |
| Which of the following metals cannot be efficiently cut with OFC? | stainless steel/cast iron |
| what are types of metal transfers in GMAW? | Spray, short circuiting, globular, pulsed arc, Open circuiting |
| What could too little of pressure cause in GMAW welding? | slippage |
| When OFC welding, you should open both oxygen and acetylene valves on the torch body, then light it, T or F? | False |
| What should happen if a welder continues to produce rejectable welds? | inspector should require them to retake qualification test |
| What tests can be used to judge weld soundness? | nick break, side bends, face bends, and radiography |
| What can happen if you use preheat? | the metal will have a slower cooling rate and a wider heat-affected zone |
| What can arc blow be caused by? | magnetic field distortion, improper worklead/ground location, welding at the end of a joint, welding in corners |
| What are some shielding gases that can be used for GMAW? | Carbon Dioxide, Argon, Helium, and Oxygen |
| As temp increases | tensile strength decreases, and ductility increases |
| What method is used more often than not to reduce high residual stress created by welding? | postweld treating |
| What could hydrogen in a molten weld cause? | Porosity |
| What discontinuity is least likely to be the result of an improper welding technique? | lamination |
| Is C-10 a good shielding gas for welding aluminum? | No |
| A material's ductility is commonly expressed in terms of what? | percent elongation and percent reduction of the area |
| What is the information that appears to the right of the weld symbol? | the length that the weld is required to be |
| 60-80 | false |
| 4F | qualifies you to weld overhead and everything else before |
| Size of the weld | can't be determined directly from the symbol |
| Welding symbol says: | field welding, weld all-around, a fillet weld, use of shielded metal arc welding |
| T or F, amount of electrode extension during welding will affect weld quality | true |
| What is usually not the cause for porosity in welds? | diffuser |
| What are the types of weld joints? | Lap, Tee, Butt, Edge |
| C | weld size and root penetration |
| Normal gas flow rate at welding tip when welding in flat/horizontal position? | 20-30 CFH |
| D | Depth of Fusion |
| What is the proper shielding gas for spray arc transfer on stainless steel? | 98% argon and 2% oxygen |
| What can cause incomplete fusion? | weld joint contamination and poor fitup |
| A | weld size |
| F | joint root |
| E | concavity |
| What is a common cause of centerline welding cracks? | highly restrained weld joint |
| B | Weld leg and weld size |
| A | convexity |
| D | effective throat |
| Discontinuity | sometimes rejectable, and sometimes a defect |
| What discontinuities can be cause by poor welding techniques? | Incomplete fusion, porosity, undercut, overlap |
| T or F, when welding steel using .045 diameter wire and you need to make a smaller weld you need only to put a .035 contact tip in the gun. | False |
Created by:
horktera
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