Welding/Metalwork Base metal Prep

Base metals should only be cleaned if you want them to look nice

• True

• False

Corrosion occurs when metal is exposed to......

• Fire

• Air

• Grease

The most common defect caused by surface contamination of metal is....

• structure

• porosity

• stains

• rust

Which is NOT a žcommon method of removing surface contamination.

• Sandblasting

• Power Washing

• Hand Tools

• Power Tools

Only stainless brushes should be used when working with aluminum or stainless steel

• True

• False

Common pneumatically powered tools are all except...

• Weld flux chippers

• Power washer

• Chipping Hammers

• Needle Scalers

When selecting the joint many factors must be taken into account, select all that apply.

• Materials

• Cost

• Enviorment

• Load consideration

Wire brushing will not remove....

• Paint

• Light currosion

• Surface currosion

• Tight Currosion

žWhen the porosity has a length greater than its width it is called piping porosity.

• True

• False

žThe type of preparation required depends on all EXCEPT...

• The governing code requirements

• Condition of base metal

• Base metal type

• Amps of your welder

• Welding process used