BL electric arc welding.txt

how do you clean a direct current arc welding machine and how often

in the direct current arc welding machine the contacts of the motor starter switches and the rheostat should be cleaned and replaced if necessary when?

how often do you check the bearings on a direct current arc welding machine

what is used to loosen scale oxides and slag off the weld

what is a wire brush used for in welding

If a electrode has been in moisture then you weld with it what could happen.

What does moisture do to a electrodes

Electrodes expose to damp there for more than 2 or 3 hours should be dried by heating in a suitable oven. How long? What temp? and what do you do when you take them out?

can you use a electrode if the core wire is exposed

What kind of weld does a DC straight polarity produce

what kind of weld does a d c reverse polar produce

all metals fall into 2 categories what are they

What categories does aluminum, copper,magnesium and titanium alloys fall in

What category does metals that contain iron

What does the electrode covering do or how does it work

Unused electrode stubs and splatter account for about what? Percent consumed electrode

What is the principal force which accounts for the transfer of filler metal in flat position welding

When not welding in a flat position you should use what kind of electrode

temperatures can get as hot as what in shielded metal arc welding

What are the 3 types of free flight metal transfer in a welding arc.

what is the force which keeps the filler metal and slag globules in contact with molten base or weld metal in the crater is known as ?

What is shielded metal arc welding also known as.