welding Flashcards
when heat alone is used to melt and flow metal together, the process is known as…
fusion welding
welding by heating and then forcing the pieces together is called…
pressure welding
the form of arc welding that uses flux-coated welding rods is called
shielded metal arc welding
gases such as helium and argon. which are used to shield the liquid metal during welding, are called
inert gases
the flame from an oxyacetylene welding torch burns at about
6000 degrees
the metal that is melted from the pieces being joined is called
weld metal
metal added to fill the welded joint is called
filler metal
when full, oxygen tank pressure can be as high as
2200 psi
acetylene tank pressure, when full, is about
250 psi
when opening the oxygen tank valve, how far should it be opened?
all the way
when opening the acetylene tank valve, how far should it be opened?
1/4 turn
what devices control the welding gas pressure delivered to the welding torch?
gas pressure regulators
acetylene gas is unstable when compressed against itself at pressures higher than
15 psi
what color hose is always used to connect the acetylene regulator to the welding touch?
red
an oxyacetylene torch should never be lit with a …
match
for most welds, what kind of oxyacetylene flame is used?
neutral
a flame that is burning too much acetylene is called
carburizing
to turn off a lighted oxyacetylene torch, which torch valve should be closed first?
acetylene
a welding electrode that comes covered with materials that melt to protect the weld metal from the air during shielded metal arc welding is called a
coated electrode
what is the approximate tensile strength of an E6013 electrode
60,000
arc welding can produce temps as high as
10,000
unless protective clothing is worn, arc welding will cause skill burns much like obtained from
the sun
a weld bead made without weaving the electrode side to side is called
stringer bead
name the two kinds of electric current used for arc welding
A C D C
during arc welding, protective clothing must be worn for protection against what two kinds of burns
spatter & inferred ultraviolet
name two methods of starting an arc with a coated electrode
scratch or tap
name the 5 different types of welds
butt
joint
lap
corner
t
name the four basic welding positions
over the head
flat
horizontal
vertical
