Wire Feed Weldong Filler Metals And Feeders Flashcards
The composition of the base metal is the major factor to consider when selecting:
a) a shielding gas
b) filler materials
c) a power source
d) current settings
b) filler materials
Which organizations have written specifications for wire feed filler metals?
a) WCB and CSA
b) CWB and AWS
c) ASME and CWB
d) AWS and CSA
d) AWS and CSA
When added to ER70S-2 silicon, aluminum and manganese are used as:
a) stabilizers
b) deoxidizers
c) lubricators
d) indicators
b)deoxidizers
Cast refers to the
a) circle formed by one wrap of the wire
b) method of forming the wire.
c) natural twisting action of the wire during forming
d) ability of the wire to be pushed through a plastic liner.
a) circle formed by one wrap of the wire
Describe the helix of a wire and the effect that it may have on welding
Helix is the result of a natural twisting action of the wire during forming. Can cause the wire to wander, the arc becomes unstable and the corkscrew effect causes a change in the direction of wire feed
Interpret the B-G 49A 3 C G2 electrode classification: B G 49A 3 C G2
B - indicates the electrode is classified by tensile strength and with an average 27-joule impact test
G - designates using a gas shielded metal arc welding process
49A - refers to minimum tensile strength of the deposited weld metal in the as-welded condition in MPa divided by 10
3 indicates a minimum temperature of -30 for impact tests
C - designates CO2 sheilding gas
G2 - is a specific chemical analysis of this designated filler metal.
When wires are packaged in sealed containers, it mainly protects them from:
a) smoke and fumes
b) moisture contamination
c) transportation damage
d) ultraviolet light radiation.
b) moisture contamination
Improperly cleaned wires most often produce welds with:
a) wagon tracks
b) cold lapping
c) slag inclusions
d) porosity
d) porosity
Filler metals containing additional deoxidizers are intended for use on:
a) moderately rusty low-carbon steels
b) alloy steels containing chromium
c) non-ferrous metals
d) stainless steels with more than 18% chromium
a) moderately rusty low-carbon steels
What are the primary functions of the flux in FCAW wires?
to provide dioxides and scavengers to remove impurities
to form a slag cover to protect weld metal from atmosphere contamination
to act as an arc stabilizer by providing an electric path
to add alloying elements to provide the mechanical, metallurgical and corrosion resistance properties
Explain the E491T-9CH FCAW wire classification: E 49 1 T 9 CH
E - indicates electrode
49 - indicates tensile strength measured in megapascal divided by 10
1 - refers to all-position application
T - indicates tubular wire
9 - indicates the slag system, current, polarity and shielding gas
CH - refers to controlled Hydrogen
What does the āGā stand for in the CSA FCAW electrode classification E492T-G?
a) gas shielded
b) general classification for electrodes not covered under any other classification
c) for use on Class G secondary containment vessels for nuclear service
d) general purpose electrode for use on carbon and low-alloy steels
b) general classification for electrodes not covered under any other classification
Name two (2) FCAW wires that can be used without external gas shielding
Any of the following is correct:
EXXXT-3, -4, -6, -10, -11, -13, or -14
In the GMAW short-circuiting transfer mode, metal is transferred.
a) when the electrode comes in contact with the weld pool
b) as large globules released from the filler wire
c) as fine droplets moving axially across the open arc
d) when a high current arc pulses ejects metal from the filler wire.
a) when the electrode comes in contact with the weld pool
Very fine droplets of metal transferred across the arc in an axial fashion describes what mode of metal transfer?
a) short-circuiting
b) globular
c) spray
d) pulsed spray
c) spray
