SEMI AUTO 1
What are the two most commonly used aluminum filler metals?
ER 4043 and ER 5356
How should you flow meter be positioned to read correctly.
Vertical
How can you unfreeze your regulator when welding with CO2?
You can use a heated regulator.
You are driving the service truck and the bottles don't have caps on the valves can you drive away.
NO regulators must be removed and the caps installed.
What is the penetration characteristic when welding with pure argon on carbon steel?
Deep finger penetration
What is the most common gas mixture for carbon steel ?
75%AR/25% CO2
Who must oxygen is added to argon to improve weld characteristics?
1-5%
What can happen when wire has an incorrect cast and helix?
The ARC can wonder and the weld bead.
What material do you add to ER309LSi to improve arc stability?
SILICON
B-G 49 A 6 M G3 What does 49 represent ?
Tensile strenght page 41
B-G 49 A 6 M G3 What does the letter A represent ?
Weld treatment (AS WELDED or POST WELD HEAT TREATMENT) Page 41
B-G 49 A 6 M G3 What does the number 6 refer to?
Temperature for min average impact energy Page 41
B-G 49 A 6 M G2 Why would you use G2 electrode on a rusty surface.
They are triple deoxidized Page 41
B-G 49 A 6 M G3 Which number designation would you find the elongation for this wire.
Number 49 Min elongation 18% Page 41
B-G 49 A Z M G3 Which letter is not suited for low temperature applications
The letter Z Page 41
B-G 49 P 4 C G2 Which letter designation is for post weld heat treatment?
P for post weld heat treatment
How does the classification of tensile differ from the CSA system from the AWS system?
The CSA system uses MPA and the AWS uses KSI for tensile strength measurements .
What does the letter C indicate in a wire designation for a metal cored electrode?
CORED
What is the max flux/metal ratio for the self shielded FCAW process?
35%
What can be added to the flux of a shelf shielded FCAW electrode to combat oxides and nitrites in the weldment?
Titanium and aluminum
How is he grain structure in the heat affected zone refined by using weaves or stringer passes?
Welding stringer passes.
When the tip to work distance remains the same and the electrode extension decreases what is the effect on the weldment.
A flatter wider weld bead
What may cause oversized spatter droplets or electrode stubbing on arc initiation?
Excessive inductance
Which function of the power source controls the rate of short circuits per second?
Inductance
What is recommended when preforming multi pass weld to ensure that there are no weak sections?
Staggered starts and stops