Welding Flashcards
What does CC. Stand for?
Constant current
What does CV stand for?
Constant voltage
7018, what is the tensile strength?
70x1000 = 70,000
What does 1 stand for?
1 = all positions
What does 0 stand for
Flat horizontail
What is travel angle?
Is the angle of the electrode in relation to direction of travel
What is travel speed?
Is the speed you are moving at, must be maintained so that the base metal is melted by Heat from the arc
Street polarity deposits [. ) , more fluid (. )
Faster, puddle
Reverse polarity -
Cold rods deeper penetration , less inclusions, more control
What is most common length
14 inches
What is the rule of thumb when setting the average on a welder?
Convert the electrode core wire diameter from a fraction to thousandths of an inch , then use this number to set the amperage
What is porosity?
Is idenfied by small pit holes and is an indication of gasses trapped in the weld
AWS code ER70S-6, what does the s stand for?
Solid wire
What is the four basic types of welds?
Groove weld, fillet weld , plug weld, surfacing weld
What are the four weld passes ?
Root pass, fill pass, cover pass, fill and finish pass
What is arc blow?
Is a condition often encountered where extensive D C welding has been done at High Heat (High amps)
How is arc blow caused?
Caused by magnetic fields being set up within the work due to current travelling in the same direction for a prolonged period.
What are the basic joints R
Butt joint, lap joint, corner joint, T joint, edge joint
What determines the type of electrode used?
Type of metal
What is duty cycle?
How long the machine can weld at full power until it needs to cool down
What are five key points to control weld
Heat (amp), distance (arc length), angle, Travel speed, manipulation
What are the three types of power source?
Transformers
Inverters
Generators
What is considered A multi- process machine?
Inverters
What welding machine has the lowest start-up cost?
Transformers
What is straight polarity known as?
Electrode negative
When using straight polarity what terminal is the electrode connected to?
Negative terminal
Reverse polarity is also known as ?
Electrode positive
What terminal to connect to when welding reverse polarity
Positive terminal
When is penetration deeper? DCEP or DCEN?
DCEP
If a short arc is used, which of the following occurs?
Bead is narrow and built up an penetration is deep
Five basic weld joints (hint bctel)
Butt, corner,t , edge, lap
What symbol is this?
Field weld
What symbol is this?
Weld all around
How far do we open the valve of Ce 3000psi gas cylinder?
All the way (double-seated value)
What is one was to avoid arc blow when arc welding?
Revert to an AC welding process
What cause spatter?
Arc too hot
What is true when vertical up SMAW welding?
Push the rod and keep arc short
How would you increase the penetration of a stick weld
Increase the amperage or slow-down the pass of the arc
Which gas is used for GMAW on carbon seals?
Argon / C02Mix
