Week 2 Flashcards
Type of current usually used for TIG on aluminum?
A.C (alternating current)
A separation at the joint root between the work pieces?
Root opening
What are 4 weld positions?
Flat, Horizontal, Vertical and?
Overhead
What does A.W.S stand for?
American Welding Society
Ratio of Duty cycle is ___ time and ___ time?
Arc; Total
Welding is a safe occupation if proper precautionary measures are always?
Observed
Wearing proper eye protection while welding prevents?
Arc flash
To Prevent illness due to over exposure to hazardous materials from the fume plume you should avoid?
Breathing the Fumes
When welding on exotic metals, use?
Mechanical exhaust
When the electrode holder is not in use, hang it in the gas cylinders true or false?
False ( hang in the bracket)
Shield others from _____ causing arc flash while welding.
Ultra violet rays
Correct undercutting by ___ at each side of the weld.
Pausing
Slang terms for SMAW
stick welding
Negative electrode to positive work piece?
DCEP (straight polarity welding)
In all welding a weld pool must be protected from contamination by the atmosphere in the welding process. This is accomplished by either gasses produced by ___ or in the electrode at it is consumed by shielding ___ introduced in the arc.
Coating, gas
What are the disadvantages of FCAW. Is the require of ___ removal and ___cleaning
slag, weld
In the welding shop you should assume that _____?
All work and tools are hot
Electric arc process that produces coalescence of metals by heating them with an arc between a continuous filler metal electrode and the work piece?
GMAW (gas metal arc welding)
Type of welding that normally uses direct current electrode positive?
GMAW
The _____ drives the electrode wire from the wire spool through the cable and gun to the welding arc.
Wire feeder
The push system is designed to push wire through the wire?
Push Wire conduit (liner)
What system displaces air around arc to prevent contamination of the molten pool by oxygen and nitrogen in the atmosphere?
Shield gas system
Two gases aided for mild/low alloy steel
co2 25% argon 75%
Steel wires normally have thin ___ wire to improve electrical pick up and protect the wire from oxidation?
Copper
FCAW can be used in either D.C.E.N and D.C.E.P current true or false?
True
In the FCAW process the shielding of the weld is provided by a ____ ?
Flux Cord
In GTAW the tungsten electrode is only use to produce ___ which creates a puddle in the base metal
Arc
Three things TIG welder must control?
Torch position
Filler rod depositing
Speed of travel
In G.T.A.W, what are the two most common shielding gases. One is Argon and the other _____?
Helium
Two great qualities tungsten is used for.
High melting point
Excellent electrical conductor
Ferrous and nonferrous can be cut by plasma process?
true
Reverse polarity is not generally use in TIG welding because it can ___ the tungsten electrode.
Melt
Plasma arc cutting is a ____cutting process.
Thermal
Air carbon arc cutting is commonly used in?
Gouging and cutting
The application of heat to the base metal immediately ____ welding, brazing, soldering, thermal spraying or cutting
Before
Welding should or should not be done when the ambient temperature is below 0 degrees Fahrenheit?
Should not
A TIG welding torch head can only be cooled with water true or false?
False (air too)
Before a welder can begin work on any job, they must be?
Certified
If the welder uses different process or if the welding procedure is drastically altered?
Re-qualification is required
What is the most widely used and most popular weld inspection?
Visual
A liquid dye penetration kit is destructive method is used to find minute discontinuities flaws in a weld?
False
When gas cylinders are empty, close the valve and mark cylinder?
Empty
What kind of electrode is E6010?
Coated electrode for S.M.A.W that has
60000 P.S.I
“1” Can be welded in any position on carbon steel.
“0” means manufacturer characteristics.
What kind is ER70S-6
Electrode is a solid wire that can be used as filler rod in G.M.A.W and G.T.A.W
70000 P.S.I
The “6” is wire chemistry
What kind is ER316L?
316 stainless steel Electrode Rod or wire that can be filler metal in G.M.A.W or G.TA.W
L means low carbon
What kind is E71T-1?
Flux cored electrode that cannot be used as filler metal. Used in F.C.AW.
70000 P.S.I
“1”means it can be welded in all positions
“T” means it is tubular.
“-1” identifies as self shielded. Used on carbon steel
8 Ways to control distortion
Use clamps so there is no movement in weld
Use braces to prevent movement
Do not over heat weldment
Use small amount of bevel angle
Weld in the same direction
Use chill bars
Do not over weld
Use LG diameter rod so use small amount of weld passes
Vocabulary words
L.K.D.Q.E.M.F.A.N.I.C.H
