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? (this question came up twice)
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?
Brething 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?
D.C.E.N (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
What are the disadvantages of FCAW, Is the require of____?
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? (cant recall the question to this one but the answer was 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. (remember the percentages too)
Argon (75% A.R)
Carbon dioxide (25% C.O.2)