and Answers7
constant current - ANSWERS-what type of power supply is required for GTAW?
decreases the current - ANSWERS-in a constant voltage output system, increasing tip to work
distance increases the resistance in the power circuit. What is the effect on current flow?
rebaked at 370 to 430 degrees C - ANSWERS-Electrodes that are exposed to the environment for
more than 4 hours should be?
inert OR reactive gases - ANSWERS-the GMAW process protects its welds through the use of:
the 1st pass is done using a drag technique - ANSWERS-When welding the first passes of thick
groove joints with weld backing:
gas shielded penetrate more deeply than self shielded electrodes - ANSWERS-which electrode
penetrates more deeply? Gas shielded or self shielded
short-circuit transfer - ANSWERS-which GMAW transfer is most prone to incomplete fusion?
CO2 - ANSWERS-Which shielding gas may require an in line heater at high flow rates?
6-12mm (1/4 - 1/2") - ANSWERS-The required electrode extension for short-circuit transfer is:
flat and horizontal - ANSWERS-Which position is SAW normally performed in?
, intended for single pass only - ANSWERS-What do the letters GS mean in the following type of
electrode? ER70S-GS
Voltage-Sensing Wire Feeder - ANSWERS-A power supply set to constant current mode requires
a:
120v- 240v single phase - ANSWERS-Residential power in Canada is supplied at what value?
high voltage - ANSWERS-To initiate an arc requires:
EWP - ANSWERS-Which of the following designates an "unalloyed" tungsten?
DCEP (reverse polarity) - ANSWERS-Which GMAW polarity produces deeper penetration?
constant current - ANSWERS-Which type of power is best suited for manual welding?
composite filler metal - ANSWERS-What does the letter C stand for in the following type of
electrode? ER70C-X
pure tungsten using AC - ANSWERS-Which tungsten would you expect to see balled after
striking an arc?
high current - ANSWERS-Excessive spatter and undercutting of a weld bead can be caused by:
increase arc voltage - ANSWERS-To increase arc length when SAW welding: