Practice Exam #3: Chapter 19-22, 35 & 36 Flashcards
Which of the following is not a part of the GTAW set up?
A. A welding machine
B. A hot start
C. A torch
D. An inert gas supply and control
B
Which of the following is not selected when using the welding machine?
A. Current range
B. Electrode Diameter
C. High frequency voltage
D. Current Type
B
To set an amount of welding current that will not change during welding, the ____________ is set to the panel position.
A. Circuit breaker
B. Contactor switch
C. Current switch
D. Current type switch
C
Which of the following electrodes would be best to use when welding a butt weld on carbon steel?
A. ER80S-D2
B. ER70S-6
C. ERTi-1
D. ER308
B
What shape should an electrode tip used for DC welding have?
Tapered with a blunt tip
How far from the work should the tip of the electrode be held after the welding arc is stabilized?
1/16”-1/8” (1.5mm - 3.0mm)
What work angle is used to weld a bead on a plate or a butt joint?
0°
What is the recommended work angle when welding a fillet weld?
45°
What term describes a metal that does not have much strength when heated ?
Hot shortness
Which of the following is not a cause of an unstable arc?
A. Argon is used as the shielding gas
B. Electrode is contaminated
C. Weld joint is too narrow
D. Base metal is dirty
A
Which of the following is beneficial when welding out of position?
A. Larger filler rod diameter
B. Pulsed current
C. Use of DCEP
D. None of the above
B
At what angle is the filler metal held when making a horizontal fillet weld?
15-20°
Which current type is best for welding on mild or stainless steel?
DCEN
When welding in horizontal or vertical positions, where in the weld pool should the filler metal be added to help prevent undercut or underfill?
Top side
What does the weld pool look like during the root pass of a butt joint?
Keyhole
