Practice Exam #2: Chapters 15-18 Flashcards
(31 cards)
Which out of position can be made with all metal transfer methods?
Horizontal fillet weld
When comparing spray transfer to short circuiting transfer, which of the following is true?
Higher current and voltage are required
Which of the following is not a reason for welding in the flat welding position?
Helium sheilding gas is lighter than other shielding gases
What is used to adjust the maximum short circuit current?
Slope adjustment
What drag travel angle should be used when welding in the overhead position?
5°-15°
The _______ method pulls or drags the weld pool along the weld axis?
backhand
What work angle should be used when making a fillet weld in the flat position?
45°
To establish shielding gas flow so the flow rate can be adjusted, set the ________ for 15-20 seconds and pull the gun trigger for a second or less
Post flow adjustment
What should be done if the dry rolls slip while feeding the electrode wire?
Adjust the pressure adjusting knob
What travel angle is used when welding downhill?
20°- 25°
Which of the following will cause ripples in the weld bead to be unevenly spaced?
Moving the gun at an uneven speed
In GMAW, the arc is struck between the _______ and ___________
electrode and base metal
Which of the following will not help prevent undercutting on a horizontal fillet weld?
Changing to forehand welding method
What shielding gas flow rate should be used when welding 1/8” (3.2 mm) mild steel in the flat position?
30 cfh (14 L/min)
What is attached to the root side of the joint to control penetration?
backing
Shielding gas flow rates for overhead welding are ______ those for welding in the flat welding position.
higher than
Which of the following is not part of a complete GMAW outfit?
welding rod
What is the distance from the end of the electrode to the base metal called?
Arc length
Pulsed spray transfer is similar to standard spray transfer however, there are two different currents used. What are the names of the different currents?
Peak and background currents
What part of the welding gun needs to be replaced most often?
contact tube
Which welding position is considered to be the most difficult?
overhead
A butt joint can be formed with a square groove or the edge can be prepared with a groove such as a(n):
V-groove
If the ripples are not evenly spaced, practice moving the gun at _____________ speed.
constant
Which of the following will not help eliminate birds nest when welding aluminum?
Welding only in the flat position
