p10-3 task 2

Question 1

for welding aluminum you will select

1. DCEN
2. DCEP
3. ACHF
4. pulsed current

Answer 1

c. ACHF

Question 2

for stringer bead welding the nozzle diameter is approximately

1. the same width as the weld bead
2. the same diameter as the electrode diameter
3. twice the diameter of the electrode diameter
4. twice the thickness of the base metal

Answer 2

a. the same width as the weld bead

Question 3

the tungsten electrode should extend ______ electrode diameters for most GTAW applications.

1. 1 to 2
2. 2 to 3
3. 3 to 4
4. 4 to 5

Answer 3

a. 1 to 2

Question 4

the arc length is usually ______ times the diameter of the electrode.

1. 1
2. 1 ½
3. 2
4. 2 ½

Answer 4

b. 1 ½

Question 5

for welding beads in the flat position the recommended torch angle is

1. 25° to 30° from the workpiece
2. 40° to 45° from the workpiece
3. 55° to 60° from the workpiece
4. 70° to 75° from the workpiece

Answer 5

d. 70° to 75° from the workpiece

Question 6

which of the following devices allows for a greater electrode stick out

1. collet cap
2. electrode lens
3. gas lens
4. fuse link

Answer 6

c. gas lens

Question 7

for stringer beads in the flat position, the filler rod angle should be

1. 15° to 20° from the workpiece
2. 25° to 30° from the workpiece
3. 35° to 40° from the workpiece
4. 45° to 50° from the workpiece

Answer 7

a. 15° to 20° from the workpiece

Question 8

the flow rate for shielding gases used in GTAW is generally

1. 2 to 4.7 L/min. (5 to 10 cfh)
2. 4.7 to 7 L/min. (10 to 15 cfh)
3. 7 to 9.4 L/min. (15 to 20 cfh)
4. 9.4 to 11.7 L/min. (20 to 25 cfh)

Answer 8

c. 7 to 9.4 L/min. (15 to 20 cfh)