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問題一覧
1
Stringer padding means that the base metal surfaces are to be:
built up uniformly using stringer beads.
2
A root pass is produced when the:
first penetrating bead is at the root of the joint.
3
Weave beads are deposited when the electrode is:
moved forward and side to side while welding.
4
A cover pass is a:
thin weave or a series of passes used as the final layer of weld metal.
5
What is the main purpose of pausing on the edges of a weave bead?
to obtain a blend to eliminate undercut at the toes of the weld bead.
6
Electrode angle is:
normally one half of the angle of the joint.
7
When the arc length is increased during welding, what happens to these characteristics? a) penetration ____________ b) puddle fluidity ___________
penetration decreases puddle fluidity increases
8
8. What are two (2) commonly used methods for striking the arc with SMAW ?
tapping method and scratch method.
9
9. Where should you strike the arc on a stop/restart?
start the arc within the weld zone where the arc marks are to be remelted with the weld progression.
10
10. Excessive current settings for SMAW are indicated by:
excessive spatter.
11
11. A normal arc length is considered equivalent to the:
diameter of the core wire of the electrode.
12
13. What is the best method for determining the current setting for an electrode ?
set current according to the manufacturers' recommendations and then test on a piece if scrap approximately the same thickness as the metal needed for weld project.
13
14. What should you do to maintain a normal arc length with electrodes that have high iron powder coatings?
keep the flux coating in contact with the metal surface.
14
15. When you deliberately shorten the arc length, what are you expecting the achieve?
deeper penetration with decreased puddle fluidity.
15
16. What electrode inclination is recommended for the first pass of a 2F weld in 10mm (3/8") material using a 3.2mm (1/8") E4310 (E6010) electrode?
5° - 30° backhand
16
17. What type of bead is usually used for the cover pass on a 2F weld on 10mm (3/8") material?
stringer bead
17
18. What procedure is recommended to complete a 3F weld using E4310 (E6010) electrodes on 10mm (3/8") material?
use one root bead followed by a weave fill and a weave cover pass
18
21. A quick test for polarity can be done using which electrode ?
E4310 (E6010)
19
22. Changing the inclination of the electrode in relation to the direction of travel:
affects the depth of penetration
20
23. The number and letter combinations 3F and 2G, for example, represent:
the required position and type of weld
21
26. Why is it so important to remove slag between passes on a multi-pass weld?
to help prevent slag inclusions between passes
22
27. How should you position yourself relative to the weld?
so that your body is supported and you are able to see the weld zone clearly
23
28. Which electrode normally requires a manipulative welding technique when doing stringer beads on the flat position
E4310 (E6010)
24
29. Which electrode normally uses a drag technique when doing stringer beads?
E4914 (E7014)
25
30. A fillet weld is placed on the underside of the joint with one vertical leg and one horizontal leg is:
a horizontal overhead fillet weld