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問題一覧
1
What is the recommended angle for single Vee groove butt joints on 9.6mm (3/8") material?
30°
2
What is a quick and effective method to check the width of your root face?
welding electrode tool
3
Why do you often use the E4310 (E6010) electrodes for the root pass?
because of the deep penetration characteristics and fast freeze puddle
4
How long should the tack welds be for the weld projects in this module?
6.4mm - 9.6mm (1/4" - 3/8")
5
What is the recommended included angle for a single Vee groove weld preperation for 9.6mm (3/8") plate?
60°
6
What indicates complete penetration when doing a root bead with E4310 (E6010)?
the keyhole is continuous
7
How much weld reinforcement should you leave on a cap pass?
approximately 10% of the material thickness (very slight convexity)
8
What is the theoretical electrode angle when using SMAW?
1/2 of the included joint angle
9
What is the main purpose of the first fill pass?
to penetrate into the root and melt out any slag or undercut
10
What is the recommended electrode inclination for the root pass on a 45° overhead open root groove weld using E4310 (E6010)?
0° to 10° backhand
11
What is the recommended electrode inclination for the fill and cap pass on a 45° overhead groove weld using E4918 (E7018)?
0° to 10° backhand or forehand
12
What is likely to happen if you use to much manipulative movement when doing the root bead with E4310 (E6010) in the 4G position?
incomplete penetration
13
What does the GF designation stand for with reference to the 4GF weld?
a groove/fillet combination wrld
14
What is the required spacing between the plates for the 4GF test assembly?
13mm (1/2")
15
Where is the first pass placed in the 4GF weld?
at the junction forming a 90° angle
16
What are two cutting methods that can be used to pierce a hole in steel plate?
still method and traveling torch method
17
What three methods can you use to remove the backing strip from the 4GF weld?
CAC-A, PAC or Mechanical means
18
Why are tack welds made on the back side of a plate member?
The tack welds on the back side ensure that the ends are fully fused,which reduces nothing effects when the coupons are bent. Tacks on the back side also allows easier alignment of the plates.
19
Why should you remove the soapstone line with your cut when cutting a W shape?
removing the soapstone line with your cut insures that the W shape fits through after the cut is complete
20
What is a common problem with the inclination in the 4G position?
as the electrode melts off the electrode inclination changes to the forehand. an excessive forehand inclination on the root pass reduces the arc force needed to push the puddle up above the plate surface. the resulting root pass is generally fused, but appears concave.
21
What is the land and gap recommended for SMAW with 9.6mm (3/8") plate with a single Vee joint preperation using E4310 (E6010) for the root bead?
2.5mm - 3.2mm (3/32" - 1/8") land and gap
22
Why should you ensure that your tack welds are of good quality?
tacks become part of the finished weld
23
Describe what CSA standard w47.1 says about stop/starts on the root beads of a 4GF weld.
csaw47.1 requires a stop/start to be incorporated in the first pass of the Philip and groove welts. the root of the Philip weld musks have a stop/start approximately 114mm (4-1/2") from the start of the weld. the groove weld must have a start/stop approximately 38mm (1-1/2") from the start of the weld.