Exam 4 Flashcards
What does the ‘U’ in the TC-U9a joint design mean?
Metal thickness, U = unlimited
In the ‘Structural Welding Code - Steel’, which processes are prequalified?
GMAW, FCAW, SMAW, and SAW
Of the following, which is NOT a prequalified process? A: FCAW B: GMAW-S C: SAW D: SMAW
B: GMAW-S
Under AWS D1.1, of the following processes, which is NOT deemed as prequalified?
A: flux-cored arc
B: shielded metal arc
C: short-circuiting transfer gas metal arc
D: spray transfer gas metal arc
C: Short-circuiting transfer gas metal arc
Under AWS D1.1, is it possible for a WPS using GMAW-S to be qualified?
Yes, if the WPSs conform with the requirements of Clause 6.
Of the following processes, which are code approved? A: EGW B: ESW C: GTAW D: All of the above
D: All of the above
If AWS D1.1 code conformance is required would OFW-A be used for welding?
Yes, if the procedure was qualified per Clause 6.
Under AWS D1.1, how could a new welding process be used for welding?
It could be used by qualification of the WPSs under Clause 6.
All FCAW and GMAW prequalified WPSs are required to use _____ as a power supply.
CV (Constant Voltage)
Which standards must most base metals used in fabrication conform with?
ASTM and API Standards
High carbon steel is best welded with which kind of SMAW electrode?
Low Hydrogen
Where are specifications for base metal found?
ASTM (American Society for Testing and Materials)
An ER70S-X electrode would be used for which process?
GMAW
Which process would use continuous solid wire electrodes (E70S-X) for use in semi-automatic welding?
GMAW
An E70T-X electrode would be used in which welding process?
FCAW
The specification for a suitable FCAW filler material when joining ASTM A516 Gr. 55 is:
AWS A5.36
If a steel plate is 1-3/4” thick, what is the most common temperature needed to be preheated to before welding?
225 degrees F
The minimum preheat temperature for 1-1/4” thick A572 steel, Grade 60 is
150 degrees F
The minimum temperature for GMAW welding 2-1/2” thick A572 Grade 60 material is:
225 degrees F
The preheat and interpass temperature for ASTM A992 over 2-1/2”, using FCAW process should never be more than:
300 degrees F
The minimum preheat temperature for using an E7018 electrode to weld 1 inch thick ASTM A36 plate is:
150 degrees F
For ASTM A572 steel, Grade 42, the minimum required preheat for welding 2-1/2” thick steel with a prequalified procedure using the GMAW process is:
150 degrees F
What is the minimum temperature required on adjacent base material for ASTM A537, 1-3/4” thick when SMAW with low-hydrogen electrodes.
150 degrees F
What is the minimum preheat and interpass temperature for SMAW welding ASTM A572, Grade 60 structural steel 2” thick
225 degrees F
Welding 1/2” thick ASTM A36 carbon steel without preheating must be done at a temperature of no less than:
32 degrees F
What is the minimum preheat and interpass temperature when using the SMAW process and an electrode other than low hydrogen on 1/2” structural steel?
32 degrees F
The maximum single pass fillet that may be welded in the overhead position when welding to a prequalified WPS requirement is:
5/16 inch
The minimum skewed T-joint angle allowed for welding a double-bevel groove weld is:
60 degrees
A skewed T-joint has a minimum allowed angle of:
60 degrees
A double-bevel-groove weld in a skewed T-joint must have a joint angle of at least:
60 degrees
What is the root face of a double-V-groove weld, with partial penetration, base metal thickness T1=1/2” minimum joint designation B-P3, angle 60 degrees, and root opening of 0 groove?
1/8”
What is the root opening for a double-U-groove partial penetration weld, base metal thickness T1=3/4” minimum, welding process SAW, joint designation B-P7-S?
+/- 0
What welding positions are allowed for a double-U-groove partial penetration weld, base metal thickness T1=3/4” minimum, welding process SAW, joint designation B-P7-S?
Flat
When the welding process is FCAW and GMAW, what is the joint designation for a double-U-groove partial penetration weld, base metal thickness T1=-3/4” minimum?
B-P-7-GF
What is the effective throat on a single-bevel groove, BTC-P4-GF joint, groove angle = 45 degrees, root face=1/8” minimum, root opening = 0, and allowed to be welded in overhead and vertical positions?
1/8”
For a PJP groove weld B-P1b, the root opening must be no more than:
1/4”
The fit-up angle on a single-V0groove with partial penetration is:
+10 degrees to -5 degrees
The base metal thickness T1 for SAW welding process on a double-V0groove weld, welded on a butt joint, with a partial joint penetration groove is:
3/4”
When the welding process is SAW on a double-U-groove with partial joint penetration, the joint designation B-P7-S, and base metal thickness T1=3/4” min., what welding positions are permitted?
Flat
if the joint designation is B-P7, what welding process is used?
SMAW
What type of metal transfer is not pre-qualified for use with a partial joint penetration groove, TCP8-GF joint type, a=45 degrees, f=1/8” min., r=3/8”, R-), using GMAW
GMAW-S
In B-U6 joint designation, the ‘U’ is for:
unlimited thickness
The ‘U’ in TC-U9 is for:
unlimited thickness
What does a BTC-UC joint designation mean?
Butt joint, corner joint or T-joints, unlimited thickness
What does the ‘B’ mean in the joint designation BL1a?
Butt Joint
What does a TC-joint refer to?
T-Joint or Corner joint
The ‘L’ in the CL1a joint designation stands for:
Limited Thickness
The ‘GF’ in the TC-U9-a-GF joint designation stands for:
GMAW or FCAW
What is the correct root face for a single-J-groove in the overhead position to be shielded-metal-arc welded?
1/8”
What is the joint designation for a double-U-groove, with complete joint penetration, a root face of 1/8”, a groove angle of 20 degrees, and a root opening of 1/8”?
BU-7
Welds need not exceed 3/8” according to which note?
Note J
The weld for a double-bevel-groove weld using a spacer is incomplete…
until the spacer is removed before welding the second side
What must be done before welding the second side of a single-V-groove corner-joint?
back gouge
What procedure must be followed on a complete joint penetration groove weld, R=0-1/8”, f=0-1/8”, a=60 degrees, joint designation B-U3b, allowed all welding positions, before the weld is considered to be complete?
back gouge
Joints without backing should have the roots gouged before welding the other side. This is found in the section: A: 2.9.2 B: 4.10.8 C: 3.3.4 D: None of the above
None of the above
The required root opening for a double-U-groove, with an angle of 45 degrees, welded in the vertical position is:
0-1/8”
When welded to a back-up strip in the flat position, a single-V-groove weld prepared to an included angle of 30 degrees must have a _______ root opening.
3/8”
In a vertical position, a double-J-groove weld is prepared with a radius of ______ and a 45-degree angle.
3/8”
To prepare the double-U-groove weld, the base metal is shaped to a:
1/4” radius
A double-groove eld with SAW shows a root opening of:
0
How would a 3/8” root opening for a double-bevel-groove weld be maintained?
by a 1/8” thick spacer
What is the required included angle of a single-V-groove with a backer, prepared with a 1/4” root opening, to be made in the flat position.
45 degrees
What is the root opening required for the angle of preparation of 20 degree for a C-U2a groove?
1/2”
A single-J-groove weld indicates a root face of:
0-1/8”
For a B-L2c-S weld with a 60-degree angle to be made in a flat position, the root opening is:
0
Of the following, which weld requires 0 root opening? A: double-J-groove B: double-bevel-groove C: double-U-groove D: All of the above
double-U-groove
For a double-J-groove weld, the base metal must be prepared to a _______ radius.
3/8”
A single-J-groove weld must have a root opening of:
0-1/8”
If a single-U-groove weld is to have a 1/4” radius and to be made in the horizontal position, then the prepared angle must be:
45 degrees
For a double-U-groove in the flat position, the angle of penetration must be at least:
20 degrees
For a double-V-groove weld with 1/8” x 3/8” spacer in overhead and flat positions, what is the included angle of preparation?
30 degrees
When may the root opening of a double-bevel-groove weld be 0-1/8”?
A: if the lower plate is beveled 0-15 degrees and the root pass opposite is welded first
B: only in the flat and overhead positions
C: when the top plate is beveled 0-10 degrees
D: All of the above
All of the above
The required root opening for a double-U-groove welded in the vertical position, with a 45-degree angle as fit-up, is:
3/16”
A square groove without backing requires a root opening of:
1/2 the thickness of the thinner plate
What is the angle of penetration for a single-
V-groove butt joint using 1/2” root opening, to be welded in the flat position?
20 degrees
What is the radius of a double-J-groove weld prepared with an angle of 45 degrees, in the vertical position?
3/8”
The required root face for a single-U-groove is:
1/8”
The required root opening for a square-groove weld using 1/4” material is:
1/8”
The included angle of preparation for a double-V-groove weld using a spacer, with a root opening of 1/2” is:
20 degrees
A single-U-groove should never have a root opening of more than:
1/8”
What should the root opening for a single-J-groove using the SAW process in the flat position be?
0
The root opening for a single-V-groove weld with a backing strip, a 45-degree angle, in the vertical position, is:
1/4”
What is the radius of a double-J-groove weld prepared with an angle of 45-degrees in the vertical position?
3/8”
What is the groove angle of a single-V-groove corner-joint if the root opening is 1/4”?
45-degrees
What is the groove radius for a SMAW welded double-J-groove, double V-groove, where the base metal thickness T1 is U and the joint designation is B-U9, and the root opening is 0-1/8”?
3/8”
What is the root face on a double-J groove welded with a groove radius of 3/8”, a groove angle of 30-degrees, joint designation of B-U9-GF, and a root opening of 0-1/8”?
1/8”
What are the permitted welding positions for a SMAW welding process, groove angle 45-degrees, groove radius 1/4”, root face 1/8”, and root opening 0-1/8”?
Flat, Overhead, Vertical
What is the base metal thickness T1 for a SMAW welding process, groove angle 45-degrees, groove radius 1/4”, root face 1/8”, and root opening 0-1/8”?
Unlimited
What is/are the welding position(s) allowed for a SAW welding process, groove angle 30-degrees, groove radius 3/8”, root face 1/8”, and root opening 0-1/8”?
Flat
What figure holds the fit-up tolerance of groove welds?
Figure 5.1
The minimum angle for a full penetration T-joint is?
30-degrees
The base metal thickness on TC-U4B-S is:
Unlimited