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1. What is welding procedure specification?<br />
2. A PQR<br />
T = 1”<br />
SMAW = 3/4”<br />
GTAW = 1/4”<br />
• SA 516-70<br />
• PWHT at 1100 0 F for 1 hr.<br />
• Satisfy UG-84 reqmn’t (impact test)<br />
Is this PQR can support the WPSs for the following production welding, where impact test is also<br />
required ?<br />
a. Shell to shell : SA 516-60, 1” Thk., SMAW only, PWHT 1 hr.<br />
b. Shell to head : SA 516-70, 2” Thk., SMAW only, PWHT 2 hr.<br />
c. Nozzle neck to Flange : SA 106-C to SA 105, 3/4” Thk, GTAW only, PWHT 1 hr.<br />
D. Nozzle neck to Flange : SA 106-C to SA 105, 1/2” Thk, GTAW only, PWHT 50 minute.<br />
3. Welder Qualification<br />
A welder tested on a 1” NPS Sch 80, 6G position, SMAW. The Visual inspection &<br />
Radiographs result comply to QW - 194 & QW - 191 (respectively) requirements.<br />
Is the Welder qualified to weld 2” NPS Sch 80, 5G position using same welding process?<br />
4. Who is responsible for preparing the foregoing and what are the requirements for<br />
documentation under the Code ?<br />
5. a) Who is responsible for the quality of welding produced in Code manufacturer's shop ?<br />
b) Who is responsible for qualification of welding procedures, welders and welding<br />
operators?<br />
c) Who may ask for the re-qualification of a welder ?<br />
6. a) How long does a welder's qualification remain valid ?<br />
b) Who maintains the qualifications records of procedures, welders, and welding<br />
operators?<br />
7. For welder qualification tests :<br />
Under what conditions may a welder be re-tested after one or more of his test specimen<br />
failed to meet requirements ?<br />
8. For welder qualification tests :<br />
a) Will passing test on pipe specimens qualify welder on plate ?<br />
b) How often should welders be required to make qualification tests ?<br />
9. Under what conditions has an Authorized Inspector the right to call for re-qualification of a<br />
welding operator or welder ?<br />
10. What is a "backing strip" as used in metallic arc welding ?<br />
11. What is meant by the terms " lack of fusion"?
12. What is meant by the terms " lack of penetration"?<br />
13. What is meant by the terms " slag inclusion"?<br />
14. a) Describe " Heat Affected Zone"<br />
b) How can we reduce the effects of the "Heat affected Zone" ?<br />
15. Name three arc-welding processes.<br />
16. a) What is the basic difference between gas metal arc welding and gas tungsten arc<br />
welding processes ?<br />
b) In Submerged arc welding, what conducts the current between the electrode and the<br />
base metal ?<br />
17. What deficiencies would you look for on visual inspection of welded horizontal and<br />
circumferential joints in a vessel shell ?<br />
18. a) How must a welder identify the welding which he has performed in production ?<br />
b) Why is this identification necessary ?<br />
19. In procedure or performance qualification tests of welding, what is the difference<br />
between a transverse face bend test and a transverse root bend test ? Youmay answer<br />
this by description or sketches.<br />
20. Three (3) lathe-turned tensile test specimens of welded joints confirming to Figure QW-<br />
462.1 of Section IX are prepared from steel of the following ultimate tension strengths, are<br />
of the following diameters and broke under the ultimate tension loads shown below. All<br />
broken in base metal outside the weld and heat affected zone. Are tests satisfactory or<br />
unsatisfactory. Give reasons for your answers.<br />
Diameter Ultimate Ultimate<br />
Tensile PSI<br />
Total Load (Broke)<br />
1. .507" 60,000 PSI 12362 lbs.<br />
2. .345" 75,000 PSI 6723 lbs.<br />
3. .255" 90,000 PSI 4268 lbs.<br />
21. If a tension test breaks in the plate, is it acceptable?<br />
22. What are the various positions in which a welder may qualify and describe each?<br />
23. What steps are necessary to qualify a welder for all position pipe welding?<br />
24. What tests are required for the weldment made for qualification of a welding procedure?<br />
25. What is an essential variable on a welding procedure specification ?<br />
26. What is a non-essential variable on a welding procedure ?<br />
27. Who is responsible for conducting tests of welding procedures and for qualifying welding<br />
operators ?
28. What is a fillet weld & what is the throat of a weld ?<br />
29. What is porosity as used in welding ?<br />
30. In performance qualification of pipe groove welds to ASME Section IX, which position<br />
requires more than two guided bent specimens for qualification ?<br />
31. Name four causes of undercutting during the welding process. Give four methods of<br />
correction.<br />
32. A welder has been tested in 6-G position, using an E-7018 F-4 electrode, on 6” sch 160<br />
(.718” nom.) SA 106-B pipe. Is this welder qualified to weld a 2” 300# ANSI schedule 80<br />
bore flange to a 2” schedule 80 SA 106-B nozzle neck ?Explain your answer<br />
33. You are reviewing a WPQ (QW-484) for a welder testing in the 6-G position, on SA-53<br />
grade B pipe (TS – 60,000 psi). the test results indicate the following :<br />
T1 - Tensile developed 61,000 psi, broke in the weld<br />
T2 - Tensile developed 66,900 psi, broke in base metal<br />
B1 - Transverse root bend satisfactory<br />
B2 - Transverse face bend satisfactory<br />
a) Would the test be acceptable ?<br />
b) Explain your answer.<br />
34. For ASME welders qualification tests:<br />
a) Will qualification on pipe for all positions also qualify the welder to weld all positions<br />
on plate ?<br />
b) How may a welder who fails on one or more test specimens be retested immediately<br />
35. For ASME welders qualification tests:<br />
a) In Welding Procedure Qualification, if a tension test breaks in the plate, is it<br />
acceptable?<br />
b) A Welding Procedure Specification qualified on groove welds. Is the Welding<br />
procedure Specification also qualified for weld repairs to groove welds and for weld<br />
built up ? Explain your answer !<br />
36. a) What steps are necessary to qualify a welder for all position pipe welding<br />
b) A nozzle will be attached to the shell at the top side, the shell is in horizontal fixed<br />
position. What is the minimum welder position required ?<br />
37. In performance qualification of pipe groove weld 6G position, 2 side bend tests were taken<br />
from the test coupon. A 1/16” open defect found on one of these two specimens. Is the<br />
welder pass the qualification test ? Give reason for your answer.<br />
38. In Welding Procedure Qualification, tension test breaks in the weld metal at 97% of<br />
specified tensile strength of the base metal. Is the test satisfactory ?<br />
39. What is the meaning of the third digit in the mild steel covered arc welded electrode E -<br />
7018 ?<br />
39. In performance qualification of groove welds using SMAW. Is the test coupons may be<br />
examined by radiography? Explain your answer!
40. A Welder Qualified by 8” Sch 80 pipe (0.500"thk.) in 1G position, Is he qualified to weld a<br />
0.750” thk. plate in horizontal position ? Why ?<br />
41. A Welder Qualified using E-7028 electrode, is he qualified to weld using E-6010 electrode<br />
Why ?<br />
42. Plate 0.5” thk. In Flat position has been used toqualify a WPS. Is this WPS can be used in<br />
production welding on 8” pipe 1” thk. Horizontal fixed position ? Why ?<br />
43. A Qualified WPS without PWHT has been used in production welding of Pressure part.<br />
The complete production welds are subject to PWHT according to Code requirements.Is<br />
the weld acceptable ? Why ?<br />
44. Reviewing the PQR No. 03 for Base Metal (QW-403), which of the following is most<br />
applicable?<br />
Anda me review PQR No. 03 untuk base metal (QW- 403). Pilihlah yang paling tepat dari<br />
pernyataan berikut<br />
a. All required, applicable, essential variables are defined on the PQR and are within the<br />
limitations set by WPS<br />
Semua variable esensial telah dicantumkan dalam PQR dan masih dalam limitasi<br />
yang tertera pada WPS<br />
b. The are no required, applicable, essential variable for the QW-250 rules,<br />
Sesuai dengan QW-250, tidak ada esential variable yang dipersyaratan<br />
c. One or more required, applicable, essential variables has not been listed on the PQR<br />
Satu atau lebih essential variable itdak dicantumkan dalam PQR.<br />
d. One or more of the required, applicable, essential variables listed exceed the<br />
imitations set by WPS<br />
Satu atau lebih essential variable melebihi limitasi yang tertera pada WPS<br />
45. Reviewing the WPS No. 04 for Filler Metal (QW-404), which of the following is most<br />
applicable?<br />
Anda me review WPS No. 04 untuk Filler metal (QW- 404). Pilihlah yang paling tepat dari<br />
pernyataan berikut<br />
a. All required, applicable, essential variables are defined on the PQR and are within the<br />
limitations set by WPS<br />
Semua variable esensial telah dicantumkan dalam PQR dan masih dalam limitasi<br />
yang tertera pada WPS<br />
b. The are no required, applicable, essential variable for the QW-250 rules,<br />
Sesuai dengan QW-250, tidak ada esential variable yang dipersyaratan<br />
c. One or more required, applicable, essential variables has not been listed on the PQR<br />
Satu atau lebih essential variable itdak dicantumkan dalam PQR.<br />
d. One or more of the required, applicable, essential variables listed exceed the<br />
imitations set by WPS<br />
Satu atau lebih essential variable melebihi limitasi yang tertera pada WPS
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