AWS-CWI PRACTICALMeasurement & Evaluation : Hands-on-test

Page 01 of 04

Answer the following questions, based on the examination and measurements conducted on the simulated weld specimens in the class, Use the instrument kit supplied.Refer to Book of Specifications for acceptability requirements

1. If the simulated porosity (drilled holes only) in the segments A1 and A2 of the T joint fillet weld specimen is randomly distributed in a length of 12 inch weld, the weld isa. acceptable, because the pores are distributed randomlyb. acceptable, because the pores are too finec. not acceptable, because the pores are too bigd. not acceptable, because the diameters of the pores are higher than the permissible limitse. not acceptable, because the diameters of the pores are smaller than the permissible limits

2. If the simulated porosity (drilled holes only) in the segment B1 of the T joint fillet weld specimen assume the pore diameter is 1/64 inch) is found linearly, in a length of 1 inch, the weld is a. acceptable, because the pores are very smallb. not acceptable, because the pores are linearc. acceptable, because the total diameters of pores are within the permissible limits

d. acceptable, because the total diameters of pores are only slightly higher than the permissible limitse. none of the above

3. Assume that each porosity (drilled hole only) in the segment B2 of the T joint fillet weld specimen is 1/32 inch. If this porosity is found clustered in a length of 1/2 inch, the weld is a. acceptable, because the total diameters of pores are within the permissible limitsb. not acceptable, because the pores are found clusteredc. acceptable, acceptable, because the pores are too fine and small

d. acceptable, because the total diameters of pores are only slightly higher than the permissible limitse. none of the above

4. Assume that the diameter of each porosity (drilled hole only) is 1/64 inch in segment B1, 1/32 inch in segment A1, 1/32 inch in segment B3 of the T joint fillet weld specimen. If this porosity is found randomly in 12 inch length of weld, the weld is

a. acceptable, because the pores are distributed randomly b. acceptable, because the total diameters of the pores are within the permissible limits for 12 inch length

weldc. not acceptable, because the diameters of the pores are higher than the permissible limits for 1 inch

length weldd. a and be. none of the above

5. The simulated bend test specimen A is one of the specimens for the qualification of a welder. There is no evidence of slag or fusion type discontinuity below the crack in the bent specimen..

Based on the evaluation of this specimen, a.the welder is qualified, because corner crack need not be considered.b.the welder is qualified, because opened up discontinuities are within the permissible limitsc.the welder is not qualified, because corner crack is bigger than the permissible limitsd.the specimen is disregarded and another specimen shall be testede.none of the above

Page 02 of 04

6. Evaluating the simulated bend test specimens B & C in a welder qualification test, the welder is a.qualifiedb.not qualifiedc.the specimen is disregarded and another specimen shall be tested

7. In the simulated groove weld specimen, the maximum depth of undercut isa.there is no undercut, only underfill b.1/16 inchc.1/64 inchd.1/32 inche.none of the above

8. For the simulated groove weld specimen, assume that the weld axis is transverse to the primary stress. Based on the measurement of undercut, the weld would bea.acceptable, because the depth of undercut is negligible b.not acceptable, because undercut is not permissible when the weld axis is transverse to the

primary stress c.not acceptable, because the undercut is very deepd.acceptable, because the depth of undercut is within the permissible limitse.not acceptable, because the depth of undercut is above the permissible limits

9. In the simulated groove weld specimen, the maximum weld reinforcement isa.there is no weld reinforcement, only underfill is observedb.less than 1/32 inchc.between 1/32 inch and 1/8 inchd.above 1/8 inche.none of the above

10. In the simulated groove weld specimen, the primary stress is parallel to the weld axis. Starting from the right end of the weld, evaluate the first 1 inch of the weld. Based on the weld reinforcement, the weld is a.not acceptable, because excess weld reinforcement will reduce the fatigue strength of the weld

joint b.acceptable, because excess weld reinforcement is always goodc.acceptable, because the weld reinforcement is within the permissible limitsd.not acceptable, because there is no weld reinforcement, only underfill is observed e.not acceptable, because the weld reinforcement is higher than the permissible limits

11. Refer the simulated lap joint specimen B, side 3. Visually examine the weld for a length of 1 inch, at a distance of 3 inch on the bottom plate, from the left hand side. what is the discontinuity observed ?

a.arc strikeb.spatterc.slagd.a and be.all of the above

12. Based on the visual examination of the weld on side 3 of the lap joint specimen B, as above, the weld would be

a.acceptable, because the discontinuity is very smallb.acceptable, because the discontinuity is within the permissible limitsc.not acceptable, because the discontinuity is above the permissible limitsd.not acceptable, because this discontinuity is prohibitede.none of the above

Page 03 of 04

13. In the simulated lap joint specimen B, what is the discontinuity on the right hand side corner on side1 ?

a. undercutb. slagc. overlapd. arc strikee. none of the above

14. Based on the visual examination of the weld on side 1 of the lap joint specimen B, as above, the weld would be

a.acceptable, because the discontinuity is very smallb.acceptable, because the discontinuity is within the permissible limitsc.not acceptable, because the discontinuity is above the permissible limitsd.not acceptable, because this discontinuity is not permiitede.none of the above

15. In the simulated lap joint specimen B, what is the discontinuity, approximately at the center of the weld, on side 4 ?a.poke markb.overlapc.arc striked.overlape.none of the above

16. On the even numbered side of the simulated T joint fillet weld specimen, the weld is running parallel to the primary stress. As per the drawing, the fillet weld size is 1/2 X 1/2 . (Ignore the porosity and other discontinuities). Measure the size of the fillet weld over 1 inch length, from the left hand side. Based on the weld size, the weld would be a.acceptable, because the actual weld meets the size requirements specified in the drawingb.acceptable, because porosity and other discontinuities can be ignoredc.not acceptable, because the actual weld size is smaller than the dimension specified in the

drawingd.not acceptable, because the weld contains severe porositye.none of the above

17. For the simulated T joint fillet weld specimen, the fillet weld size is 1/2 X 1/2 , as per the drawing, What is the maximum permissible convexity ?a.1/16 inch b.1/8 inchc.3/16 inchd.1/4 inche.none of the above

18. On the odd side of the simulated T joint fillet weld specimen, as per the drawing, the size of the fillet weld is 1/4 X 1/2 . (Ignore the porosity and other discontinuities). Based on the weld size, the weld would be

a.acceptable, because the actual weld meets the size requirements specified in the drawingb.acceptable, because porosity and other discontinuities can be ignoredc.not acceptable, because the actual weld size does not meet the dimension specified in the

drawingd.not acceptable, because the weld contains severe porositye.none of the above

Page 04 of 04

19. On the even side of the simulated T joint fillet weld specimen, as per the drawing, the size of the fillet weld is 1/4 X 1/4 . (Ignore the porosity and other discontinuities). Based on the weld size, the weld would bea. acceptable, because the actual weld meets the size requirements specified in the drawingb. acceptable, because porosity and other discontinuities can be ignoredc. not acceptable, because the actual weld size does not meet the dimension specified in the drawingd. not acceptable, because the weld contains severe porositye. none of the above

20. Examine the simulated unbroken transverse tensile test specimen. Assume that this specimen has fractured at a load of 17,500 pounds, during a procedure qualification test. What is the tensile strength ?

21. Where will the answer to question No. 20 be entered in Appendix I ?a. line 1b. line 21c. line 24d. line 27

22. Assume that the above specimen is taken from the welded plate of ASTM A516 grade 70 for procedure qualification test. Based on the tensile test result above, the procedure isa.qualified, because the value is higher than the minimum tensile strength requirement of the

base metalb.qualified, because the value is higher than the minimum yield strength requirement of the base

metalc.not qualified, because the value is lower than the minimum tensile strength requirement of the

base metald.not qualified, because the value is lower than the actual tensile strength of the base metale.qualified, because the value is higher than the actual tensile strength of the base metal

AWS-CWI PRACTICALMeasurement & Evaluation : Hands-on-test