Part B Examination Book of Specifications 1

[rooster59]

I am scheduled to take the CWI Exam in September and currently reviewing Part B. I had a question in Appendix VI about the sentence referencing butt joints shall be faired to adjacent plate or shape edges at a slope not to exceed 1 in 10.
I have an example question from REAL Educational Services about A plate 3" thick welded to a 1" thick plate and a transition is made between the two thicknesses. What is the minimum distance for the transition between the plates? The correct answer they have is B. 20". I know this is a simple fundimental math equation, but just can't come up with it right now. Any help on this would be appreciated.
Thanks
A. 30"
B. 20"
C. 15"
D. 10"
E. 5"

 

[phighfill]

You have a 2" transition difference. With the slope "not to exceed 1 in 10", then 2 x 10 = 20".

 

[rooster59]

Thank you for the quick response. I thought that was the way the calculation was being expressed, but just wanted to make sure. I assume you are already a SCWI or CWI and work in the industry. I have all my API Certifications (510, 570, and 653), but not tested through AWS. I am preparing for the CWI exam Sept 15th and been studying pretty hard. I am doing the 1104 Code since I work in a chemical plant. Is the Practical as bad as everyone makes it out to be? Also if I had a couple more questions would you be ok with helping?
Thanks again
Greg Emerson

 

[phighfill]

I did not think the practical was that bad, but with enough experience you should be prepared. It does not matter where you work or what code you use (1104 being the easiest) the CWI cert does not specify any difference. Keep going with the questions. I will try to help.

 

[rooster59]

I have another question from Real (Part B): What is the maximum root opening that could be acceptable during a fit up inspection on a butt joint using prequalified joint designation B-L2a-S?
Thanks
A. 1/4"
B. 1/2"
C. 5/16"
D. 9/16"
I come up with the maximum of 1/2", but they have the 9/16" as the correct answer. I see the Tolerances (As Fitup +1/4,-1/16). The -1/16 I thought would go towards the 1/4, meaning a minimum of 3/16.
What do you think am I looking at it wrong
Thanks

 

[phighfill]

The B-L2a-S joint designation shows the root opening to be 5/8". With the "as fit" tolerances of +1/4, -1/16 you have 7/8" to 9/16" respectively.

 

[phighfill]

My bad, reading the wrong joint designation. Your answer is correct with the 1/2" max

 

[rooster59]

OK, Thanks I was just getting ready to respond about that. Makes you wonder about the prep course answer sheets. Thanks again for your help.