Hello all-
Getting ready for the CWI test next month without taking the review class and I could use a little help on a couple of questions, if I may?

This question is on the  1 Jan 2016 version BOS, Table 1, Visual Inspection Acceptance Criteria regarding porosity.
The table reads as follows:

(8) Porosity
(A) CJP groove welds in butt joints transverse to the direction of computed tensile stress shall have no visible porosity. For all other groove welds and for fillet welds, the sum of the visible porosity 1/32 inch or greater in diameter shall not exceed 3/8 inch in any linear inch of weld.
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(B) The frequency of porosity in fillet welds shall not exceed one in each 4 in of weld length and the maximum diameter shall not exceed 3/32 inch. Exception: for fillet welds connecting stiffeners to web, the sum of the diameters of porosity shall not exceed 3/8 inch in any linear inch of weld.
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(C) CJP groove welds in butt joints transverse to the direction of computed tensile stress shall have no porosity. For all other groove welds, the frequency of porosity shall not exceed one in 4 inches of length and the maximum diameter shall not exceed 3/32 inch.
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Question #1 – am I correct to presume the test question will provide information on the "direction of computed tensile stress" ?  or will we have to compute tensile stress and identify the direction ourselves? 

Question #2 -   the BOS table 1 requirement (A) states, "no visible porosity" for butt joints; well what does "no visible” mean?  The second sentence states 1/32” as a chargeable minimum size applied to all other groove and fillet welds  -  is the test taker expected to use this mention of  1/32” as the low limit of what they mean by “no visible porosity” for butt welds also?  So I guess I am really asking how will a typical Part B question read which requires judgment of  "no visible porosity".

Question #3 – similar to question 2, BOS table 1 requirements (B) & (C) for cyclical and tubular joints also requires consideration of porosity counts where no minimum size is offered. These two requirements don’t even allow a notional limit of “visible” as an unidentified minimum so is it reasonable or expected to reach back to the 1/32” minimum size listed in (A) ?

Thank you for reading and any time or advice that is offered.
Regards,
Tom C