to those pics ...and yes, believe it or not, I have never 'had' to take a qualification test.
On the 7016 question, I have not heard of them. We are still 6010 root and mostly 8010 on out depending on pipe grade. This new 42" passing about a 1/2 mile away from the house must be at least X-52. I am anxious to see if any wire machines are used.