Answer:
newdiv..in the 30 years of my time in the industry.most times the pipefitter test that was given when you hired on a job was made up by the different men or women.running that craft.so one job might have one test with many different questions than the other.taking the test to say you are a tradesmen would have to be what the written test is about.
just like all other crafts give a trade test in there own decipline.