can anyone coach me through the classes if I need help
your G3 will be focused on the colour pages of your codebook, the ammendments, and the code itself. my advice to you is to used your table of contents at the front of your codebook and the index at the back looking for keywords.
you will pass the G3 if you know how to use your codebook.
the piping diagram will be a single pressure zone with fittings already considered. just find your longest measure run put a ruler along it and be sure the top of your table corresponds to the pressure your deal with. beware there are tables for pipe and tables for copper. natural gas is annex A, propane Annex B.
the exam is 3.5 hours so use that time to your advantage. you will probably find more than 1 right answer, just one is more correct than the other so make sure your answer is word for word from the code.
goodluck
There was a shortage of new people entering the trade a number of years ago. Since then, the standards for acquiring a license have changed. The government is making it easier for people with a minimal amount of training to work in the field, which is good in some ways if there is supervision. Since standards, licensing and educational requirements have all changed, small private educational firms have started offering the coarses, and aggressively marketing the education. Today, there are many, many G3s in the trade. Many of them give up after awhile. They find it too hard to get a decent job that is dependable and pays well. You stand a better chance if you are very tech and mechanically savvy. These coarses cost quite a bit of money today. Make sure you know this is what you want to do before you pay the tuition.