Even though there are some pretty big differences between structural welding and pipe welding certification tests, there are also some common denominators. Here are a few tips that apply to both pipe welding tests as well as structural plate tests.

It is never a bad idea to call the test supervisor before your test date to get all the details possible.
Ask questions before the test begins so that you will be clear on the expectations of the test supervisor
get permission first, but try to get a piece of scrap metal to weld on so that you can get used to the equipment and to set the welding machine before you light up on the real deal.
keep all the arc strikes in the weld so that they will be covered by the weld. No welding codes allow arc strikes outside the weld.
keep grinding marks and chipping hammer marks confined to the beveled groove area . leaving chipping hammer pecks all over the place is like tattooing the word "Hack" on your forehead
dont leave any slag on the finished product...file and brush, file and brush
spread your stops and starts around so that they are lumped in the same area
a little soapstone followed by a good power brushing makes for a weld that shines like new money

If you have never taken a welding certification test before, you may not realize what is at stake. Usually , getting the job or not getting the job completely depends on your ability to pass the test. No pressure...So be prepared to be a little nervous. Because like it or not, In the back of your mind you will think about breaking the bad news to your wife or girlfriend if you fail.

You are gonna be a little nervous. Be ready for it. Even after over 30 years of welding, I still get nervous.

The best way to not be nervous is to be practiced up for the test. If you called the super beforehand and have practiced the exact test you will be taking, your chances of passing are much better and your brain will know it.