The test pieces are: Butt Weld in the flat, Lap Fillet in the vertical, Tee Fillet in the vertical, Butt Weld in the vertical and Tube to Plate in the horizontal/vertical. If using 1.5mm to 2.0mm sheet, the vertical welds can be either up or down. With thicker sections the welds must be made 'upwards'. This will ensure much better penetration as the heat input is higher, (it's slower). You may need to develop a technique to avoid the weld from dripping off the plate or under-penetrating. There are also underpinning knowledge questions to answer which will include Health & Safety and Process Knowledge.
I've been teaching and assessing these qualifications for some years at Birmingham Metropolitan College. We cover the whole 3268 qualification from levels 1 to 3.
I'm also the Vice Chairman of the West Midlands Branch of The Welding Institute.
Just as Dave said, you gain the basic skills required to get into welding. I was welding for about 5 years before I took the C&G level 1 and 2 course and I learned loads that I have never even thought about. You will learn lots of theory and I found that to be the most useful part of the course. Hope you get the course and good luck