Never could make sense of the itemized scores on individual topics. I remember my lowest score was on Sub-arc. I had hundreds of hours on various machines, thin walled pipe, heavy/thick castings and with stainless, 4140, and Hastelloy wires and base metals. I'd never have guessed THAT would be my Achilles Heel.
This being said, I have no earthy idea how Welding Performance could be evaluated on a written examination. I believe their scoring is based on incantations, tossed chicken bones, mystical formulae and blood red lines in a broken egg.
Review what you can on machine set ups and basic welding techniques. That's all I can come up with.
The good news is:
a) you only have to concern yourself with one section,
b) your familiar with the test layout, and...
C) YOU CAN BE HEADING HOME EARLY!