aryton,
Steve T. and Fred gave you excellent information. I'm from Pennsylvania. December 19, 1988 I took my Master Electricians Examination. It was similar to what you described. Extremely difficult. If I didn't prepare for months I wouldn't of had a chance of passing it. I purchased study material. Get to know certain code tables real well. ie. conduit fill, calculating service size etc. Do the sample calculations over and over again until you feel comfortable.
Don't be so hard on yourself. Preparation is the key.
