Those tests are expensive to make, and determine the pass scores. Engineering exams cost over $100K per question. I bet the medical exam questions would cost nearly the same.
Actually, in the January/February 2012 issue of PE Magazine published by NSPE, they answer the question, "How much does a question on the various engineering licensing exams cost?" as follows:
FE Exam Item $2,472
PE Exam Item (Group I Exams) $2,921
PE Exam Item (Group II Exams) $2,322
SE Exam Item (Multiple Choice Items) $2,921
SE Exam Item (Free Response Item) $18,083
*Calculation includes travel expenses, subject-matter experts' time, psychometric costs, and office and personnel costs
Do I get g33k points for knowing this?