There used to be tons of info but when I went to do a search nothing appeared.
So....get ahold of the recommended study guide NLN pre-entrance exam 2nd Edition
by Mary E. McDonald. In it you will find exactly what the exam consists of.
Pass/Fail is determined by your school. Each school has a percentile that they are looking for to be considered passing. There was verbal/math/science in it. The exam is timed and no you cannot use a calculator.
The verbal consisted of reading comprehension, math was basic algebra and pre-algebra (lots of decimals and fractions). Science was a little bit of everything (Bio, Chem, A&P, Physics).
If you have any further questions that I may ansewer feel free to PM me.