The PEB is given when you arrive within the first three to four days. Most agencies require the 25 passing score the only one that I know doesn't is BOP. I think it depends once again on the agency if you have to pass at the start or the end, I know some require passing it throughout the entire time you are there.

Understanding the Context

Best thing I can tell you is contact your agency and find out from them. "why" can be compared to an old Latin form qui, an ablative form, meaning how. Today "why" is used as a question word to ask the reason or purpose of something. This use might be explained from a formula such as "How does it come that ...".

Key Insights

If you meet an old friend of yours, whom you never expected to meet in town, you can express your surprise by saying: Why, it's Jim! This why in the ... 11 Why is it that everybody wants to help me whenever I need someone's help? Why does everybody want to help me whenever I need someone's help? Can you please explain to me the difference in meaning between these two questions?

Final Thoughts

I don't see it. Why is a just a rather odd wh -word. Its distribution is very limited -- it can only have the word reason as its antecedent, and since it's never the subject it's always deletable. Consequently it behaves strangely, as you and others point out. Can "why" be a conjunction? - English Language & Usage Stack Exchange Why have a letter in a word when it’s silent in pronunciation, like the b in debt?

Can anyone please clarify my uncertainty here?