Failed my CLP Tests!

I think you get 3 chances on all of the written tests. I had to retake special requirements in Texas because some of the material was obscure, like which year of manufacture must a trailer be in order that it needs more than one tail light. Crap like that.

Just study and keep hammering, you'll get it.

 

Do the practice tests on this site. A lot. Like, just start them and don't stop. I didn't open the book once, just did these practice tests until I was acing them every time. Got all my endorsements that way

 

Not sure what state you are in, but Cali I tested for all my endorsements at once. Cali DMV allows you to take a test, take a break (Means go out and study for the next one), come back in, take the next test, then take another break. You can take as many breaks as you want, you just have to make sure that the last test you are taking is started 30 minutes before DMV closes and you are good to go.
I took a break before my HazMat test, went down the street to McD's and had a cup of coffee and read the Handbook. Went back to DMV when I was ready and took the test. I have a P endorsement on my Class B, they made me take it again, same thing, take a break, study, then go back in when you are ready.