and how many opportunities do I have to take the exam?
You can take the exam as many times as necessary until you pass the exam
How will I know if my application has been approved or not?
We will send you an approval notice along with instructions to go to a DMV office to obtain a CDL backed by HazMat. Your new CDL will display the expiration date of your CDL and the expiration date of your HazMat endorsement. The endorsement is valid for five years.