Yes, I am a Graduate Student.
You would have to find the MPN that you need whether it is a Direct Unsubsidized Loans, Direct PLUS Loans or both and would have to complete each one.
What exactly does the Mastery Promissory Note do?
It explains the terms and conditions of your loan and you may receive more than one under an MPN over a period of 10 years to pay your or your child's educational costs.