A DPE offers a suggestion to consider: Chapter 12 of the Aviation Technician Handbook General (FAA-H-8083-30) as a resource for you, your applicants and pilot contacts.

He saw it used successfully by an instructor applicant on a practical test.  It provides additional structure and information to better understand and access regulations on general and maintenance procedures and documents.

Download the PDF here: http://www.faa.gov/regulations_policies/handbooks_manuals/aircraft/amt_handbook/media/FAA-8083-30_Ch12.pdf