examine (one) on (something)
To test one on their knowledge in a particular subject or area. A noun or pronoun can be used between "examine" and "on." The department head will examine you on all literature from the Restoration through the Victorian age.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
examine someone on something
to give someone an examination covering certain material. I will have to examine you on this chapter myself. The teacher examined Larry on his understanding of phonetics.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.