As a further addition to this question...
Reduce your workload with this one. With the RMI, both VOR and ADF representations behave in the same way (except for ADF dip). Try to understand what the instrument is doing purely in the ADF context and accept that VOR questions are the same in process.
Temporarily forget there is [probably] an HSI and OBI in front of you!
The following link is an excerpt from the book:
Never Get Lost. It is a teaser to tempt you into buying the whole book, but it illustrates what I was saying in the earlier posting.