I definitely was all over page 7-2. Searched the entire manual, the only explanation for STBY function is "Cancels all selected flight guidance modes." Ditto the systems manual. Gets kind of frustrating trying to find info that isn't there, especially when I know keeping my job depends on getting these questions right. More than a handful of questions that lack a direct/clear answer based on the material I've been given. Perhaps my resourcefulness is part of the test? Gonna look around the web for a Dehavilland or Flight Safety manual. Thanks for the help guys.