CFII checkride
 

Hi. Doing my CFII and had the checkride for just 3 days ago. Failed the oral because of not being able to present alot of correlation based questions. I got some now but still finding for some more to be on the safer side. Anyone can help me out on this. Correlation questions which involves scenario and alot of regulations to think about. Thanks in advance.

what inst fails when vac gauge reads zero? why?
Alternator fail, what are indications? why? pull field cb? why? reduce load? why?
Alternate na, why? ADF required? why? no time to map, why?
t/off mins nonstandard, why? mra, why? maa, why? msa, what's it for?
oroca, what's it for? limitations? gps, can we use it? enroute? approach? alternate?
Dme, limitations? substitute? ssv, what are they? do they apply to us 91?
stepdown fix inside faf, why only one? do minimums change? why?
circling not auth, why? cat c/d, why?