Make flashcards of every switch, dial or gauge in the cockpit. For ex. it could be as simple as the Batt Master Switch. Draw the switch on the front of the card with the two selected settings ON and OFF. On the back of the card answer what happens when the switch is selected to ON or OFF. Do this for every switch. This may sound mundane and simple but I've done it for every transport category plane I've ever flown SF340 through 767. I've never had a problem on an oral. There will be other scenarios involving systems peculiar to each airplane that instructors and check airmen emphasize but if you know the Memory/Recall items, limitations and the switch descriptions you will pass any oral exam whether SIC or PIC Type. Good luck.