Definately. if you believe the inspector is incorrect, point out to him why you believe him to be incorrect. BUT, you better be right and know exactly where it says he is incorrect. I use the format of "The way I understand FAR 135.XXX, Order 8400, Volume 2, Chapter 6, I can do this and this" You can find Order 8400 on the web. It is the guidance for Air Carrier Inspectors. Sometimes I am right and some times I am wrong. But you will surprise most Inspectors by knowing about Order 8400. There is a great deal of information about the conduct of checkrides. How manuvers must be conducted and what is passing. Also before you do the flight portion of the checkride, sit down with the inspector and discuss what manuvers will be done and how you and he will perform manuvers. Primarily things like VMC demos, engine failures on takeoff and SE approaches. While Inspectors tend to be very conservative, every once in awhile one has a wild method of doing manuvers. If you believe that the method he will use is unsafe or could damage the aircraft, tell the inspector that and bring your Chief Pilot into the discussion. While your Chief Pilot and the Inspector may determine that the method used is safe, you have shown yourself as a safe pilot who is able to think for himself and is not afraid to say no and get a second opinion.
When I give checkrides, I consider not only the pilot's total time, but also seat position, is it an initial or recurrent ride, how much 135 experience does he have and so on. And the oral is based on thoe items. So an oral for a 700 pilot for an initial SIC BE90 ride is very different from a oral for a 10,000 hour pilot for a recurrent PIC Learjet and he has been flying 135 for many years.
Just keep in mind, many pilots are afraid of the FAA. Most of the inspectors do not fly regularly, very likely do not have any experience in your type aircraft and put their pants on one leg at a time. So just relax and do your job.