I would not ask the examiner directly. However if you know anybody that has taken a check ride with that guy before ask them because most examiners don't change there check ride. I am shore that your instructor has prepared you well. Don't be nervous and most of all have fun. Don't think of it as a test think it just you flying with a new person. Remember the DPE is not there to fail you he is there to make shore that you can fly the airplane safely. If you don't know something do not BS the examiner just say you don't know and look up the answer. Anyway enough rambling on good luck and have fun.