Never discuss a grade when you are angry. A test may have seemed unfair to you, but don t label it as such when you re discussing it with the professor. Be specific but courteous when making your points. Remember, regardless of how skillful your arguments are, the odds are that your grade won t be changed on that particular test. But, if you make your points well, the next test may be much better constructed and may seem to you to be a fairer measure of your knowledge of the material.
Most professors are experts in their fields.
Many of them are not experts in psychometrics or applied learning. Realizing that very few of them have had formal training in test construction or in how to teach may help you to understand their occasional shortcomings in these areas. Most good professors have gotten that way by trial and error. Improved teaching often depends on the kind of feedback they receive from students. Avoid being negative in your comments.