Is it unethical to give students a sample math test as a study guide? The students were never told this is the actual exam or this will be on the exam; my physics teacher used to give us the problems for the exam as a study guide and those were the exact problems on the test, if you studied that. 

If this is a coordinated course, do I get some autonomy and do as my physics teacher used to do?
I give a mock exam that gives example questions from the topics that are covered in the exam but not the actual questions themselves.

This enables specific words or formats etc to be used in the mock so that one is sure that the students cannot say that they have not been covered...

Edit based on my comment:

For the nine topics covered, there are 15 or so practice questions which are part of the "coursework" for each topic, so there is plenty of practice. The exam questions are based on any of those questions, with a different story, different numbers or part A is the same but part B is then different etc