There is no simple answer about which type of test to take. Breath test machines do not retain a portion of the breath to be independently retested. However, there are many ways to impeach the accuracy of the machines.
While there are no strict CPA exam study requirements, the American Institute of CPAs (AICPA) generally recommends that exam candidates spend 300 to 400 hours preparing for the exam. However, the recommended amount of time spent studying for each exam section varies. study about 3 hours after I get off work everyday and about 8 hours a day on the weekend. I read all of these forums about people saying that 160 hours is more than enough time to study!
The CPA exam is offered during the first two months of every quarter, and typically over the course of several days. Candidates may take the test parts in any order they choose, but once they have passed one part, they must successfully complete the other three parts within 18 months.