The location for the commercial driver’s license exam depends on the state. It is usually either a Commercial Driver's License office or the Department of Motor Vehicles office. In Nevada, drivers must take the exam at an approved CDL office.
The Nevada DMV website offers a list of CDL offices in different cities and counties in the state. This information is also available by going into the local DMV office and asking about the test. The website provides manuals and practice tests for the CDL exam.
In California, the permit for a CDL license is first acquired from the local DMV office. After getting the permit, the driver fills out an application for the CDL exam and pays the application fee. He then makes an appointment to take the test at the DMV or a local CDL office.