Tank vehicle endorsement (only if testing and or training in tank vehicle).Any time you upgrade your CDL by moving to a higher commercial class or adding endorsements that require a skills test.
You must pass the knowledge test to get a Commercial Learner's Permit (CLP). See Getting a CDL for the list of required documents you'll need to bring with you. The test fee covers one attempt at each knowledge test taken within 90 days of the receipt. Make an appointment to take the knowledge test at a driver licensing office location that offers testing. You may also take the practice test for a sample of the types of questions that will be on the test. In the first chapter, you will find a table titled 'What sections should you study?' This table indicates with an 'x' which section(s) you should study before taking the tests. The guide is only available in English and contains all the information you'll need to pass the test.
Study the Commercial Driver Guide to prepare for the test. Note: language interpreters aren't allowed. The knowledge test is available in four languages:
