CDL Practice Test - FREE DMV CDL Tests (2023) Practice for your CDL test, including all CDL endorsements. Train for FREE online with our Texas class B license test. A manuver performed by a tow truck to pick up an overturned truck. Practice with this sample test to get ready for the official CA DMV practice permit test.Number of Question 20 Passing Score 16 Number of Tests 20 1 . You'll have a time limit of 60 minutes to take and pass the test.