Download or read book CDL Study Guide: Combination Vehicles written by CDL Digest and published by CDL Digest. This book was released on with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: This CDL practice test study guide contains information for those drivers who operate a combination of vehicles with a GVWR of 26,001 or more pounds provided the GVWR of the vehicle(s) being towed is in excess of 10,000 pounds GVW, which includes ALL Class "A" license applicants. Combination Vehicle written exam practice test questions and answers.