CDL - Combination Vehicle Practice Test (Guaranteed Pass!)

A tractor with a(n) ________ trailer requires the shortest amount of stopping distance . 1. empty 2. fully loaded 3. lightly loaded correct answers fully loaded The air leakage rate for a combination vehicle ( engine off, brakes on) should not be more than _____ psi per minute . 1. 4 2. 6 3. 2 correct answers 4 If you do not do the final air brake check for air leaks and fix them before driving, 1. you could lose your brakes while driving 2. your fuel usage will increase 3. tire pressure will drop correct answers you could lose your brakes while driving Which part of the kingpin should the locking jaws close around? correct answers The shank Glad hands are used to connect the .... 1. kingpin from the trailer to the locking jaws of the fifth wheel 2. electrical lines from the tractor to the trailer 3. service and emergency air lines from the truck or tractor to the trailer correct answers service and emergency air lines from the truck or tractor to the trailer Trucks roll over more easily when fully loaded and are 1. ten times more likely to roll over in a crash than empty rigs 2. five times more likely to roll over in a crash than empty rigs 3. two times more likely to roll over in a crash than empty rigs correct answers ten times more likely to roll over in a crash than empty rigs In general, the higher your trucks center of gravity, the ... 1. easier it is to turn over 2. more stable it is when turning 3. easier it is to turn around corners correct answers easier it is to turn over