California CDL Combination Vehicles Test case studies
California CDL Combination Vehicles Test · Put your knowledge to work in context.
The California CDL Combination Vehicles knowledge test is one of the written exams a commercial driver's license applicant takes at a DMV office. It is aimed at drivers who will operate a tractor-trailer or other vehicle combination, and it is generally taken alongside the general knowledge test and any endorsement tests that apply to the job. The California CDL Combination Vehicles Test case studies are 5 cases and about 2,382 words.
1Pre-Trip Air Pressure Loss on a Loaded Tractor-Trailer
You are conducting a pre-trip inspection on a three-axle tractor pulling a tandem-axle van trailer. The engine has been off for 45 minutes and the system is fully charged at 120 psi.
461 words, about 2 min2Coupling to a Trailer with a High Fifth Wheel
You are coupling a day cab to a loaded flatbed. The tractor's fifth wheel is set at the high mounting position, and the trailer's kingpin plate sits about 6 inches lower than the fifth wheel's throat when the tractor is backed straight in.
526 words, about 3 min3Descending a Long Grade with a Heavy Combination
You are driving a tractor pulling a set of doubles, gross combination weight 78,000 pounds, on a two-lane mountain road. The descent is 6 miles at 6 percent.
453 words, about 2 min4Off-Tracking on a Tight Right Turn
You are driving a 53-foot trailer with the tandems set all the way to the rear, gross weight 76,000 pounds, through an older urban intersection. You need to make a right turn from a two-lane road onto a two-lane road.
450 words, about 2 min5Uncoupling on an Uneven Yard
You need to drop a loaded van trailer in a gravel yard. The spot you are given slopes about 3 degrees from left to right and about 2 degrees from front to back, with the nose pointing uphill.
492 words, about 2 min