Oklahoma CDL Combination case studies
Oklahoma CDL Combination · Put your knowledge to work in context.
The Oklahoma CDL Combination knowledge test is the written exam a driver takes to add combination-vehicle authority to a Commercial Driver's License. In practice this means Class A: a tractor-trailer or truck-and-trailer setup where a towed unit exceeds 10,000 pounds. The Oklahoma CDL Combination case studies are 5 cases and about 4,121 words.
1Pre-Dawn Pickup: A Low Trailer, a Loose Release Handle, and a Late Fee
You are dispatched at 0345 from a yard in Oklahoma City to pick up a loaded 53-foot dry van for a 0600 delivery in Tulsa. The trailer has been sitting on a gravel lot since yesterday; the overnight low was 28°F, and the landing gear has settled so the kingpin plate rides about 2 inches lower than your fifth wheel's grease plate.
851 words, about 4 min2The 25-mph Ramp Taken at 45: Loaded Van, Wet Pavement
You are eastbound on I-40 near Henryetta, Oklahoma, at 2130 in light rain. Your rig is a 5-axle tractor-semitrailer; the trailer is a 53-foot van loaded with palletized bottled water, about 43,000 pounds of payload stacked nearly floor to ceiling, so the load's center of gravity is high.
771 words, about 4 min3Leak-Down Test Fails Twice and the Trailer ABS Lamp Stays On
It is 0610 and 34°F at a terminal in Tulsa. You are doing the pre-trip on a 2016 tractor pulling a 2012 53-foot dry van that has been parked since yesterday afternoon.
832 words, about 4 min4The Tight Right Turn: Tandems Forward, a Pole, and a Helpful Pickup
You are delivering to a farm supply store on a two-lane US highway through a small Oklahoma town. The turn is from a 12-foot-wide lane onto a 24-foot-wide cross street.
850 words, about 4 min5Overweight Steer Axle, Forty-Two Feet of Lumber, and a Box of Chains
You are at a shipper's dock in Catoosa, Oklahoma, with a 3-axle tractor and a 53-foot flatbed with sliding tandem axles. The load is 42-foot-long bundles of treated lumber, 30,000 pounds total in six banded bundles.
817 words, about 4 min