MI CDL General Knowledge case studies
MI CDL General Knowledge · Put your knowledge to work in context.
The Michigan CDL General Knowledge test is the core written knowledge exam that anyone applying for a Michigan commercial driver's license must pass before moving on to endorsement tests and the skills (road) test. It is aimed at drivers who plan to operate Class A, Class B, or Class C commercial vehicles - tractor-trailers, straight trucks, tank vehicles, and certain passenger and hazardous-materials operations. The MI CDL General Knowledge case studies are 5 cases and about 2,832 words.
1Brake Fade on a 6 Percent Grade
You are driving a 78,000-pound tractor-trailer down a 6 percent mountain grade that continues for 6 miles. The road is wet, the temperature is 34°F, and light rain is freezing on your mirrors.
624 words, about 3 min2Shifted Lumber Load at a Fuel Stop
You are 120 miles into a 400-mile run with a 40-foot flatbed carrying 20 bundles of treated lumber, each bundle 40 feet long, 8 feet wide, 2 feet high, and about 2,400 pounds, for a total of 48,000 pounds. The load is covered with a tarp and secured with 6 chains and 4 straps.
565 words, about 3 min3Air Leak Test Fails in Cold Weather
At a pre-trip inspection on a 2019 tractor-trailer with dual air circuits, you build pressure to 120 psi and shut the engine off. With the parking brake released and the service brake fully applied, the gauge drops from 120 to 114 psi in the first minute and to 108 psi in the second.
516 words, about 3 min4Pre-Trip Defects at 04:30
You are the driver of a 33,000-pound GVWR straight truck with hydraulic brakes and a vacuum booster. At 04:30, with the temperature at 18°F, you start the pre-trip.
582 words, about 3 min514-Hour Window and a Pushy Dispatcher
You are a solo driver who reported for duty at 05:00 at the terminal. Your electronic log shows a 30-minute pre-trip, 2 hours 30 minutes of driving, 1 hour loading, 3 hours of driving, a 30-minute lunch, 3 hours of driving, and a 30-minute fuel stop.
545 words, about 3 min