MA CDL General Knowledge case studies
MA CDL General Knowledge · Put your knowledge to work in context.
The Massachusetts Commercial Driver's License General Knowledge test is the core written knowledge exam that Class A and Class B applicants must pass before they can be issued a CDL learner's permit and begin behind-the-wheel training. It is written for people who intend to drive tractor-trailers, straight trucks, dump trucks, buses, or other heavy vehicles for pay, and for current drivers adding a classification. The test samples the full breadth of commercial driving: pre-trip inspection and basic control, shifting, backing and turning, seeing and communicating, speed and space management, skid control and braking emergencies, cargo securement, hazard awareness and railroad crossings, alcohol and driver fitness, vehicle systems, hours of service and penalties, and Massachusetts-specific requirements and restrictions. Questions are multiple choice and reward careful reading rather than memorization of trivia. The MA CDL General Knowledge case studies are 5 cases and about 2,852 words.
1Wet Grade With Brake Fade
You are driving a five-axle tractor-semitrailer weighing 78,500 lb down a 6% grade on a two-lane state highway in western Massachusetts. The pavement is wet from light rain and the posted limit is 50 mph.
646 words, about 3 min2Low-Air Warning and Leak Test
During a pre-trip inspection on a Class A combination vehicle, you start the engine and let air pressure build. The governor cuts out at 120 psi and cuts in at 100 psi.
539 words, about 3 min3Dispatcher Pressure at the 14-Hour Limit
You are a Massachusetts-licensed CDL driver for an interstate carrier. You reported on duty at 04:30 and began driving at 04:45.
555 words, about 3 min4Steer Tire Blowout With a Full Load
You are driving a loaded five-axle tractor-semitrailer at 60 mph in the center lane of I-90 near Sturbridge, Massachusetts. Gross weight is 79,000 lb.
545 words, about 3 min5Securement and a Hump-Backed Crossing
You are hauling a flatbed loaded with three steel coils, each weighing 10,000 lb, on a 48-foot trailer. The coils are arranged in a row, each lying on its side with the eye horizontal, and are secured with four 2-inch nylon straps rated at 3,000 lb working load limit each.
567 words, about 3 min