Pennsylvania CDL General Knowledge case studies
Pennsylvania CDL General Knowledge · Put your knowledge to work in context.
The Pennsylvania CDL General Knowledge test is the written knowledge exam that PennDOT Driver and Vehicle Services requires before a candidate can move forward toward a Commercial Driver's License. It is aimed at drivers who intend to operate commercial motor vehicles - tractor-trailers, straight trucks, tank vehicles, buses, and combinations - and who need to demonstrate a working command of safe vehicle operation before skills testing. The exam is drawn from the Pennsylvania Commercial Driver's Manual, which PennDOT publishes under its Commercial Drivers section, and it tests the core knowledge that applies to every CDL holder regardless of endorsements: pre-trip inspection and vehicle systems, basic control and shifting, backing and turning, seeing and communicating with other road users, speed and space management, hazard perception, emergency maneuvers, railroad crossings, night and extreme-condition driving, cargo securement, and post-crash procedures. Endorsement-specific tests (air brakes, combination vehicles, tanker, hazardous materials, passenger, school bus) are separate written exams layered on top of this general foundation. The Pennsylvania CDL General Knowledge case studies are 5 cases and about 2,748 words.
1Air Brake Pre-Trip: Two Leak Tests Fail
A driver is assigned a 2018 three-axle tractor with a 53-foot van and a fully loaded trailer, total 78,500 lb. It is 28°F and the tractor sat outside overnight.
651 words, about 3 min2Blind-Side Dock Backing at 2 a.m.
At 2:15 a.m., a driver arrives at a grocery dock in a downtown alley. The dock is on the left side of the alley, about 150 feet from the street.
561 words, about 3 min3Brake Fade on a 6 Percent Night Descent
A driver is descending a 6 percent grade that runs 4 miles. Gross weight is 79,000 lb.
556 words, about 3 min4Stuck Gate at a Rural Railroad Crossing
A driver hauling a 53-foot dry van approaches a rural crossing at 10:40 p.m. The crossing has flashing red lights, a bell, and gates.
497 words, about 2 min5Steel Coil Shift at the Scale
A driver is hauling a flatbed load of six steel coils, each 4 feet wide and 5,000 lb, arranged in two rows of three, secured with chains and binders. After 90 miles, the driver pulls into a scale.
483 words, about 2 min