Pennsylvania General Knowledge Test
You'll face 50 questions that cover everything from pre-trip inspections to handling the Pennsylvania Turnpike's steep grades and winter ice.
Select Test Mode
This practice test mirrors the real Pennsylvania CDL General Knowledge exam. 50 questions, 80% to pass — no fluff, just what you need.
Key Topics
- •Pre-trip inspection
- •Air brakes
- •Safe driving
About the Pennsylvania General Knowledge Test
Topics Covered
- ✓Vehicle inspection procedures — Pennsylvania examiners expect you to know the full pre-trip routine, especially checking brakes and lights before hauling coal or timber out of the mountains.
- ✓Air brakes — With all the steep downgrades on the Turnpike and I-81, air brake theory isn't optional. Expect questions on brake lag, low-pressure warnings, and stopping distances in the rain.
- ✓Safe driving practices — Pennsylvania's mix of interstates, rural roads, and congested suburbs means you need to know following distances, mirror use, and how to handle aggressive drivers.
- + 3 more topics
📘 Study Tips & State Info
Start with the Pennsylvania CDL Manual. Read it cover to cover, but don't just memorize — think about how each rule applies to actual PA roads. When the manual talks about controlling speed on downgrades, picture yourself coming down the east slope of the Alleghenies on I-76. When it covers winter driving, imagine the black ice on I-80 near Williamsport.
PennDOT examiners love questions about brake systems. You'll see at least a dozen air brake questions on the General Knowledge test. Focus on the difference between service brakes and parking brakes, what happens when air pressure drops below 60 psi, and how to test the low-pressure warning device. The manual spells it out — but you need to know it cold.
Take practice tests until you're consistently scoring 85% or higher. The real test uses the same question format, so getting comfortable with how they phrase things helps. And don't skip the pre-trip inspection section — it's a big chunk of the test, and it's easy points if you study the checklist.
PennDOT handles all CDL testing in Pennsylvania. You'll find test centers at major Driver License Centers in Harrisburg, Philadelphia, Pittsburgh, Scranton, Erie, and many other locations. Appointments are strongly recommended — walk-ins are accepted at some centers but you might wait hours. You can schedule online through the PennDOT Driver and Vehicle Services website.
To take the General Knowledge test, you need to bring your valid Pennsylvania driver's license, your Medical Examiner's Certificate (DOT physical), and payment for the permit fee — currently $10 for the learner's permit application. The test itself is included in that fee. If you fail, you can retake it the next business day at the same location, but you'll pay a $10 retest fee each time.
One thing that catches people: Pennsylvania requires you to pass a vision screening before you take the written test. If you wear glasses or contacts, don't forget them. And if you have a medical condition that might affect your driving, have your paperwork ready.
About the Pennsylvania General Knowledge Test
The Pennsylvania CDL General Knowledge test is your first hurdle to getting a commercial driver's license. It covers the basic rules all CDL holders need to know — whether you're driving a dump truck on I-81 or hauling livestock through Amish country. You'll answer 50 multiple-choice questions, and you need at least 40 right to pass.
Pennsylvania isn't flat. You'll deal with the steep grades of I-76 east of Bedford, the winding two-lanes in the Poconos, and the lake-effect snow that can dump a foot on I-90 near Erie in a few hours. The test reflects that reality. It asks about safe speeds on downgrades, proper use of engine brakes, and how to handle emergencies when the weather turns nasty.
PennDOT administers the test at driver license centers across the state. You'll take it on a computer, and the questions come straight from the Pennsylvania CDL Manual. There's no trick — just know the material, and you'll pass.
Topics Covered
Study Tips
Start with the Pennsylvania CDL Manual. Read it cover to cover, but don't just memorize — think about how each rule applies to actual PA roads. When the manual talks about controlling speed on downgrades, picture yourself coming down the east slope of the Alleghenies on I-76. When it covers winter driving, imagine the black ice on I-80 near Williamsport.
PennDOT examiners love questions about brake systems. You'll see at least a dozen air brake questions on the General Knowledge test. Focus on the difference between service brakes and parking brakes, what happens when air pressure drops below 60 psi, and how to test the low-pressure warning device. The manual spells it out — but you need to know it cold.
Take practice tests until you're consistently scoring 85% or higher. The real test uses the same question format, so getting comfortable with how they phrase things helps. And don't skip the pre-trip inspection section — it's a big chunk of the test, and it's easy points if you study the checklist.
Pennsylvania Specific Information
PennDOT handles all CDL testing in Pennsylvania. You'll find test centers at major Driver License Centers in Harrisburg, Philadelphia, Pittsburgh, Scranton, Erie, and many other locations. Appointments are strongly recommended — walk-ins are accepted at some centers but you might wait hours. You can schedule online through the PennDOT Driver and Vehicle Services website.
To take the General Knowledge test, you need to bring your valid Pennsylvania driver's license, your Medical Examiner's Certificate (DOT physical), and payment for the permit fee — currently $10 for the learner's permit application. The test itself is included in that fee. If you fail, you can retake it the next business day at the same location, but you'll pay a $10 retest fee each time.
One thing that catches people: Pennsylvania requires you to pass a vision screening before you take the written test. If you wear glasses or contacts, don't forget them. And if you have a medical condition that might affect your driving, have your paperwork ready.