Pennsylvania General Knowledge CDL Practice Test
Below are 25 exam-style questions for the Pennsylvania General Knowledge CDL knowledge test, modeled on the FMCSA-aligned content used by the Pennsylvania Department of Transportation. Try to answer each question on your own before reading the answer key directly under it. The questions and answer choices are shuffled deterministically per state and endorsement, so the order will stay the same on repeat visits — that lets you genuinely measure your improvement.
- A Shift into reverse
- B Look for an escape ramp
- C Coast in neutral
- D Use the parking brake hard
- A On wet roads only
- B To save fuel
- C On vehicles without ABS, to keep them straight in an emergency
- D On vehicles with ABS
- A Any vehicle over 26,001 lbs
- B Vehicles designed to carry 16+ passengers including the driver, or that require hazmat placards
- C Class A combinations only
- D Tractor-trailers under 26,001 lbs GCWR
- A Release the brake, let the wheels turn freely, and let the vehicle slow down
- B Accelerate
- C Brake hard immediately
- D Steer sharply in the opposite direction
- A All of the above
- B It would make you exceed federal hours-of-service rules
- C The cargo is not properly secured or placarded
- D It would push your weight over legal limits
- A Safety for yourself and other road users
- B To improve fuel economy
- C To meet your dispatcher's schedule
- D To reduce tire wear
- A Use low-beam headlights and slow down
- B Drive faster to get out of the fog quickly
- C Use high-beam headlights for maximum visibility
- D Use the four-ways while in motion at highway speed
- A Driving too fast for conditions
- B Properly working brakes
- C Old tires
- D Manual transmissions
- A Checking the engine compartment
- B Adjusting the trailer brakes individually
- C Walking around the vehicle and checking lights
- D Testing the service and parking brakes
- A To save fuel and improve mileage
- B So the brake lights don't mislead following drivers and so the brakes don't overheat
- C To rest the right leg
- D To save brake pads and reduce drag
- A Brake suddenly to teach a lesson
- B Speed up to get away
- C Move to the left lane only
- D Increase your following distance from the vehicle in front to give both of you more room
- A Speed times weight
- B Perception distance + reaction distance + brake-lag distance + braking distance
- C Brake-lag distance only
- D Reaction distance only
- A Test the low-air warning then drive
- B Test the service brake then the parking brake
- C Test the parking brake then the service brake
- D Test only the air-leak rate
- A It cools the brakes too much
- B Brake fade can leave you with reduced or no braking power
- C It triggers the ABS warning light
- D It wastes brake pads
- A In residential areas only because of noise
- B On any downgrade
- C Driving in dry conditions
- D Roads are wet, icy, or snow-covered
- A A red flag (or red light at night) at the extreme rear
- B A green flag
- C Nothing — federal rules do not require marking
- D Yellow tape only
- A 11 hours
- B 10 hours
- C 14 hours
- D 16 hours
- A Signal only at the moment you start turning
- B Use the four-way flashers instead of signals at intersections
- C Signal only when other vehicles are present
- D Signal early, signal continuously, and cancel after the turn
- A Looks neat from the outside
- B Cannot shift on stops, starts, or turns and is within axle weight limits
- C Fills the trailer floor edge to edge
- D Is loaded in the order it will be delivered
- A Bridge surfaces freeze first because of air circulation underneath
- B Bridges are inspected only in winter
- C The pavement under the bridge is reinforced
- D The bridge is closed in winter
- A A federal speed restriction
- B The area immediately next to it where other drivers are hidden in your blind spots
- C The fuel tank area
- D The area in front of the steer axle
- A 4 seconds
- B 1 second
- C 6 seconds
- D 10 seconds
- A Took the test and failed
- B Took the test and passed
- C Need to take it again later
- D Did not take the test, with no consequence
- A Coasting in neutral
- B Locking the wheels
- C Applying the brakes as hard as possible without locking the wheels
- D Pumping the brakes hard and fast
- A When you are stopped or moving slowly enough to be a hazard
- B Only at night
- C Whenever you feel like it
- D Only on the highway
Study tips for the Pennsylvania General Knowledge exam
The General Knowledge portion of the Pennsylvania CDL exam is graded out of the bank of questions the Pennsylvania Department of Transportation draws from each year. While the exact bank is not published, every question is sourced from the General Knowledge chapter of the Pennsylvania CDL handbook, which itself is derived from the FMCSA Model Commercial Driver's License Manual. That means studying our practice tests, reading the corresponding handbook chapter, and re-reading the parts you got wrong is genuinely the most efficient route to a first-time pass.
Most successful applicants follow a simple cycle: take the practice test cold, write down every question you missed, open the matching chapter of the official Pennsylvania handbook, re-read the section that contains the right answer, then re-take the practice test 24 to 48 hours later. The 24-hour delay matters — sleep is when your brain commits new information to long-term memory, and CDL knowledge questions reward that kind of consolidated learning rather than cramming.
Pay particular attention to questions that include qualifier words like always, never, only, primary, or most. CDL test writers love to flip the right answer with a single qualifier. When two answer choices look almost identical, pay attention to the verb (is it must, should, or may?) and to any numbers (14 days, 100 air miles, 8 hours, 70/8 split). On endorsement tests in particular, watch for trick framing where a true statement about a different endorsement is offered as the "correct" answer to a question that is actually about General Knowledge.
Test-day logistics matter too. Bring photo ID, your Social Security card or birth certificate, your medical examiner's certificate (DOT card), and proof of state residency if you haven't already submitted those documents. The Pennsylvania Department of Transportation will not let you sit for the knowledge exam without your documentation, and most offices charge an additional fee for re-attempts. Arrive early — the wait at most CDL testing offices runs 30 to 60 minutes — and silence your phone before the exam begins.
Finally, keep your General Knowledge fundamentals sharp even when you're focused on the General Knowledge exam. Many states administer multiple knowledge tests in a single sitting, and questions on weight definitions (GVWR, GCWR, GAWR), stopping distance, and the pre-trip inspection routine show up across endorsements. If you're unsure on the basics, sit a fresh Pennsylvania General Knowledge practice test before scheduling the real exam.
Next steps
Missed more than four questions? Re-read the General Knowledge study guide and the matching chapter in the official Pennsylvania CDL handbook. Then come back and re-take the test. Once you can score 22 of 25 or higher on three runs in a row, you're in good shape to schedule the real exam at your local Pennsylvania Department of Transportation office.
Already comfortable with this endorsement? Drill another: PA Air Brakes · PA Combination Vehicles · PA Hazardous Materials · PA Passenger · PA School Bus · PA Tank Vehicle · PA Doubles / Triples
New to the CDL process in Pennsylvania? Read How to apply for a CDL in Pennsylvania for the document checklist and step-by-step timeline.