Free practice questions, official PA DMV fees (from $21.5), testing-office list, and state-specific rules — all cited to primary sources.
Last reviewed 2026-04-26 · cdltest.com Editorial Team
Pennsylvania sits at the pinch point of the Northeast freight corridor. The Pennsylvania Turnpike, I-78, I-81, and I-80 carry a disproportionate share of the country's east-west commercial traffic, and the Port of Philadelphia and the steel, petroleum, and petrochemical corridors in the west feed a steady stream of Tank (N) and Hazmat (H) demand. The Pennsylvania Department of Transportation, through its Driver and Vehicle Services division, administers the CDL program using PUB 223, a Commercial Driver's Manual that PennDOT publishes in 32 languages. If you are testing in Pennsylvania, a few specific rules diverge from the generic FMCSA template, and those are the places where out-of-state applicants most often get tripped up.
The license pathway itself follows the federal pattern. You apply for a Class A, B, or commercial Class C, receive a Commercial Learner's Permit along with a Knowledge Test Authorization, and then pass three exams: the knowledge test, the pre-trip Vehicle Inspection, and the Basic Control Skills plus Road Test. What is not federal is the holding period. Pennsylvania requires 15 days between CLP issuance and the skills test, not the federal 14. If you calendar-math off a national prep site and try to book the skills test for the 14th day after your CLP, PennDOT will reject the appointment. Use 15 as the floor.
Pennsylvania also tracks the clock differently. When PennDOT approves your CLP application, it issues a Knowledge Test Authorization, or KTA, that is valid for one year. Inside that year you get three attempts per knowledge test. If the year runs out before you pass the skills test, you reapply from the beginning and a fresh KTA is issued, and any knowledge-test results older than 12 months have to be retaken. Most states anchor the timeline to the CLP itself, so the KTA framing catches out-of-state applicants who assume they have unlimited retakes.
Knowledge tests are administered in ten languages: English, Spanish, Arabic, Chinese (Mandarin), French, Hindi, Korean, Russian, Ukrainian, and Vietnamese. The manual covers 32 languages, which is broader than the test interface. The Hazmat endorsement knowledge test is English-only by federal and state law. Translators are not permitted during testing without prior authorization from the PennDOT Customer Call Center at 1-800-932-4600.
Military applicants have a direct path. Pennsylvania's waiver is authorized by Act 133 of 2008 and Act 131 of 2020, on top of the federal 49 CFR 383.77 baseline. Active-duty, reserve, and recently discharged veterans with at least two years of military CMV-equivalent driving experience can file form DL-398 alongside DL-31CD and DL-11CD to waive the skills test, and in some categories the knowledge tests as well. The waiver is targeted at classes and endorsements similar to the military vehicles the applicant operated; school bus and doubles/triples endorsements are handled separately.
Pennsylvania splits CDL services across two types of PennDOT offices. The downtown Driver License Centers (Harrisburg Riverfront, Pittsburgh Smithfield Street, Philadelphia Columbus and Arch) handle CDL knowledge testing and CDL transactions, with knowledge testing stopping at 2 p.m. The modernized three-part skills test, live statewide since 2023-08-28, is run at suburban PennDOT sites (Summerdale, Dunmore, Erie, Wilkes-Barre) and at PennDOT-approved third-party CDL testers (Penn Commercial in Washington and others across the state). Third-party testers set their own market-rate fees and often have earlier appointment availability than PennDOT in the Philadelphia and Pittsburgh metros.
We review this page against PUB 223 and the PennDOT Payments and Fees schedule. The last review date is shown at the bottom of the page, next to the full source list.
Pennsylvania requires a 15-day CLP holding period — one day longer than the federal minimum
PennDOT's Commercial Driver License Learner's Permit FAQ states: "A minimum waiting period of 15 days is required from the date the permit is issued until the scheduled date of your class A, B, or C skills test." The federal minimum is 14 days. Applicants who calendar-math off the federal rule and try to book the skills test on day 14 will be turned away.
Knowledge Test Authorization (KTA) is valid one year with three attempts per knowledge test
PennDOT issues a Knowledge Test Authorization when the CLP application is approved. Applicants have one year from the KTA issue date to pass all knowledge and skills tests and get three attempts at each knowledge test per KTA. If the year expires without a skills test pass, the applicant must reapply for the CLP and receive a fresh KTA, and knowledge-test results older than one year must be retaken.
CDL knowledge tests are offered in ten languages; Hazmat endorsement is English-only
Since 2013-07-22, PennDOT has administered driver knowledge tests in English, Spanish, Arabic, Chinese (Mandarin), French, Hindi, Korean, Russian, Ukrainian, and Vietnamese. The Hazmat endorsement knowledge test remains English-only by state and federal law. Translators are not permitted during testing without prior authorization from PennDOT's Customer Call Center. PUB 223 itself is published in 32 languages, but the on-screen CDL knowledge test is narrower.
Military CDL Skills Test Waiver (DL-398) is authorized by PA Act 133 of 2008 and Act 131 of 2020
Pennsylvania residents who are active duty, reserve, or recently honorably discharged veterans with at least two years of experience operating a CMV-equivalent vehicle as part of their military duties can waive the skills test, and in some cases the knowledge tests, by filing form DL-398 alongside DL-31CD and DL-11CD. Two Pennsylvania statutes authorize this program (Act 133 of 2008 and Act 131 of 2020) in addition to the federal 49 CFR 383.77 baseline.
Modernized three-part CDL skills test has been live statewide since 2023-08-28
Every PennDOT Driver License Center offering CDL tests and every approved third-party CDL tester administers the modernized three-part skills test: Vehicle Inspection (up to 90 components, with the applicant's checklist allowed as a memory aid), Basic Control Skills (four maneuvers — forward stop, straight-line backing, forward offset tracking, reverse offset backing), and the on-road Road Test. PennDOT also adopted the FMCSA federal waiver that lets school bus (S endorsement) applicants skip the under-the-hood engine component inspection through 2026-11-28.
PennDOT issues all four federal self-certification categories (NI, NA, EI, EA) on form DL-11CD
Every CDL holder and every CLP applicant must submit a DL-11CD Self-Certification selecting Non-Excepted Interstate (NI, federal medical, nationwide), Non-Excepted Intrastate (NA, state-only, federal medical), Excepted Interstate (EI, no medical certificate required), or Excepted Intrastate (EA, no medical certificate required). As of 2025-06-23, PennDOT accepts Medical Examiner's Certificates electronically only from the FMCSA National Registry — paper MEC submissions have been phased out.
Pennsylvania farm truck and farm-truck combination CDL exemption
PA Vehicle Code exempts drivers of a Pennsylvania farm truck or farm-truck-powered combination operated intrastate from CDL requirements regardless of distance when the vehicle qualifies under PA farm-vehicle Type A, B, C, or D. Type A covers vehicles at or below 10,000 lbs GVWR with a 50-mile operating radius; Type B covers 10,001-17,000 lbs with a 25-mile radius; Types C and D cover vehicles above 17,000 lbs with a 10-mile radius (Type C is daytime-only, Type D is 24-hour). For interstate operation, the federal 150-air-mile farm-radius restriction applies. These are vehicle-class exemptions, not blanket farm-worker exemptions.
15 questions from the FMCSA CDL Manual. Click to reveal each answer.
What is the most important reason to inspect your vehicle before a trip?
A. To satisfy your dispatcher that the vehicle has been checked in
B. Safety, for yourself and for other road users
C. To make the vehicle look clean before delivery
D. To qualify for a fuel-economy bonus
Correct: B. Safety, for yourself and for other road users
The manual states plainly that safety — both yours and that of other road users — is the most important reason you inspect your vehicle. A defect caught at inspection can prevent a breakdown or a crash on the road.
Source: FMCSA CDL Manual, Section 2.1.1
Why does the manual recommend doing the seven-step pre-trip inspection the same way every time?
A. Federal law requires the exact sequence to be followed
B. The DMV examiner grades you on the order alone
C. You will learn all the steps and be less likely to forget something
D. Different sequences wear out different vehicle parts
Correct: C. You will learn all the steps and be less likely to forget something
The seven-step method works because consistency builds memory. The manual says to do the pre-trip the same way each time so you will learn all the steps and be less likely to forget something.
Source: FMCSA CDL Manual, Section 2.1.5
While driving, which of the following is NOT one of the manual’s recommended ways to watch for vehicle problems during a trip?
A. Watch your gauges for signs of trouble
B. Use your senses to check for problems — look, listen, smell, feel
C. Check critical items when you stop, such as tires, brakes, and lights
D. Rely on the engine-control-module logs to surface any problems after the trip
Correct: D. Rely on the engine-control-module logs to surface any problems after the trip
The manual’s during-trip checks are all active and in-the-moment: watch gauges, use your senses, and inspect critical items at stops. Waiting until after the trip to review ECM logs misses the point — the during-trip inspection exists precisely so you catch problems before they turn into crashes.
Source: FMCSA CDL Manual, Section 2.1.2
When you must back a commercial vehicle, the manual says you should back toward the driver’s side. Why?
A. Backing toward the driver’s side is required by federal regulation
B. So you can see the rear of your vehicle by looking out the side window
C. So the exhaust stack will blow away from pedestrians
D. So the trailer brakes receive more air pressure
Correct: B. So you can see the rear of your vehicle by looking out the side window
Backing to the driver’s side lets you see the rear of your vehicle directly out the side window, which the manual presents as far safer than relying only on a blind-side mirror.
Source: FMCSA CDL Manual, Section 2.2
According to the manual, when should you downshift before entering a curve?
A. While you are in the curve, at the apex
B. After the curve, as you accelerate out
C. Before entering the curve, after slowing to a safe speed
D. Only if the curve is posted below 25 mph
Correct: C. Before entering the curve, after slowing to a safe speed
The manual says to slow to a safe speed and downshift to the right gear before entering the curve. Being in the right gear before the curve lets you apply some power through the turn, which keeps the vehicle more stable.
Source: FMCSA CDL Manual, Section 2.3.1
Which three components add up to total stopping distance for a commercial vehicle with hydraulic brakes?
A. Perception distance, reaction distance, and braking distance
B. Following distance, reaction distance, and braking distance
C. Perception distance, braking distance, and skid distance
D. Reaction distance, braking distance, and off-tracking distance
Correct: A. Perception distance, reaction distance, and braking distance
The manual gives the formula Perception Distance + Reaction Distance + Braking Distance = Total Stopping Distance. At 55 mph those add up to roughly 419 feet under ideal conditions.
Source: FMCSA CDL Manual, Section 2.6.1
You are driving a 40-foot vehicle at 35 mph. Under the manual’s following-distance rule, how much space should you keep between you and the vehicle ahead?
A. At least 2 seconds
B. At least 4 seconds
C. At least 5 seconds
D. At least 7 seconds
Correct: B. At least 4 seconds
The rule is one second per 10 feet of vehicle length at speeds below 40 mph. A 40-foot vehicle needs at least 4 seconds. You would add 1 second for speeds above 40 mph, which does not apply here.
Source: FMCSA CDL Manual, Section 2.7.1
At night, how does the manual say you should match your speed to your headlights?
A. Drive fast enough that your headlights stay on the brightest setting
B. Drive at whatever speed the traffic around you is driving
C. Adjust your speed so you can stop within the range your headlights illuminate
D. Drive at the posted speed limit regardless of how far your lights reach
Correct: C. Adjust your speed so you can stop within the range your headlights illuminate
The manual says you must adjust your speed to keep your stopping distance within your sight distance — in other words, slow enough to stop within the range of your headlights (about 250 feet on low beams, 350–500 feet on high).
Source: FMCSA CDL Manual, Section 2.11.4
How far ahead does the manual say good drivers of large commercial vehicles typically look?
A. 2 to 4 seconds ahead
B. 6 to 8 seconds ahead
C. 12 to 15 seconds ahead
D. 30 to 45 seconds ahead
Correct: C. 12 to 15 seconds ahead
Most good drivers look at least 12 to 15 seconds ahead — about one block at city speeds and about a quarter of a mile at highway speeds. Looking that far ahead lets you change speed or lanes smoothly instead of reacting suddenly.
Source: FMCSA CDL Manual, Section 2.4.1
You don’t have enough room to stop before hitting an obstacle in your lane. What does the manual say about steering around it?
A. Stopping is always safer than steering, even when space is short
B. You can almost always turn to miss an obstacle more quickly than you can stop
C. You should apply the brakes hard while turning to scrub off speed
D. You should lock the brakes fully and let the vehicle skid to a stop rather than turning
Correct: B. You can almost always turn to miss an obstacle more quickly than you can stop
The manual explicitly says you can almost always turn to miss an obstacle more quickly than you can stop. Stopping is not always the safest response when space is short — but top-heavy vehicles and multi-trailer combinations may flip if turned too sharply.
Source: FMCSA CDL Manual, Section 2.17.1
Your rear drive wheels begin a braking skid. What is the first action the manual tells you to take?
A. Press harder on the brake pedal to slow the vehicle faster
B. Stop braking, so the rear wheels can roll again and regain traction
C. Pull the parking brake to lock the rear wheels and stop the slide
D. Shift into neutral and coast until the skid ends
Correct: B. Stop braking, so the rear wheels can roll again and regain traction
The manual’s first step to correct a drive-wheel braking skid is to stop braking. Locked wheels have less traction than rolling wheels, so releasing the brakes lets the rear wheels roll and keeps them from sliding further sideways.
Source: FMCSA CDL Manual, Section 2.19.2
Even when you did not load the cargo yourself, you are still responsible for all of the following EXCEPT:
A. Inspecting your cargo
B. Recognizing overloads and poorly balanced weight
C. Knowing the cargo is properly secured and does not block your view
D. Determining the final retail price of the cargo
Correct: D. Determining the final retail price of the cargo
The manual lists the driver’s cargo responsibilities as inspecting cargo, recognizing overloads and bad weight distribution, confirming secure loading with unobstructed view, and keeping access to emergency equipment clear. Retail pricing is not a driver duty.
Source: FMCSA CDL Manual, Section 3.1
Under the federal rule repeated in the manual, what is the minimum number of tiedowns for a piece of flatbed cargo, no matter how small?
A. One tiedown
B. Two tiedowns
C. Three tiedowns
D. Four tiedowns
Correct: B. Two tiedowns
The manual requires at least one tiedown for every 10 feet of cargo, and specifies that no matter how small the piece of cargo is, it must have at least two tiedowns.
Source: FMCSA CDL Manual, Section 3.3.2
Compared with the hydraulic brakes on a car, what extra factor adds to stopping distance when a vehicle has air brakes?
A. Perception distance is longer because the driver sits higher
B. Reaction distance is longer because of the heavier steering wheel
C. Brake lag — the time (about half a second) it takes for air to flow through the lines to the brakes
D. Air brakes shorten stopping distance, they do not add to it
Correct: C. Brake lag — the time (about half a second) it takes for air to flow through the lines to the brakes
With hydraulic brakes the brakes work instantly, but with air brakes it takes about a half second or more for the air to flow through the lines. This brake-lag distance is added to perception, reaction, and braking distance — at 55 mph it adds roughly 32 feet.
Source: FMCSA CDL Manual, Section 5.4.4
You are offered a load whose shipping papers require the vehicle to display hazardous materials placards. You do not have a HazMat endorsement on your CDL. What does the manual say?
A. You may drive the load if you keep the placards off until you reach the highway
B. You may drive the load as long as another endorsed driver rides along
C. You may not drive a vehicle that requires placards unless your license has the hazardous materials endorsement
D. You may drive the load because the General Knowledge test already covers HazMat
Correct: C. You may not drive a vehicle that requires placards unless your license has the hazardous materials endorsement
The manual states that if a vehicle requires placards, you cannot drive it unless your license has the hazardous materials endorsement — doing so is a crime. All drivers should be able to recognize HazMat cargo, but driving a placarded vehicle requires the H endorsement.