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Free Pennsylvania CDL practice test online

Take a free Pennsylvania CDL practice exam online with clear explanations—no sign-up. Coverage includes general knowledge, vehicle systems, combination vehicles, cargo, and endorsements. Then verify current requirements with Pennsylvania Department of Transportation.

CDL knowledge tests are federally regulated, so the passing score in Pennsylvania is the same as everywhere else: 80% correct on every knowledge test. You must also hold a commercial learner’s permit for 15 days before the skills test.

Start practice Exam-style run

New to the knowledge test? CDL endorsements explained · One-week study plan

Practice coverage
Complete a run to establish your baseline.
600questions
23topics
80%federal pass mark

49 CFR 383.135(a)(1) sets the CDL knowledge-test passing score at 80%. Reaching it here is not a prediction of your official result.

Requirements before you test

Pennsylvania CDL test requirements

80%
Passing score
49 CFR 383.135(a)(1)
15 days
CLP held before skills test
Pennsylvania Department of Transportation
18
Min. age (in-state)
Pennsylvania Department of Transportation
21
Min. age (interstate)
49 CFR 391.11(b)(1)

Commercial licensing is largely federal. Any figure above credited to a 49 CFR section applies in every state — see 49 CFR 383.135(a)(1) and 49 CFR 383.25(e). A figure credited to Pennsylvania Department of Transportation is Pennsylvania’s own, and may be stricter than the federal floor. Test length, fees, and scheduling are set by Pennsylvania Department of Transportation (official source).

Entry-Level Driver Training comes first

Since February 7, 2022, a new Class A or Class B CDL, a class upgrade, or a first passenger, school bus, or hazardous materials endorsement requires training from a provider on the FMCSA Training Provider Registry (49 CFR 380.600). Practice questions are study material and do not satisfy that requirement.

FMCSA Training Provider Registry

You need a Pennsylvania licence first

A commercial learner’s permit only counts if you already hold an ordinary licence from the same state (49 CFR 383.25(a)(2)). The Pennsylvania non-commercial knowledge test runs 18 questions and needs 15 correct, with permits issued from age 16.

Pennsylvania permit practice test
Quick practice
10 balanced questions with feedback after every answer.
Practice now
Topic review
Focus on one knowledge area before returning to mixed practice.
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Exam-style run
Answer the full starter bank before seeing your results.
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What you will practice

Build coverage topic by topic.

Each question carries a topic, difficulty, explanation, and source section so your review has context.

General knowledge29 reviewed questionsMountain driving12 reviewed questionsAir brakes61 reviewed questionsCombination vehicles54 reviewed questionsVehicle systems9 reviewed questionsCargo18 reviewed questionsTank vehicles47 reviewed questionsDoubles and triples43 reviewed questionsHazardous materials71 reviewed questionsSchool bus48 reviewed questionsPassenger vehicles45 reviewed questionsSafe driving6 reviewed questionsSpace management14 reviewed questionsVehicle inspection15 reviewed questionsEmergencies23 reviewed questionsHours of service14 reviewed questionsBasic control11 reviewed questionsSeeing hazards15 reviewed questionsWeather18 reviewed questionsNight driving7 reviewed questionsDriver fitness8 reviewed questionsSpeed management17 reviewed questionsCommunication15 reviewed questions

Sample questions

5 Pennsylvania CDL practice questions

Try these Pennsylvania sample questions now — each shows the correct answer with a plain-language explanation and a source section. The full 600-question bank is in the practice run.

  1. 1. After ordering an evacuation, the driver should:

    • AOnly count from the driver’s seat
    • BSend all students across the road alone
    • CLeave immediately without checking seats
    • Walk through the bus to ensure no students remain, retrieve emergency equipment, then account for everyone

    Answer: Walk through the bus to ensure no students remain, retrieve emergency equipment, then account for everyone. Protect the scene with warning devices as needed and prepare information for responders.

    Source: Commercial Driver License Manual — School buses — evacuation procedures

  2. 2. Because of surge and high center of gravity, tank drivers must:

    • Start, slow, stop, and turn very smoothly
    • BUse only stab braking for every stop
    • CIgnore posted ramp speeds
    • DStart, slow, and stop as abruptly as possible

    Answer: Start, slow, stop, and turn very smoothly. Smooth control limits surge. Keep steady brake pressure and do not release too soon when stopping.

    Source: Commercial Driver License Manual — Tank vehicles — drive smoothly

  3. 3. The standee line on a bus marks:

    • AThe emergency exit only
    • BThe fare box queue
    • CWhere baggage may be stacked
    • Where standing riders must stay behind (no standing forward of the rear of the driver’s seat)

    Answer: Where standing riders must stay behind (no standing forward of the rear of the driver’s seat). Buses that allow standing use a floor line or equivalent so riders do not block the driver.

    Source: Commercial Driver License Manual — Passenger vehicles — standee line

  4. 4. In bad weather or on mountains, doubles and triples need extra caution because:

    • AThey cannot use engine brakes
    • BTire rules do not apply
    • CThey are shorter than other CMVs
    • They have greater length and more dead axles to pull, raising skid and traction risk

    Answer: They have greater length and more dead axles to pull, raising skid and traction risk. More axles and length mean more chance for skids and loss of traction when conditions are poor.

    Source: Commercial Driver License Manual — Doubles and triples — adverse conditions

  5. 5. In dual air systems at operating RPM, pressure should typically build from 85 to 100 psi within:

    • A15 seconds
    • 45 seconds
    • C3 minutes
    • D10 minutes

    Answer: 45 seconds. If buildup is too slow, pressure may fall dangerously while driving. Check manufacturer specs for larger tanks.

    Source: Commercial Driver License Manual — Air brakes — pressure buildup

Practice all 600 questions

CDL knowledge areas

Classes and endorsements, organized.

Each area below scopes the reviewed question bank to one knowledge test. The material is federal, so it applies in Pennsylvania just like everywhere else — the endorsement guide explains how the codes fit together.

General knowledge

The foundation for commercial driving: inspections, space, speed, communication, hazards, and safe operation.

  • Pre-trip inspection
  • Space and speed management
  • Railroad crossings
  • Emergency procedures
Practice general knowledge
Air brakes

Understand air-brake components, inspections, warning devices, stopping distance, and controlled braking.

  • Dual air systems
  • Low-air warnings
  • Brake lag and fade
  • Applied-leak and static checks
Practice air brakes
Combination vehicles

Prepare for safe coupling, inspection, turning, backing, and handling of tractor-trailer combinations.

  • Fifth-wheel inspection
  • Coupling and uncoupling
  • Off-tracking
  • Trailer skid prevention
Practice combination vehicles
Hazardous materialsEndorsement H

Study hazard communication, shipping papers, placards, loading rules, parking, and emergency response responsibilities.

  • Hazard classes
  • Placards and labels
  • Shipping papers
  • Loading and segregation
Practice hazardous materials
Tank vehiclesEndorsement N

Learn how liquid surge, outage, bulkheads, and high centers of gravity change vehicle handling.

  • Liquid surge
  • Outage requirements
  • Smooth braking
  • Rollover prevention
Practice tank vehicles
Doubles & triplesEndorsement T

Practice converter-dolly inspection, coupling order, rearward amplification, and stability principles.

  • Coupling sequence
  • Converter dollies
  • Rearward amplification
  • Space management
Practice doubles & triples
Passenger vehiclesEndorsement P

Prepare to inspect, load, and operate buses while keeping passengers, aisles, and exits safe.

  • Vehicle inspection
  • Passenger loading
  • Emergency exits
  • Prohibited practices
Practice passenger vehicles
School busEndorsement S

Review student loading, danger zones, mirrors, emergency procedures, and special railroad-crossing duties.

  • Danger zones
  • Student loading
  • Mirror use
  • Railroad crossings
Practice school bus
Official source hub
Verify current rules before your test.

QuizLane’s starter material points learners back to the agency responsible for licensing in Pennsylvania. Rules and manuals can change; the official agency remains authoritative.

Visit Pennsylvania Department of Transportation
Our accuracy promise
Original wording—not scraped competitor questions
A source section attached to every reviewed item
A correction path when something looks wrong
Read our methodology

More northeast practice

Nearby CDL practice tests

Jump to another northeast state hub, or browse every jurisdiction.

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Common questions

What this practice can—and cannot—tell you.