A70 QUESTIONS
Class A Knowledge
PennDOT’s complete Class A knowledge-test length: general and combination-vehicle topics.
70 items ~90 min
Independent CDL & ELDT Information PortalOfficial FMCSA Registry ↗
STATE-AWARE CDL PRACTICE
Practice the test.
Know the standard.
Choose your licensing state first, then take a full-length practice test with the same number of questions used in the selected exam profile. Pennsylvania is ready by default.
80% target score Immediate explanations Randomized versions
STEP 1 OF 2
Where will you test?
Pennsylvania
PennDOT question counts are verified against the official CDL FAQ.
STEP 2 OF 2
Choose a full-length test
Each session records your answers, explains every item, and calculates your score against the 80% practice target.
B50 QUESTIONS
Class B / C Knowledge
PennDOT’s core knowledge-test length for Class B and Class C applicants.
50 items ~65 min
L/Z25 QUESTIONS
Air Brakes
Air systems, inspections, pressure warnings, spring brakes and safe braking.
25 items ~30 min
P20 QUESTIONS
Passenger
Passenger safety, loading, railroad crossings, emergencies and bus inspections.
20 items ~25 min
S25 QUESTIONS
School Bus
Danger zones, student stops, mirror use, railroad crossings and evacuation.
25 items ~30 min
H30 QUESTIONS
Hazardous Materials
Shipping papers, placards, safe loading, security and emergency response.
30 items ~35 min
N20 QUESTIONS
Tank Vehicles
Liquid surge, outage, rollover prevention, valves and tank inspection.
20 items ~25 min
T20 QUESTIONS
Doubles / Triples
Converter dollies, coupling, rearward amplification and multiple-trailer control.
20 items ~25 min
EXAM-DAY RHYTHM
Built for focused practice.
- 01Answer onceChoose the best answer before seeing feedback.
- 02Learn immediatelyRead a concise explanation for every item.
- 03Reach 80%Finish the full official-length session and review.
Practice here. Verify there.
These are independent study tools—not live PennDOT or DMV exam questions. Test length for the Pennsylvania profile follows PennDOT’s published CDL test table. Study topics are based on the official Pennsylvania Commercial Driver’s Manual and the national CDL curriculum.