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400 General Knowledge practice questions — free, no signup. Aligned with FMCSA §383.111 standards.

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400
QUESTIONS
FREE
NO SIGNUP
2026
UPDATED
· 01 · ENDORSEMENT MODULES

Study by module.

Start with General Knowledge — the foundation every CDL candidate needs. More endorsements available in the App.

ENDORSEMENT · GK STUDY KIT

General Knowledge

400
QUESTIONS
35%
WEIGHT
Open module FORM CDL-GK
ENDORSEMENT · HM STUDY KIT

HazMat (H)

200+
QUESTIONS
All Classes
WEIGHT
Open module FORM CDL-HM
ENDORSEMENT · AB STUDY KIT

Air Brakes

150+
QUESTIONS
Class A·B
WEIGHT
Open module FORM CDL-AB
ENDORSEMENT · CV STUDY KIT

Combination Vehicles

150+
QUESTIONS
Class A
WEIGHT
Open module FORM CDL-CV
ENDORSEMENT · TK STUDY KIT

Tanker (N)

100+
QUESTIONS
All Classes
WEIGHT
Open module FORM CDL-TK
ENDORSEMENT · DT STUDY KIT

Doubles/Triples (T)

100+
QUESTIONS
Class A
WEIGHT
Open module FORM CDL-DT
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  • — HazMat, Air Brakes, Combination, Tanker, Doubles/Triples
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