CDL General Knowledge

Free practice tests, topic drills and exam strategy for the CDL General Knowledge credential, administered by FMCSA + state DMVs. Each topic below has dedicated practice variants with answer explanations.

50 questionsExam length

80%Passing standard

$10-$100 USD per stateExam fee

11Topic domains

Practice by topic domain

Click any topic to start a drill. Each topic has two practice variants — do them on different days for spaced repetition.

1

Vehicle Inspection

2 practice variants · 12 questions each · instant scoring

Variant 1 · Variant 2

2

Basic Vehicle Control

2 practice variants · 12 questions each · instant scoring

Variant 1 · Variant 2

3

Shifting Gears

2 practice variants · 12 questions each · instant scoring

Variant 1 · Variant 2

4

Backing Safely

2 practice variants · 12 questions each · instant scoring

Variant 1 · Variant 2

5

Communication & Signaling

2 practice variants · 12 questions each · instant scoring

Variant 1 · Variant 2

6

Space Management

2 practice variants · 12 questions each · instant scoring

Variant 1 · Variant 2

7

Speed Management

2 practice variants · 12 questions each · instant scoring

Variant 1 · Variant 2

8

Curves & Night Driving

2 practice variants · 12 questions each · instant scoring

Variant 1 · Variant 2

9

Fog & Mountain Driving

2 practice variants · 12 questions each · instant scoring

Variant 1 · Variant 2

10

Hazardous Cargo

2 practice variants · 12 questions each · instant scoring

Variant 1 · Variant 2

11

Accident Procedures

2 practice variants · 12 questions each · instant scoring

Variant 1 · Variant 2

About the CDL General

The CDL General Knowledge is administered by FMCSA + state DMVs and runs 50 questions, with a passing score of 80%. The current exam fee is $10-$100 USD per state. The official candidate handbook and registration is available from the FMCSA + state DMVs directly: view the official exam page →

This credential is part of the Skilled Trades & Transportation career field. Skilled-trade and transportation licensing exams cover commercial driving (CDL by the FMCSA and state DMVs), HVAC refrigerant handling (EPA Section 608, NATE), electrical journeyman/master licensure, plumbing, welding (AWS) and OSHA construction-safety credentialing. Each is administered by a federal agency or trade body with a state-issued license layered on top.

State-specific practice tracks

This is a state-licensed credential. Pick your state below for a state-specific practice variant including local statutes and the appropriate state board\'s candidate handbook references.