Iowa General Knowledge Practice Test 4
50 questions covering general knowledge content, drawn from the FMCSA-aligned CDL question pool and the Iowa Commercial Driver's License Manual.
What this test covers
The General Knowledge test has 50 multiple-choice questions in most states (some states use a slightly different question count). You need an 80% score to pass. Topics include safe driving practices, transporting cargo safely, vehicle inspection procedures, communication with other drivers, speed and space management, hazard awareness, distracted-driving rules, fatigue and hours of service basics, accident procedures, and the consequences of alcohol and controlled substance use. The test draws from the General Knowledge section of your state's CDL manual.
Sample General Knowledge questions
Preview of what is on Practice Test 4. Unlock with Pro to take the full 50-question test.
What is the minimum age to obtain a CDL for intrastate commercial driving in Iowa?
At what age can an Iowa CDL holder operate a CMV across state lines (interstate)?
At what age can an Iowa resident obtain a Commercial Learner's Permit (CLP)?