The real Iowa knowledge test is the DMV exam used for a learner permit. This page contains one fixed 20 question slice of the full free 180 question bank, with an explanation after each answer.
Sample question from test 7
safe-driving
When passing a large truck, when should the passing driver move back into the original lane?
- After seeing the front of the truck being passed in the rearview mirror and clearing it well
- As soon as the passing vehicle's front bumper reaches the truck's cab
- Before the truck appears in the side mirror
- Immediately after pulling alongside the truck
Answer: After seeing the front of the truck being passed in the rearview mirror and clearing it well. The manual gives a visibility check for returning after a pass: see the front of the passed vehicle in the rearview mirror and make sure your vehicle is well clear. That view indicates useful separation rather than merely being beside the truck. Moving over when the truck is still alongside can cut into its path, and an early return reduces the margin needed if the larger vehicle must brake. Finish the pass, confirm the truck's front is visible behind you, then signal and ease over.