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Iowa driver's examination

(From the 2019 Iowa driver handbook)
Number of tests: 24
Number of questions: 35
Passing score: 28
Directions: To get an Iowa’s license, you will have to take the vision screening and a knowledge test if you have an invalid or expired (over one year) out-of-state license, or if you have not had a driver’s license before. If you have a valid out-of-state license that allows you to drive by yourself, the driving test may be waived.

The Iowa knowledge test shows how well you understand road signs, traffic laws, and safe-driving practices. Everything you must know to pass the knowledge test is in Iowa Driver’s Manual guide. The Knowledge tests include 35 multiple choice questions

If you answer at least 28 questions correctly. you will be well prepared to take the knowledge test for your learner's permit.
You have made error so far
Passing grade —
7 or fewer errors
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1.
This road sign means:
Idaho crossroad road sign
Increase your speed.
Railroad crossing ahead.
Intersection ahead.
Four-way stop ahead.
2.
You are driving when it begins to rain. You should:
Drive faster than surrounding traffic.
Drive at the maximum posted speed limit.
Slow down.
Drive closely behind the vehicle in front of you.
3.
You must stop at an intersection when you see a:
Flashing red light.
Steady yellow light.
Yellow arrow.
Flashing yellow light.
4.
You are approaching an intersection at the posted speed limit when the signal turns yellow. You should:
Slow down and proceed through the intersection without caution.
Speed up to cross the intersection before the light turns red.
Stop before entering the intersection, if you can do so safely.
5.
If you find that the roadway ahead of you is flooded, you should:
Slam on the brakes.
Not drive through the flooded area. Turn around and find another route.
Drive only in the center of the roadway.
6.
Make room for cars that are entering the freeway by:
Slowing down.
Merging into a different lane.
Maintaining your speed and position.
7.
You may avoid the risks of alcohol-related crashes by:
Deciding before you start drinking that you are not going to drive.
Simply saying, "No thanks, I'm driving," if someone offers you a drink.
Calling a taxi.
Doing any of the above.
8.
At intersections, crosswalks, and railroad crossings, you should always:
Stop, listen, and proceed cautiously.
Look to the sides of your vehicle to see what is coming.
Slowly pass vehicles that seem to be stopped for no reason.
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