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Iowa driver's examination

(From the 2018 Iowa driver handbook)
Number of tests: 16
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.
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.
2.
This sign is a warning that you are approaching:
An intersection.
A crosswalk.
A railroad crossing.
3.
When driving in work zones, you should:
Follow the driver in front of you closely.
Pass the driver in front of you as soon as you can.
Avoid tailgating and keep a safe following distance.
4.
You should drive on the shoulder to pass a car:
If the vehicle ahead of you is turning left.
Under no circumstances.
If the shoulder is wide enough.
5.
If you plan to pass another vehicle, you should:
Not assume the other driver will make space for you to return to your lane.
Assume the other driver will let you pass if you use your turn signal.
Assume the other driver will maintain a constant speed.
6.
A large truck is ahead of you and is turning right onto a street with two lanes in each direction. The truck:
May complete its turn in either of the two lanes.
May have to swing wide to complete the right turn.
Must stay in the right lane at all times while turning.
7.
If a tire suddenly blows out while you are driving, you should:
Grip the steering wheel firmly, slow down, and exit the traffic lane.
Pump the brakes rapidly.
Brake hard and steer toward the right edge of the roadway.
8.
If you are continually being passed on the right and the left while driving in the center lane of an expressway, you should:
Stay in the center lane.
Move to the lane on your right.
Move to the lane on your left.
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