California Driver License (DMV) Written Practice Test

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Ace your California DMV written test! Prepare for the exam by practicing hundreds of multiple-choice questions covering traffic laws and road signs. Boost your knowledge, gain confidence, and increase your chances of passing the test on your first try.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

When windows are foggy, you should:

Drive faster
Remove the fog with the defroster
Open your windows
Wipe the fog off the windows

The correct answer is: Remove the fog with the defroster

Driving faster may seem like a solution to foggy windows, but it can actually make the problem worse by causing the windows to fog up even more due to the difference in temperature between the inside and outside of the car. Additionally, driving with foggy windows is dangerous and can lead to accidents. Opening the windows is not recommended either, as it can let cold air in and make the car's interior even colder. Wiping the fog off the windows may temporarily improve visibility, but it is not a long-term solution and can be distracting while driving. The best solution for foggy windows is to use the defroster, which uses warm air to remove the moisture and clear the windows. This will ensure safe and clear visibility while driving.