To legally operate a motor vehicle, motorcycle, moped, or motor-driven cycle on public roads in Washington State, you must have a valid driver license. You are required to pass the medical and vision screenings, as well as the WA DOL knowledge test and the driving test, in order to obtain a driver license. The Washington DMV written test is intended to assess your knowledge of road signs, road rules, traffic laws, as well as safe driving practices. The Washington Driver's Manual contains all you need to know to pass the test. This guide should be thoroughly studied. The WA DOL written exam is a 40-multiple-choice-question test, and you must answer 32 of them correctly to pass. Prepare for the official Washington knowledge test by practicing with our Washington practice test permit.