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The school bus endorsement applies to applicants who wish to drive a school bus in any Class A or B CDL. To add an S endorsement to your CLP/CDL, you must pass the Washington school bus test, and you must also pass skills tests in a school bus. The WA CDL bus test consists of 20 questions, and you'll need at least 16 correct answers to pass (80%). The knowledge test covers the following sections of the Washington CDL Manual: School Buses, Vehicle Inspection Test, Basic Control Skills Test and Road Test. After studying, take this WA CDL practice test to prepare for the actual bus test!
1. Select the best answer. Before operating the school bus, you should always:
check the right mirror.
check the left mirror.
check each mirror.
2. When driving in high winds, you should:
increase your speed.
change lanes frequently.
reduce your speed.
3. The driver MUST evacuate the bus when:
there is a threat of a fire.
the position of the bus may change and increase the danger.
All of the above.
4. You hear a loud "bang" which sounds like a tire blowout. You should:
keep driving as normal.
check the tires at the next stop.
assume you have a tire failure.
5. If driving a charter bus, you should:
not allow passengers on the bus until departure time.
explain the passenger comfort and safety rules while driving.
allow passengers on the bus early.
6. The most students are killed each year:
as passengers inside of a school bus.
by drunk school bus drivers.
while getting on and off the bus.
7. Skids caused by acceleration can usually be stopped by:
swerving to the right.
applying the brakes firmly.
taking your foot off the accelerator.
8. If you have to drive off the road, you should:
keep one set of wheels on the pavement, if possible.
fully apply the brakes until your speed has dropped to about 20 mph.
brake as hard as you can to maintain control.
9. When changing lanes, you should:
do it slowly, so a driver you did not see may have a chance to honk their horn.
do it quickly so other vehicles won't get into the lane.
turn sharply.
10. When driving in fog, drivers should:
use the windshield wipers.
use low beams.
use high beams.
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WA School Bus Test

Number of questions: 20
Correct answers to pass:16
Passing score:80%
Number of questions: 20
Correct answers to pass:16
Passing score:80%
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