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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 Wisconsin school bus test, and you must also pass skills tests in a school bus. The WI 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 Wisconsin CDL Manual: School Buses, Vehicle Inspection Test, Basic Control Skills Test and Road Test. After studying, take this WI CDL practice test to prepare for the actual bus test!
1. When backing, you should:
back quickly.
back and turn toward the right side whenever possible.
use the mirrors on both sides.
only use mirror on the driver's side.
2. Why should you back toward the driver's side?
You can more easily correct any steering errors.
You can see better and watch the rear of your vehicle by looking out the side window.
Using double clutching requires practice.
All of the above.
3. Skids caused by acceleration can usually be stopped by:
swerving to the left.
swerving to the right.
applying the brakes firmly.
taking your foot off the accelerator.
4. When approaching a bus stop in a 45 mph or greater speed zone, you should activate the alternating flashing amber warning lights when the bus is at least _______ from the stop.
300 feet
15 feet
50 feet
500 feet
5. During unloading, if the school bus driver cannot account for a student outside the bus, the driver should:
assume the student got back on the bus.
secure the bus, and check around and underneath the bus.
walk through the bus to ensure the students is not on the bus.
All of the above.
6. Never refuel your bus:
while the windows are open.
in a closed building with riders on board.
with a higher grade of fuel.
All of the above.
7. Right after it starts to rain, the road is very slippery. Why?
Because the water mixes with oil left on the road by vehicles.
Because rain is very slippery.
Because black ice may form on the road.
None of the above.
8. Properly adjusted outside mirrors should allow school bus drivers to see _______ behind the bus.
4 bus lengths
3 bus lengths
2 bus lengths
1 bus length
9. When driving in fog, drivers should:
use the windshield wipers.
use windshield washer antifreeze.
use high beams.
use low beams.
10. Escape ramps:
can only be used by trucks or passenger vehicles.
have been built to stop runaway vehicles on steep downgrades.
are used to safely leave the highway.
All of the above.
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WI CDL 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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