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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. A disabled bus with riders aboard the vehicle:
should only be pushed or towed by another bus.
should be abandoned immediately.
should not be towed or pushed, unless getting off would be unsafe.
should be towed or pushed, unless staying on the bus would be unsafe.
2. If you hear a loud loud "bang" and the steering feels "heavy", you should:
hold the steering wheel firmly and stay off the brake.
brake hard and pull off the road.
check your rearview mirrors to see if you have a flat tire.
pump the brakes until the vehicle has slowed down.
3. When you need to brake, you should warn the drivers behind:
by turning on the 4-way emergency flashers.
by flashing your brake lights.
by making gestures.
by changing lanes.
4. If your bus leans toward the outside on a banked curve, the bus:
is going too slow.
is going at the proper speed.
is going too fast.
has good traction.
5. The location of school bus stops:
is established the students and their parents.
is changed every year.
may be changed by the driver if the majority of students vote for the change.
is established by each school district and should never be changed without approval.
6. When dealing with a drunk or disruptive rider, you must:
take this rider to the closest police department.
ensure the rider's safety, as well as that of others.
discharge the disruptive rider immediately.
All of the above.
7. To ensure rider safety, bus drivers should always check the interior of the bus before driving. Aisles and stairwells should always be:
reserved for seniors.
8. If you are loading students along the route and cannot account for a student, you should:
secure the bus, take the key and check around and underneath the bus.
ask other students if they saw the missing students.
call the relevant authorities.
secure the bus, adjust the mirrors and prepare to leave.
9. What factors can cause brakes to fail or fade?
Not relying on the engine braking effect
Brakes out of adjustment
Excessive use of the service brakes
All of the above.
10. School bus drivers must check that the entry door is not damaged and:
operates smoothly and closes securely from the outside.
trailer air connectors are sealed.
operates smoothly and closes securely from the inside.
None of the above.
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WI School Bus Test

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