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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. If your bus is equipped with a roof-mounted strobe light, you should use it:
only at night.
when you have limited visibility.
only in an emergency.
whenever possible.
2. How many drinks per hour can be handled by the liver?
About 2 drinks per hour.
About 1 drink per hour.
About 4 drinks per hour.
About 3 drinks per hour.
3. Vehicles with ABS have ______ malfunction lamps on the bus’s instrument panel to tell you if something is not working.
4. When you double your speed, the braking distance is:
4 times longer.
2 times longer.
the same.
3 times longer.
5. You should adjust the outside left and right side flat mirrors so you can see:
the right and left front tires touching the ground.
the rear tires touching the ground.
400 feet behind the bus.
All of the above.
6. ABS malfunction lamps are located:
on the instrument panel.
on the driver'door.
under the hood.
None of the above.
7. You should use the overhead inside rearview mirror to:
see the front bumper "danger zone" area in front of the bus.
see what is happening on the bus.
to monitor the left and right sides of the bus at a wide angle.
to monitor traffic and check clearances.
8. The overhead inside rearview mirror is:
mounted at the side of the windshield.
located below the outside flat mirrors.
mounted on the left front corner of the bus.
mounted above the windshield on the driver's side area of the bus.
9. Pre-trip inspections:
are optional when the driver is familiar with the vehicle.
should not be done unless the vehicle has problems that could cause a breakdown.
should always be done in the same order.
should not be done when a vehicle inspection report is available.
10. When passing a parked vehicle, which of the following is the only thing you do NOT need to watch out for?
Driver's door opening
Lights coming on
Passenger door opening
Wheels starting to turn
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WI CDL Bus Test

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