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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 Colorado school bus test, and you must also pass skills tests in a school bus. The CO 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 Colorado CDL Manual: School Buses, Vehicle Inspection Test, Basic Control Skills Test and Road Test. After studying, take this CO CDL practice test to prepare for the actual bus test!
1. ABS:
always shortens your overall stopping distance.
keeps your wheels from locking up during hard brake applications.
allows you to drive faster.
helps increase brake pressure.
2. You should NOT use the parking brakes if:
the brakes are cold.
the brakes are very hot.
the brakes are too dry.
All of the above.
3. In your mirror, you see a car approaching from the rear. The next time you check your mirror, you don't see the car. If you wish to change lanes, you should:
wait until you are sure the car isn't in your blind spot.
ease into the other lane slowly so the other car can get out of the way.
assume the car left the roadway and change lanes as normal.
None of the above.
4. If your bus leans toward the outside on a banked curve, the bus:
has good traction.
is going too slow.
is going too fast.
is going at the proper speed.
5. When inspecting your bus, make sure that:
seats are safe for riders.
signaling devices are working.
emergency exit handles are in safe working condition.
all of the above have been checked.
6. Buses must never carry:
irritating material.
small arms ammunition labeled ORM-D.
emergency hospital supplies.
All of the above.
7. When changing lanes, you should check your mirrors:
After you have signaled.
Before you change lanes.
After you complete the lane change.
All of the above.
8. If your bus gets stuck on a railroad track, you should:
keep students on the bus and contact your dispatcher to explain the situation.
lead students across the tracks, and have them stand at least 100 feet off tracks.
keep students on the bus and call for help.
lead students as far away from the tracks as possible, in the direction of any oncoming train.
9. If you realize you are going to be later to your destination than you expected, you should:
deal with it and accept the delay.
exceed the posted speed limit when no other vehicles are near.
do your best to avoid the delay.
speed up.
10. A school bus driver must evacuate the bus when:
the bus is stalled on a railroad crossing.
the bus is stalled on the shoulder of a 4-lane divided highway and it's snowing.
you have pull off the road and stop.
the ABS is not working properly.
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CO CDL Bus Test

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