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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. You hear a loud "bang" which sounds like a tire blowout. You should:
assume you have a tire failure.
keep driving as normal.
inspect your tires with your mirrors.
check the tires at the next stop.
2. School bus drivers should tell students to exit the bus and walk at least ______ from the side of the bus.
8 feet away
5 feet away
10 feet away
25 feet away
3. All mirrors should be viewed in a logical sequence to ensure that:
the right and left front tires are touching the ground.
direct vision and mirror view vision overlap.
a child or object is not in any of the danger zones.
monitor passenger activity inside the bus.
4. When a school bus is stalled on a railroad-highway crossing, the driver should:
evacuate the bus and lead the students upwind of the bus.
keep the students on the bus to maintain student safety and control.
evacuate the bus and lead the students as far away from railroad tracks as possible and in the direction of any oncoming train.
evacuate the bus and escort the students to a nearby ditch.
5. The stop signal arm and flashing red signals of a school bus must be used only:
when the school bus is stopped on a street or highway to load or unload students.
in heavy rain.
in heavy traffic.
during sharp turns.
6. ABS (Anti-lock Braking System):
keeps your wheels from locking when you apply the brakes hard.
is an addition to your normal brakes.
does not decrease or increase your normal braking capability.
All of the above.
7. Carry-on baggage:
should not be left in the aisle.
may be left in the aisle.
must be left in the aisle.
None of the above.
8. School buses:
are only equipped with ABS when transporting students.
are only equipped with ABS if built after March 2010.
may be equipped with ABS.
are never equipped with ABS.
9. When driving, you should check your mirrors:
every 4 seconds.
every 10 seconds.
only when there may be a problem.
10. When approaching a bus stop, the school bus driver should:
approach cautiously.
stop on the sidewalk.
not use the mirrors.
All of the above.
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CO School Bus Test

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