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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. When driving in heavy traffic, the safest speed is:
slightly higher than the speed of other traffic.
the speed of traffic.
the posted speed limit.
slower than the speed of other traffic.
2. Properly adjusted mirrors on a school bus should allow the driver to see:
the vehicles in front of the bus.
the front tires touching the ground.
the sides of the school bus.
under the school bus.
3. When driving a school bus in strong winds, you should:
Avoid pulling off the road to wait.
Speed up to get away from the wind as quickly as possible.
Keep a strong grip on the steering wheel and try to anticipate gusts.
All of the above.
4. If you recognize a distracted driver on the road, you should:
flash your brake lights at them.
follow them closely.
give them plenty of room.
try to pass them.
5. 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.
6. Baggage and freight should be secured in a way that:
blocks one exit, but allows riders to exit by any remaining window or door in an emergency.
allows riders to easily identify their baggage before they get off the bus in an emergency.
allows riders to exit by any window or door in an emergency.
allows riders to quickly take their baggage with them in an emergency.
7. As you approach off ramps and on ramps, remember:
that downgrades make it easier to reduce speed.
to always brake and turn at the same time.
that the posted speed limit may not be safe for larger vehicles.
to maintain your highway speed.
8. The header board, if equipped, should:
can be dangerous.
never be used for cargo.
not be used in case of a crash or emergency stop.
block the forward movement of any cargo you carry.
9. After stopping, you should:
Turn on the right turn signal indicator.
Have the students board the school bus as quickly as possible.
Activate the alternating red lights and ensure the stop arm is extended.
Activate the alternating amber lights and ensure the stop arm is extended.
10. When checking tires, which of the following is not a problem?
4/32 inch tread depth on front tires
Radial and bias-ply tires used together
Cracked valve stems
Too much air pressure
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CO School Bus Test

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