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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 Wyoming school bus test, and you must also pass skills tests in a school bus. The WY 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 Wyoming CDL Manual: School Buses, Vehicle Inspection Test, Basic Control Skills Test and Road Test. After studying, take this WY CDL practice test to prepare for the actual bus test!
1. How many drinks per hour can be handled by the liver?
About 3 drinks per hour.
About 1 drink per hour.
About 4 drinks per hour.
About 2 drinks per hour.
2. You should position convex mirrors to see:
the entire side of the bus up to the mirror mounts.
at least 1 traffic lane on either side of the bus.
the front of the rear tires touching the ground.
All of the above.
3. Move-over laws require drivers to _________ when approaching an emergency vehicle stopped on the roadside or a work zone.
change direction
slow down and change lanes
sound their horn
4. Emergency roof hatches:
must never be opened while driving.
may be partially opened for fresh air.
should be left opened as a regular practice.
None of the above.
5. Hydroplaning is more likely if:
the road is wet.
tire tread is worn.
tire pressure is low.
All of the above.
6. When inspecting your bus, make sure that:
emergency exit handles are in safe working condition.
signaling devices are working.
seats are safe for riders.
all of the above have been checked.
7. During an emergency student safety is generally best maintained by:
keeping students on the bus.
having the students stand at least 50 feet off the road in the direction of oncoming traffic.
leading students as far away from the bus as possible.
leading students downwind of the bus if fire is present.
8. Always check the interior of the bus before driving, including:
Floor covering
Emergency exit handles
Handholds and railings
All of the above.
9. 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.
to maintain your highway speed.
that the posted speed limit may not be safe for larger vehicles.
10. If you are driving a school bus, the 4-way emergency flashers should:
be used only when a train is approaching.
be activated after crossing railroad tracks.
never be used.
be activated before crossing railroad tracks.
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WY CDL School Bus Test

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