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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 California school bus test, and you must also pass skills tests in a school bus. The CA 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 California CDL Manual: School Buses, Vehicle Inspection Test, Basic Control Skills Test and Road Test. After studying, take this CA CDL practice test to prepare for the actual bus test!
1. During unloading, if the school bus driver cannot account for a student outside the bus, the driver should:
secure the bus, and check around and underneath the bus.
walk through the bus to ensure the students is not on the bus.
assume the student got back on the bus.
2. If your school bus is equipped with ABS, it will have:
an ABS certification on the driver’s side area of the bus.
a yellow ABS malfunction lamp on the instrument panel.
None of the above.
3. If the ABS is not working:
you still have normal brake functions.
the vehicle will have no brakes.
the vehicle will have weak brakes.
4. When approaching a vehicle with a distracted driver, you should:
change lanes quickly.
maintain your safe following distance.
quickly pass the vehicle.
5. When dealing with a drunk or disruptive rider, you must:
discharge the disruptive rider immediately.
ensure the rider's safety, as well as that of others.
take this rider to the closest police department.
6. Students should board the bus:
only if the driver knows their names.
quickly.
only when signaled by the driver.
7. Buses must never carry:
hospital supplies.
small arms ammunition labeled ORM-D.
tear gas.
8. Properly adjusted outside convex mirrors should allow school bus drivers to see:
the entire side of the bus up to the mirror mounts.
the area from the front of the bus to the service door.
the entire area in front of the bus.
9. Properly adjusted crossover mirrors allow you to see:
the right and left front tires touching the ground.
the entire area in front of the bus.
All of the above.
10. The heavier the vehicle:
the less work the brakes must do to stop it.
the more work the brakes must do to stop it.
the higher the center of gravity will be.
 
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CA School Bus Test

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