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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 North Carolina school bus test, and you must also pass skills tests in a school bus. The NC 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 North Carolina CDL Manual: School Buses, Vehicle Inspection Test, Basic Control Skills Test and Road Test. After studying, take this NC CDL practice test to prepare for the actual bus test!
1. The safety valve is usually set to open at:
100 psi.
150 psi.
200 psi.
75 psi.
2. How does ABS help you?
ABS helps you avoid wheel lock up and maintain control when you brake hard on slippery surfaces.
ABS makes stab braking more effective.
ABS replaces your normal brakes and helps you  to stop faster.
ABS always shortens your stopping distance.
3. If your bus gets stuck on a railroad track, the students:
should be evacuated and moved as far away from the tracks as possible.
should be evacuated and stand near the bus.
should remain on the bus.
None of the above.
4. If you recognize a distracted driver on the road, you should:
give them plenty of room.
follow them closely.
try to pass them.
flash your brake lights at them.
5. To recognize distracted drivers, you should watch for all of the following except:
Vehicles traveling at inconsistent speeds.
Students sitting on a bench waiting for a bus.
Drivers talking on the phone.
Drivers who are involved in conversations with their passengers.
6. If you doubt you have enough space to pass under a bridge, you should:
go slowly.
turn on your 4-way emergency flashers.
drive faster.
turn on your headlights.
7. When making a turn you should:
make gestures to get the attention of other drivers.
turn the signal off before entering the turn.
signal early.
honk your horn.
8. Backing a school bus is:
usually encouraged.
strongly discouraged.
always safe if you use caution.
strongly encouraged.
9. When boarding the bus, students should:
be quick.
be in single file.
be in pairs.
not use the handrail.
10. When stopping at drawbridges that do not have a signal light or traffic control attendant, you must stop at least _____ before the draw of the bridge.
25 feet
50 feet
150 feet
100 feet
 
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NC School Bus Test

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