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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 Idaho school bus test, and you must also pass skills tests in a school bus. The ID 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 Idaho CDL Manual: School Buses, Vehicle Inspection Test, Basic Control Skills Test and Road Test. After studying, take this ID CDL practice test to prepare for the actual bus test!
1. When dealing with a disruptive rider, you should:
give the rider a cup of coffee.
discharge the rider at the next scheduled stop.
discharge such rider immediately.
2. If the school bus is equipped with a handicap lift, you should:
look for bent, loose, or broken parts, such as tie rods.
look for damaged, leaking or missing parts and make sure that the lift is fully retracted and latched.
test what happens under braking conditions.
3. When parked on the side of the road, you should:
use the 4-way emergency flashers.
turn off all lights.
flash your brake lights.
4. If you lose ABS control on one or more wheels, you should:
immediately report it to the motor carrier.
fully apply the brakes until you stop.
drive normally (you still have regular brakes), but get the system serviced soon.
5. When loading and unloading students, drivers of a school bus should check their mirrors:
After entering the traffic.
After closing the door.
6. Which of the following is NOT true?
ABS will change the way you normally brake.
ABS only comes into play when a wheel would have locked up because of over braking.
ABS won't compensate for bad brakes.
7. Riders getting on or off the bus:
are likely to be disruptive.
can stumble and should be supervised.
should not be supervised.
8. All mirrors should be viewed in a logical sequence to ensure that:
monitor passenger activity inside the bus.
direct vision and mirror view vision overlap.
a child or object is not in any of the danger zones.
9. After stopping, you should:
Have the students board the school bus as quickly as possible.
Activate the alternating red lights and ensure the stop arm is extended.
Turn on the right turn signal indicator.
10. Before starting down a hill, you should slow down and shift down:
to a gear that will cause your engine to exceed its redline.
so you can coast downhill.
to a speed that you can control without using the brakes hard.
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ID School Bus Test

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