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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 New Mexico school bus test, and you must also pass skills tests in a school bus. The NM 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 New Mexico CDL Manual: School Buses, Vehicle Inspection Test, Basic Control Skills Test and Road Test. After studying, take this NM CDL practice test to prepare for the actual bus test!
1. When inspecting the vehicle, make sure that:
all internal and external mirrors and mirror brackets are not damaged.
all emergency exits are not damaged.
All of the above.
2. What should you do if you miss a student's unloading stop?
Turn on the right turn signal and try to stop to unload the student.
Back up whenever possible.
Do not back up, and follow the local procedure.
3. When driving in high winds, you should:
change lanes frequently.
reduce your speed.
increase your speed.
4. When loading and unloading students, drivers of a school bus should check their mirrors:
After closing the door.
After entering the traffic.
5. Do not push or tow a disabled bus with riders aboard the vehicle, unless:
getting off would be unsafe.
the distance to be covered is less than 5 miles.
the majority of the passengers agree.
6. If the school bus is equipped with a handicap lift, you should:
test what happens under braking conditions.
look for damaged, leaking or missing parts and make sure that the lift is fully retracted and latched.
look for bent, loose, or broken parts, such as tie rods.
7. When you are driving a school bus, the emergency exit doors or windows must always:
have a red door light turned on.
be closed.
None of the above.
8. ABS (Anti-lock Braking System):
keeps your wheels from locking when you apply the brakes hard.
is an addition to your normal brakes.
All of the above.
9. Skids caused by acceleration can usually be stopped by:
taking your foot off the accelerator.
swerving to the right.
applying the brakes firmly.
10. It is safer to drive over (rather than to avoid) which of the following?
Cardboard boxes
Paper and cloth sacks
None of the above.
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NM School Bus CDL Test

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