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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 South Dakota school bus test, and you must also pass skills tests in a school bus. The SD 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 South Dakota CDL Manual: School Buses, Vehicle Inspection Test, Basic Control Skills Test and Road Test. After studying, take this SD CDL practice test to prepare for the actual bus test!
1. Buses must never carry:
small arms ammunition labeled ORM-D.
drunk passengers.
tear gas.
hospital supplies.
2. You hear a loud "bang" which sounds like a tire blowout. You should:
keep driving as normal.
inspect your tires with your mirrors.
check the tires at the next stop.
assume you have a tire failure.
3. Service brakes should:
always be checked before applying the brakes.
only be checked by a mechanic.
be checked before each trip.
All of the above.
4. Before crossing railroad tracks you should:
place the transmission in first gear.
stop no closer than 100 feet from the nearest rail.
stay to the left of the roadway if possible.
open the service door and driver's window to look and listen for approaching trains.
5. Before leaving a bus stop, you should:
walk through the bus to check for items left by students.
walk through the bus and around the bus to look for open windows and doors.
make sure no students are around or returning to the bus.
walk through the bus to check for sleeping students.
6. Properly adjusted outside convex mirrors should allow school bus drivers to see:
all of the students.
the entire area in front of the bus.
the entire side of the bus up to the mirror mounts.
the area from the front of the bus to the service door.
7. Brakes out of adjustment can cause the other brakes to:
overheat and fade.
work better.
last longer.
apply more braking power.
8. Which of the following is not a rule for using turn signals?
Don't signal unless another vehicle is behind you
Signal continuously
Cancel your signal after you have turned
Signal early
9. Escape ramps:
have been built to stop runaway vehicles on steep downgrades.
can only be used by trucks or passenger vehicles.
are used to safely leave the highway.
All of the above.
10. At railroad crossings, you must stop no closer than ___ feet and no farther than ___ feet from the nearest rail.
25; 75
50; 100
20; 40
15; 50
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SD School Bus CDL Test

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