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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 Washington school bus test, and you must also pass skills tests in a school bus. The WA 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 Washington CDL Manual: School Buses, Vehicle Inspection Test, Basic Control Skills Test and Road Test. After studying, take this WA CDL practice test to prepare for the actual bus test!
1. During an emergency student safety is generally best maintained by:
keeping students on the bus.
leading students downwind of the bus if fire is present.
leading students as far away from the bus as possible.
2. Your vehicle has air brakes. To stop, you should:
pull the parking brake control knob out.
release the accelerator, push in the clutch, and shift to Neutral at the same time.
push the brake pedal down.
3. To correct a drive-wheel braking skid, you should:
apply the brakes and turn in the direction of the skid.
stop braking.
4. When changing lanes, you should:
do it quickly.
not use your turn signals.
None of the above.
5. When driving in very hot weather, you may have to:
decrease your following distance.
increase your speed until the tires cool off.
reduce your speed to prevent overheating.
6. When stopping you should push the brake pedal down:
7. The safety valve is usually set to open at:
150 psi.
200 psi.
100 psi.
8. The outside convex mirrors are located:
above the windshield on the driver's side area of the bus.
below the outside flat mirrors.
above the outside flat mirrors.
9. If you perform the skills test in a vehicle equipped with air over hydraulic brakes:
you will be required to operate vehicles with air brakes.
you will be required to take the tank vehicle test.
you will be restricted from operating vehicles with air brakes.
10. Of all the space around your vehicle, the most important is:
the area behind the vehicle.
the area ahead of the vehicle.
the area to the sides of the vehicle.
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WA School Bus CDL 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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