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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 Maryland school bus test, and you must also pass skills tests in a school bus. The MD 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 Maryland CDL Manual: School Buses, Vehicle Inspection Test, Basic Control Skills Test and Road Test. After studying, take this MD CDL practice test to prepare for the actual bus test!
1. When approaching a vehicle with a distracted driver, you should:
maintain your safe following distance.
sound your horn.
quickly pass the vehicle.
change lanes quickly.
2. Before starting down a hill, you should slow down and shift down:
to a gear that will cause your brakes to overheat.
to a speed that you can control without using the brakes hard.
to a gear that will cause your engine to exceed its redline.
so you can coast downhill.
3. When stopping to pick up students at the bus stop, which of the following comes after all the others?
Check to confirm that all traffic has stopped before opening the door and signaling students to approach.
Activate the alternating red lights when traffic is a safe distance from the school bus.
Activate the alternating amber lights and open the door when traffic is a safe distance from the school bus.
Place the transmission in park or in neutral and set the parking brake.
4. If you hear a loud loud "bang" and the steering feels "heavy", you should:
hold the steering wheel firmly and stay off the brake.
check your rearview mirrors to see if you have a flat tire.
brake hard and pull off the road.
pump the brakes until the vehicle has slowed down.
5. When driving on slippery roads, you should NOT:
go slowly.
try to anticipate stops early.
watch far enough ahead to keep a steady speed.
use the engine brake.
6. A disabled bus with riders aboard the vehicle:
should not be towed or pushed, unless getting off would be unsafe.
should be abandoned immediately.
should only be pushed or towed by another bus.
should be towed or pushed, unless staying on the bus would be unsafe.
7. Your vehicle has air brakes. To stop, you should:
pump the brake pedal 3 times.
push the brake pedal down.
pull the parking brake control knob out.
release the accelerator, push in the clutch, and shift to Neutral at the same time.
8. Baggage and freight should be secured in a way that:
allows riders to exit by any window or door in an emergency.
blocks one exit, but allows riders to exit by any remaining window or door in an emergency.
allows riders to easily identify their baggage before they get off the bus in an emergency.
allows riders to quickly take their baggage with them in an emergency.
9. After starting the engine, the ABS light stays on. This means:
the ABS is working properly.
the ABS is not working properly.
the ABS oil level is not adequate.
the ABS is in Neutral.
10. The overhead inside rearview mirror is used to:
allow congested traffic to disperse.
monitor passenger activity inside the school bus.
monitor the blind spot area directly behind the driver’s seat.
perform a safe stop at designated unloading areas.
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MD School Bus Test

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