This endorsement is required for driving a school bus. To receive this endorsement, applicants must pass a test. The test consists of 20 multiple choice.. Read More

This endorsement is required for driving a school bus. To receive this endorsement, applicants must pass a test. The test consists of 20 multiple choice questions. To pass, the applicant must answer at least 16 questions correctly. Each question has three possible answer choices. Test questions come from the Idaho Commercial Driver’s License Manual. Questions come from chapters covering: Safety, Passengers, School Buses, Cargo, Air Brakes, Pre-Trip Vehicle Inspection Test, Basic Vehicle Control Skills Test and On-Road Driving. The School Bus endorsement can be used with the Class A, B or C CDL.

Number of Question
Passing Score

1. If other vehicles are having a difficult time getting around your truck on a road with two or more lanes, you should:

You should stay in the right lane of a multilane road if your vehicle is being slowed down by a heavy load. Allow other vehicles to pass your truck using the left lane.

2. Texting while driving is especially dangerous because:

Texting while driving is particularly dangerous because it is both a mental and physical distraction to the driver. In addition to diverting a driver's mental attention away from the road, texting requires a person to remove at least one hand from the vehicle's controls.

3. What do the two systems of a dual air brake system share?

Both systems in a dual air brake systems share a single air compressor. If the air compressor is damaged, neither system will be able to operate properly.

4. What is often found in compressed air?

Compressed air in an air brake system usually contains a certain amount of water and compressor oil. The water and oil can damage the brakes if left to accumulate in the system. Tanks must be drained regularly to remove this build-up.

5. During a basic vehicle controls skills test exercise, your vehicle's final position should be:

You should finish each exercise with your vehicle in the exact position described by the examiner. You can be penalized for failing to complete an exercise exactly in the manner described by the examiner, potentially resulting in failure of the basic control skills test.

6. What is brake lag?

Because air takes time to flow through the air lines to the brakes, air brakes cannot begin working instantly. There is often a brake lag of at least one-half of a second between the moment the brake pedal is pressed and the moment the brakes begin to work.

7. A driver should ensure that:

It is essential to the safe operation of a CMV that cargo be properly loaded. Improper loading can affect handling and damage the vehicle. Additionally, improperly loaded materials can cause injury or death by falling off of the vehicle.
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