Instructions

Knowledge Test Class B

This license is required for driving a single vehicle with a GVWR of more than 26,001 pounds, and a trailer not to exceed 10,000 pounds gross vehicle weight rating, or a vehicle designed to transport 24 or more people (including the driver). To receive this license, applicants must pass a 50-question test. To pass, applicants must answer 40 questions correctly. Each question has four possible answer choices. Test questions come from the Commercial Driver License Manual. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Pre-Trip Vehicle Inspection Test, Basic Vehicle Control Skills Test and On-Road Driving.. Endorsements that may be used with a Class B CDL are: Hazardous materials, Tank, Passenger, HazMat and Tank, Air Brakes and School bus.

Number of Question 50

Passing Score 40

1. An air brake-equipped vehicle traveling at a speed of 55 mph under ideal driving conditions will need approximately ____ to come to a complete stop.

100 feet

250 feet

300 feet

450 feet

A vehicle's total stopping distance is made up of perception distance, reaction distance, brake lag distance, and braking distance. With all of these factors included, an air brake-equipped vehicle traveling at a speed of 55 mph under ideal driving conditions will need approximately 450 feet to come to a complete stop.

2. What should you do if the brake pedal does not build up pressure?

Upshift.

Downshift.

Hold the brake pedal down as far as it will go.

Pump the brakes.

If you lose pressure in a hydraulic brake system, one appropriate response is to shift down into a lower gear. This will help slow the vehicle.

3. In a convex mirror, objects seem ____ than they actually are.

Larger

Smaller

Closer

A convex mirror makes objects seem smaller and farther away than they actually are.

4. Federal and state laws require:

Drivers to regularly inspect their vehicles.

Drivers to inspect their vehicles, but only if they believe there may be a problem.

Drivers to inspect their vehicles if planning to travel out-of-state.

Drivers to inspect their vehicles, but only if they will be transporting hazardous materials.

Commercial drivers are required by federal and state laws to inspect their vehicles before every trip. Regular inspections can help drivers identify issues before they become dangerous and costly.

5. When passing another vehicle, you should:

Make eye contact with the driver.

Assume the driver doesn’t see you.

Honk your horn.

Wait for the other driver to signal that it is safe to do so.

Whenever you pass another driver, bicyclist, or pedestrian, you should assume as a precaution that they do not see you.

6. If a vehicle is equipped with power steering, the hoses should be checked:

For leaks.

To ensure that they are still clear.

To ensure that they are connected to the battery.

For the proper amount of brake fluid.

When inspecting a vehicle that is equipped with power steering, check the hoses, pumps, and fluid level. In particular, you should look for leaks in the hoses.

7. If your truck or trailer catches fire, you should:

Park in a congested area near trees.

Pull into a service station.

Park near other vehicles.

Park in an open area.

If there is a fire in your vehicle, the first thing you need to do is leave the road and stop. Park in an open area away from anything that could catch fire, such as plants or other vehicles. Do not pull into a service station.

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