Instructions

Knowledge Test Class A

This license is required for driving any legal combination of vehicles, with a gross combination weight rating of 26,001 pounds or more, provided the GVWR of a trailer exceeds 10,000.. Read More

This license is required for driving any legal combination of vehicles, with a gross combination weight rating of 26,001 pounds or more, provided the GVWR of a trailer exceeds 10,000 pounds. To receive this license, applicants must pass a 50-question test. Test questions come from the Ohio Commercial Drivers License Manual. To pass, applicants must answer 40 questions correctly. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Combination Vehicles, Pre-Trip Vehicle Inspection Test, Basic Vehicle Control Skills Test and On-Road Driving. Endorsements that may be used with a Class A CDL are: Hazardous materials, Tank, Passenger, Doubles/Triples, HazMat, Tank, Air Brakes and School bus.

Number of Question 50

Passing Score 40

1. While still below the legal limit, a driver operating a CMV with a detectable amount of alcohol in their system will:

Result in an out-of-service order for two hours.

Result in an out-of-service order for 10 hours.

Result in an out-of-service order for 24 hours.

If you are found to have any detectable amount of alcohol in your system while operating a CMV but your blood alcohol concentration (BAC) is still below the legal limit of 0.04 percent, you will be put out-of-service for 24 hours. It is both illegal and dangerous to operate a motor vehicle while under the influence of alcohol.

2. Broken suspension parts:

Are not a cause for concern.

Are extremely dangerous.

Cannot be identified.

The suspension system holds up a vehicle and its load while keeping the axles in place. Defects in this system are extremely dangerous.

3. When driving on a long downhill slope, you should brake by:

Only using the brakes.

Mostly using the brakes and occasionally downshifting.

Downshifting and then using the brakes.

When approaching a long downgrade, you should shift into a lower gear then use proper braking techniques. Using the brakes alone could cause them to overheat and fail. The braking power of the engine, which is maximized by being in a lower gear, will be the principal way of controlling your speed on a downgrade.

4. If there is a cargo fire in a box trailer:

The trailer doors should be opened.

The trailer doors should not be opened.

A large, heavy blanket should be put over the trailer.

The doors of a trailer should be not be opened in the event of a cargo fire, especially if the cargo includes hazardous materials. Opening trailer doors would increase the fire's oxygen supply, potentially causing the fire to increase in size.

5. When taking the on-road driving skills test:

You do not have to take the test with the type of vehicle for which you want to be licensed.

You must take the test with the type of vehicle for which you want to be licensed.

It does not matter which type of vehicle you use to take the test.

CDL skills tests, including the on-road test, must be taken with the type of vehicle for which you want to be licensed.

6. If approaching a railroad crossing that is being approached by a train, you should:

Try to cross the tracks quickly.

Drive around any lowered gates.

Stop and wait for the train to pass before beginning across the tracks.

Never attempt to beat a train to a railroad crossing. It is very difficult to accurately judge the speed of an approaching train. If you come upon a crossing that is being approached by a train, you must stop and wait for the train to pass before you attempt to cross the tracks.