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 pounds To receive this license, applicants must pass a 50-question test. To pass, applicants must answer 40 questions correctly. Each question has three possible answer choices. Test questions come from the Oklahoma Commercial Driver License Manual. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Combination, Doubles and Hazardous Materials. Endorsements that may be used with a Class A CDL are: Hazardous materials, Tank, Passenger, HazMat and Tank, Air Brakes and School bus.

Number of Question 50

Passing Score 40

1. If an aggressive driver is involved in a crash down the road, you should:

Pull over and yell at them.

Stop after the crash scene and report the other driver’s behavior to police.

Block the driver in with your vehicle.

If you observe a crash involving an aggressive driver, you should stop a safe distance from the crash scene, wait for police to arrive, and inform them of the aggressive behavior you witnessed.

2. When pulled off on the side of the road:

A driver should keep the driver’s side door open.

A driver should turn on the emergency flashers.

The driver should wave their arms.

If you must stop on the side of the road, make sure to use your four-way emergency flashers. This is particularly important at night.

3. ____ is an example of required emergency equipment.

A spare electrical fuse

A loud horn

A battery-operated flashlight

All commercial motor vehicles are required to be equipped with the proper emergency equipment. This may include spare electrical fuses; three red reflective triangles, six fuses, or three liquid burning flares; and at least one properly charged and rated fire extinguisher.

4. A poor balance of weight in a trailer:

Can make handling unsafe.

Improves traction.

Increases fuel efficiency.

Poorly balanced weight in a trailer can make handling unsafe. For example, either too little or too much weight on the front axle can make a vehicle difficult to steer. Weight should be distributed evenly from front to back and from side to side. It should be distributed as low as possible.

5. A vehicle that is smaller than your vehicle:

Will usually be able to stop faster than your vehicle.

Will usually take more time to stop than your vehicle.

Will take about the same amount of time to stop as your vehicle.

In general, a smaller vehicle will be able to come to a complete stop faster than a larger vehicle. Keep this in mind when determining your following distance.

6. When starting an engine as part of a pre-trip inspection, the driver should:

Listen for unusual noises.

Place the engine in first gear.

Turn on the heater.

Check your engine during the pre-trip inspection. After starting the engine, you should listen for unusual noises.

7. What is often found in compressed air?

Water

Cardboard

Brake fluid

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.

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