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 or 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 A CDL are: Hazardous materials, Tank, Passenger, HazMat and Tank, Air Brakes and School bus.

Number of Question 50

Passing Score 40

1. When testing a parking brake, the vehicle should:

Not be running.

Be placed in a low gear while the driver attempts to pull forward.

Be inspected by a professional mechanic.

Be driven while the parking brake is applied.

To test a parking brake, you should fasten your safety belt, set the parking brake for the power unit, release the trailer parking brake (if applicable), place the vehicle in low gear, and attempt to pull forward against the parking brake. If the parking brake does not hold while you are attempting to pull forward against it, the brake is faulty and must be fixed.

2. Dual tires should:

Not both be in contact with the road surface.

Not touch one another.

Be different sizes from one another.

When inspecting a vehicle, you should verify that your dual tires do not come into contact with one another, or with any other part of the vehicle.

3. How many air storage tanks are used in an air brake system?

Two tanks

Four tanks

Six tanks

The number varies.

Air storage tanks are used to hold compressed air. The number and size of air tanks in an air brake system varies among vehicles.

4. In bad weather, many drivers:

Like to drive in front of trucks.

Like to be on the side of trucks.

Like to follow trucks.

Like to drive without using their lights.

In bad weather, particularly when visibility is poor, it is common for automobile drivers to follow closely behind trucks. Open up the distance between your vehicle and the vehicle in front of you if you are being followed too closely.

5. An Anti-Lock Braking System (ABS):

Cannot be used with air brakes.

Should be used on dry pavement.

Can assist in maintaining control when braking.

Should only be used if all axles have ABS.

Anti-Lock Braking Systems (ABS) are compatible with air braking systems. ABS helps maintain control of a vehicle and prevents the wheels from locking up during hard braking on slippery surfaces. ABS can still provide benefits even if is present on only one axle.