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.. 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. To pass, applicants must answer 40 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: 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
Passing Score

1. You should specifically look out for black ice:

Explanation
Black ice is a thin layer of ice that is clear enough for the road surface to be seen through it. Be alert to black ice any time the temperature is below freezing and the road surface looks wet.

2. A low air pressure warning signal:

Explanation
Any vehicle with air brakes must be equipped with a low air pressure warning signal.

3. When completing an offset back/right parking maneuver, you should:

Explanation
If you are asked to complete an offset back/right parking maneuver, you should first pull straight forward, then back up to the right. Your vehicle must be parked completely within the boundaries of the parking space.

4. If you see taillights ahead while you are driving in fog:

Explanation
When driving under foggy conditions, lights cannot be taken as a reliable indication of where the road is. The lights may be coming from a vehicle that has pulled off the road.

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

Explanation
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.

6. If convicted of a traffic violation in your personal car:

Explanation
If you are convicted of any traffic violations while driving any vehicle, you must notify your employer within 30 days of the conviction. This rule excludes parking violations.

7. Dry bulk tanks:

Explanation
Driving with dry bulk tanks requires special care because they usually have high centers of gravity. It is also important for drivers to be prepared for the contents to shift in transit.
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