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Nebraska CDL Permit Test - Knowledge Test Class A

(From the 2021 Nebraska CDL driver handbook)

Number of questions:	50
Passing score:	40

Directions: 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 two, three or four possible answer choices. Test questions come from the Nebraska 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.

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Passing grade —

10 or fewer errors

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Most heavy-duty vehicles use ____ air brake systems.

Single
Dual
Triple
Quad

Before driving a vehicle with air brakes, you should ensure that the ____ come on automatically when air pressure falls below 45 psi.

Spring brakes
Parking brakes
Air brakes

When going down a steep downhill, your primary source of braking should be:

Engine adjustments/downshifting.
Using the brake.
Using the parking brake.
Using ABS.

A vehicle equipped with an Anti-Lock Braking System (ABS) can be identified by:

A sticker on the control panel.
A yellow lamp on the instrument panel.
The letters "ABS" on the brake pedal.
A metal plate on the inside of the driver’s side door.