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Nebraska CDL Permit Test - Double

Number of questions: 20
Passing score: 16
Directions: This endorsement is required if the driver will pull two or three trailers. To receive this endorsement, applicants must pass a test. The test consists of 20 multiple choice questions. To pass, the applicant must answer at least 16 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: Driving Safely, Air Brakes (if applicable), Combination Vehicles and Doubles and Triples. The Double/Triple endorsement can be used with the Class A CDL.
You have made error so far
Passing grade —
4 or fewer errors
When inspecting the trailers in double and triple combinations:
A driver should walk around the trailers.
A driver should remain in the cab.
A driver should use their mirrors.
A driver should board each trailer.
Spring brakes come on:
When too much air pressure is lost.
When a control on the dashboard is activated.
When the tires have minimal tread depth.
When the brakes are noisy.
If coolant has to be added to a system without a recovery tank, you should:
Keep the vehicle running while adding coolant.
Open the radiator cap quickly.
Not use gloves to touch the radiator cap.
Wait for the engine to cool before adding coolant.
Regrooved tires are:
Allowed only on the front of a bus.
Allowed only on the rear of a bus.
Not allowed anywhere on a bus.
To stop a vehicle using air brakes:
The brake pedal should be depressed.
The brake pedal should be lifted.
The brake knob should be pulled out.
The brake knob should be pushed in.
Which of the following groups of people is not covered by move over laws?
Law enforcement personnel
Fire personnel
People walking alongside the road
When attaching more than one semi-trailer to your tractor, you should place:
The lightest semi-trailer at the very end of the combination.
The heaviest semi-trailer at the very end of the combination.
Any trailer in any position in the combination.
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