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North Dakota 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 four possible answer choices. Test questions come from the North Dakota Commercial Driver Guide. Questions come from chapters covering: Driving Safely, Transporting Cargo 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

Belts in the engine compartment should be:

Easy to slide off.

When driving down a steep grade:

You should ride your brakes all the way down.
Shift into a higher gear as a way to slow down your vehicle.
Shift into lower gears as a way to slow down your vehicle.
The truck should be put in neutral as a way to slow down your vehicle.

What is the Gross Vehicle Weight Rating (GVWR)?

The maximum permitted total weight of a vehicle and its cargo
The minimum permitted weight of a trailer
The maximum permitted weight of a trailer and its contents
The maximum permitted weight of only a tractor

The emergency air line:

Is controlled by the foot brake.
Is connected to the relay valves.
Supplies air to the trailer air tanks.
Prevents skids.

Too little weight on a steering axle can result in:

Poor traction.
Increased visibility.
Longer stopping distances.
Improved gas mileage.

A vehicle stopped at a green light may indicate that the driver:

Is impaired.
Is colorblind.
Does not know the rules of the road.
Is very patient.

What can happen if parking brakes are used in very wet weather with temperatures below freezing?

The brakes will squeak.
The brakes may freeze so the vehicle cannot move.
The brakes may suddenly release by themselves.
The brakes may become too smooth to be used.
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