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Idaho 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 three possible answer choices. Test questions come from the Idaho Commercial Driver’s License Manual. 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.
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Passing grade —
4 or fewer errors
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8.
Rolling backward when beginning to accelerate is dangerous because:
The transmission may be damaged.
The truck is not made to go backwards.
You may hit a vehicle behind you.
9.
When a vehicle is started, the coolant temperature should:
Decrease.
Rise slowly.
Hold steady.
10.
If approaching a vehicle with a distracted driver, you should:
Quickly pass the vehicle.
Maintain a safe distance from the vehicle.
Closely follow the vehicle.
11.
When backing up while coupling a trailer, the tractor should be positioned:
Directly in front of the trailer.
Directly next to the trailer.
Parallel with the trailer.
12.
Slow down and be extra careful:
When traveling in normal traffic.
When driving on dry pavement.
When approaching a work zone.
13.
Before a trip, you should make a visual check of a coupling to ensure that:
There is a space between the upper and lower fifth wheel.
The kingpin is free from all dirt and dust.
The locking jaws are closed on the kingpin.
14.
In a dual air brake system:
Air tanks are shared between both systems.
Each system has its own air tanks.
You must designate which system you are using.
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