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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.
You have made error so far
Passing grade —
4 or fewer errors
Blocking cargo:
Should never be done.
Should be done to prevent shifting of cargo.
Should only be done with welded material.
Strong winds usually cause the greatest issues for:
Lighter vehicles.
Heavier vehicles.
Flatbed trailers.
Blocking is used to:
Prevent cargo from shifting.
Prevent cargo from being loaded too high.
Prevent cargo from being unloaded too quickly.
When checking power steering hoses during a pre-trip inspection, you should look for:
Secure connections to the battery.
Extra hose pieces available for repairs.
When parking, you should not use the parking brake if:
The brakes are very hot.
The brakes are very cold.
There is snow on the ground.
Headache racks:
Are illegal.
Help protect the driver from the cargo.
Allow for increased cargo space.
When pulled over to the side of the road, you should:
Rely on your taillights to alert other motorists to your presence.
Not worry about other motorists.
Use your four-way emergency flashers to alert other motorists to your presence.
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