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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
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1.
A trolley valve:
Should be used while driving.
Should only be used to test trailer brakes.
Should be used when parking uphill.
2.
Which of the following is not required safety equipment for a commercial motor vehicle?
A fire extinguisher
Spare electrical fuses (unless equipped with circuit breakers)
A siren
3.
When coming to a stop, you should apply the brake pedal by:
Pushing down gradually.
Pushing down quickly.
Pulling up gradually.
4.
When approaching your vehicle as part of your pre-trip inspection, you should look for what as a sign of trouble?
A puddle of oil under the vehicle
Inflated tires
Lug nuts that look tight
5.
What is the best way to stop if your brakes fail while you are driving downhill?
Steer onto an escape ramp.
Let the vehicle slow down on its own.
Let rumble strips slow your vehicle.
6.
Texting while operating a CMV is:
Illegal.
Acceptable on rural roads.
Acceptable for drivers contacting their employers.
7.
In hot weather, spots on the pavement where tar is bleeding:
Are very slippery.
Offer the same amount of traction as the rest of the roadway.
Offer more traction than the rest of the roadway.
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