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Michigan 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. Test questions come from the Michigan 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.
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1.
As part of the vehicle inspection test, you will be asked to:
Explain why you must check the items you are checking.
Change the coolant.
Replace a headlight.
2.
Older trailers are not equipped with spring brakes. This means that if the air supply for a vehicle's air braking system leaks away:
The trailer will stop normally.
The trailer will not have brakes.
The trailer will speed up.
3.
Routine vehicle inspections should be done to ensure:
Safety.
Good gas mileage.
Comfort.
4.
A Class 1 hazardous material is:
An explosive.
Liquid.
Corrosive.
5.
Do not base your decision to shift gears on:
The speed of your engine (rpm).
The speed of the road (mph).
The actions of the vehicle next to you.
6.
What does the vehicle inspection report do?
Inform the motor carrier about problems that may need fixing
Ensure that the vehicle is inspected regularly
Keep people accountable for inspecting the vehicle
7.
Look into the back of the fifth wheel:
While testing your air brakes.
If your vehicle begins to skid.
When inspecting a coupling.
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