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While testing your air brakes.
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If your vehicle begins to skid.
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When inspecting a coupling.
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Michigan CDL Permit Test - Double
(From the 2021 Michigan CDL driver handbook)
| 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.
Passing grade —
4 or fewer errors
advertising
1.
Look into the back of the fifth wheel:
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.
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|
The trailer will not have brakes.
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|
The trailer will speed up.
|
3.
What does the vehicle inspection report do?
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Inform the motor carrier about problems that may need fixing
|
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Ensure that the vehicle is inspected regularly
|
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Keep people accountable for inspecting the vehicle
|
4.
A Class 1 hazardous material is:
|
An explosive.
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Liquid.
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Corrosive.
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5.
As part of the vehicle inspection test, you will be asked to:
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Explain why you must check the items you are checking.
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Change the coolant.
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Replace a headlight.
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6.
Do not base your decision to shift gears on:
|
The speed of your engine (rpm).
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The speed of the road (mph).
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The actions of the vehicle next to you.
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7.
Routine vehicle inspections should be done to ensure:
|
Safety.
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|
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Good gas mileage.
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Comfort.
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