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The air brakes should be used.
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The vehicle should be placed in a low gear and the driver should use engine braking.
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The driver should continually downshift instead of using the brakes.
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Idaho CDL Permit Test - Air Brakes
(From the 2020 Idaho CDL driver handbook)
| Number of questions: | 25 |
| Passing score: | 20 |
Directions:
This endorsement is required for driving a vehicle with air brakes. To receive this endorsement, applicants must pass a written test. The test consists of 25 multiple choice questions. Each question has three answer choices. To pass, the applicant must answer at least 20 questions correctly. Test questions come from the Idaho Commercial Driver’s License Manual l. Questions come from the chapter covering: Air Brakes. The Air Brakes endorsement may be used with the Class A, B or C CDL.
Passing grade —
5 or fewer errors
advertising
1.
When traveling down a steep downgrade:
2.
The ____ are activated by an electric switch that is triggered by the brake pedal.
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Headlights
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Turn signals
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Brake lights
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3.
Why do large vehicles use air brakes?
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Other brake systems squeak too loudly.
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Air brakes are very effective systems.
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Other braking systems are hard to come by.
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4.
You should ____ if the low pressure warning signal activates while you are driving.
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Stop where you are and park
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Exit the roadway as soon as safely possible
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Continue driving normally
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5.
Emergency brakes:
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Are not required on vehicles with air brakes.
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Are required only on buses.
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Are required on all vehicles.
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6.
Air tank drains should:
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Not be used by the driver.
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Only be used when it is wet outside.
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Be used to drain the tanks completely.
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