Air Brakes
This endorsement is required for driving a vehicle with air brakes. To receive this endorsement, applicants must pass a test. The test consists of 25 multiple choice questions. Each question has four answer choices. To pass, the applicant must answer at least 20 questions correctly. Test questions come from the Texas Commercial Motor Vehicle Drivers Handbook. Questions come from chapters covering: Air Brakes. The Air Brakes endorsement may be used with the Class A, B or C CDL.
Number of Questions
25
Passing Score
20
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To Pass
0
Correct
0
Incorrect
0
3. A low air pressure warning signal should activate:
When tank pressure falls below 10 psi.
When tank pressure falls below 5 psi.
When tank pressure falls below 120 psi.
When tank pressure falls below 55 psi.
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4. Pressing and releasing a brake pedal unnecessarily can:
Create a loud noise.
Make the brake pedal more sensitive.
Add more air to the braking system.
Release air faster than it can be replaced.
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5. If the spring brakes are on, you should:
Move the steering wheel.
Be especially careful because the brakes may fail.
Not use the brake pedal.
Press the accelerator.
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7. To ensure normal stopping power, drivers of vehicles equipped with a front brake limiting valve should:
Set the control to neutral.
Set the control to the off position.
Set the control to normal.
Keep the control at the halfway mark.
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