22. Emergency brakes:
Are only required on trailers.
Are required on tractors.
Are optional.
Are not required on trucks.
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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.
✓
You Passed!
✕
You Failed!
Number of Questions
25
Passing Score
20
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To Pass
0
Correct
0
Incorrect
0
23. If your tractor is equipped with ABS but your trailer is not, the ABS:
Will make jackknifing easier.
Will still improve your steering control.
Will not be effective.
Will allow others to see when you brake.
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24. Most heavy-duty vehicles use:
Single air brake systems.
Triple air brake systems.
Quadruple air brake systems.
Dual air brake systems.
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25. If the low pressure warning light comes on while you are driving:
Braking will only occur if there is enough air in the tanks.
You should continue driving, but turn the emergency flashers on to warn other motorists.
You should continue to drive normally and check the brake system when it is convenient.
You can brake 14 times before the air in the system runs out.
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