In Partnership with Doug Truscott Driving School
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The air brakes endorsement applies to applicants who wish to drive a vehicle with air brakes in Class A, B, or C CDL. To drive a vehicle with air brakes, you must pass the air brake component of the Pennsylvania CDL knowledge test. The PA CDL air brakes test consists of 25 questions, and you'll need at least 20 correct answers to pass (80%). The test covers the information found in the air brakes section of the Pennsylvania CDL Manual. Take this PA CDL practice test now to prepare for the actual air brakes test!
1.
The use of air brakes on a steep downgrade is only a supplement to:
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the use of the parking brakes.
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the use of the spring brakes.
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the braking effect of the engine.
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the use of the "controlled braking" method.
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2.
Before driving a truck or bus with a dual air brake system, the minimum pressure in both the primary and secondary
systems should be at least:
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130 psi.
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50 psi.
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100 psi.
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75 psi.
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3.
If you must stop on a one-way or divided highway, you should place warning devices _______ toward the approaching traffic.
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10, 100 and 200 feet
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3, 15 and 45 feet
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5, 25 and 50 feet
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5, 50 and 500 feet
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4.
It is not safe to drive a vehicle that has brake drums with cracks that are longer than ___ the width of the friction area.
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3/5
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9/10
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1/2
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1/4
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5.
Weight that is loaded so there is a high center of gravity:
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causes greater chance of rollover.
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makes a vehicle easier to handle.
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reduces the chance that the load will shift to the side or fall off.
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All of the above.
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