CDL AIR BRAKES PRACTICE TEST - TEXAS
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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 Texas CDL knowledge test. The TX 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 Texas CDL Manual. Take this TX CDL practice test now to prepare for the actual air brakes test!
1.
When going down grades, you should:
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put the transmission in Neutral.
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shift up.
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rely solely on engine braking to reduce your speed.
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downshift to a lower gear.
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2.
Under a pressurized system, the radiator cap:
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should be removed when the coolant is hot.
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should always be cool.
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should never be removed until the system has cooled.
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should never be hot.
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3.
If you are driving a 30-foot vehicle at 55 mph, you should leave at least _____ between you and the vehicle ahead.
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3 seconds
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4 seconds
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2 seconds
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5 seconds
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4.
Parking brakes are:
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not required on commercial vehicles with air brakes.
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not required on trailers.
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not required on buses.
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required on all vehicles.
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5.
The application pressure gauge shows:
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how much pressure the relay valves should send to the trailer brakes.
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how much air pressure you are applying to the brakes.
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how much pressure is in the air tanks.
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All of the above.
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