NJ CDL AIR BRAKES PRACTICE TEST
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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 New Jersey CDL knowledge test. The NJ 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 New Jersey CDL Manual. Take this NJ CDL practice test now to prepare for the actual air brakes test!
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1.
The trailer hand valve should:
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be used in driving.
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never be used for parking.
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never be used to test the trailer brakes.
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All of the above.
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2.
In vehicles with air brakes, water and compressor oil in the bottom of the air tank:
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should not be removed.
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should be added regularly.
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should be drained completely.
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None of the above.
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3.
If you're feeling tired while driving you should:
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stop driving and get some rest.
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drink coffee.
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increase your speed to get to your destination quicker.
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eat something.
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4.
ABS:
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makes it easier to turn.
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makes it easier to break.
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allows the wheels to lock up.
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helps you avoid wheel lock up.
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5.
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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1/4
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1/2
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9/10
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3/5
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6.
Which of the following statements is true?
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Carrying a properly charged and rated fire extinguisher will help prevent fires.
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Poor cargo ventilation is a common cause of fire.
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Under-inflated tires will NOT cause a vehicle fire.
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There is no way that short circuits due to damaged insulation can cause a vehicle fire.
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7.
By pushing the trailer air supply control knob in, you:
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keeps air in the tractor or truck brake system.
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shut the air off and put on the trailer emergency brakes.
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supply the tires with air.
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supply the trailer with air.
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8.
The total stopping distance for vehicles with air brake systems is made up of __ different factors.
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4
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5
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2
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3
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9.
During a trip you should check:
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temperature gauges.
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pressure gauges.
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mirrors.
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All of the above.
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10.
The air compressor is connected to:
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the radiator.
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the transmission.
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the suspension system.
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the engine.
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NJ CDL Air Brakes Test
| Number of questions: | 25 |
| Correct answers to pass: | 20 |
| Passing score: | 80% |
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