AIR BRAKES PRACTICE TEST - NORTH DAKOTA
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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 North Dakota CDL knowledge test. The ND 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 North Dakota CDL Manual. Take this ND CDL practice test now to prepare for the actual air brakes test!
1.
Parking brakes are:
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not required on trailers.
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required on all vehicles.
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not required on commercial vehicles with air brakes.
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not required on buses.
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2.
The stop light switch:
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should be used to fend off tailgaters.
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turns on the brake lights when you put on the air brakes.
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warns you when the air supply pressure drops below 55 psi.
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tells you when you need to use your parking brake instead of the service brake.
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3.
If air doesn't flow all the way to the back:
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the trailer will tend to swing around.
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a rollover is more likely.
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your brakes will not work properly.
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your lower fifth wheel may fall off.
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4.
With the air pressure built up to governor cutoff, the maximum leakage rates per minute are ___ psi for single vehicles and ___ psi for a combination of 2 vehicles.
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4; 5
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5; 6
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3; 2
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3; 4
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5.
The one-way check valve:
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keeps air from going out if the air compressor develops a leak.
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supplies air to the trailer air tanks.
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keeps your wheels from locking up when you brake hard.
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keeps the axles in place.
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