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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 Idaho CDL knowledge test. The ID 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 Idaho CDL Manual. Take this ID CDL practice test now to prepare for the actual air brakes test!
1.
When driving at night, you should:
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look directly at the lights of oncoming vehicles.
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drive slowly enough to see obstacles with your headlights.
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put your own high beams on if other drivers don't put their low beams on.
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2.
Passive railroad crossings:
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have at least one traffic control device.
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do not have traffic control devices.
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should never be crossed using a CMV.
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3.
When going down a steep downgrade, you should:
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use the parking brake.
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avoid braking and rely on engine braking.
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use a low gear, and a proper braking technique.
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4.
An alcohol evaporator is important during:
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hot weather.
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dry weather.
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cold weather.
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5.
Which of the following is NOT a way to determine if your trailer is equipped with ABS (antilock braking system)?
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It was built after March 1, 1998.
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The letters "ABS" are printed on the side of the steering wheel.
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It has yellow ABS malfunction lamps.
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