HI 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 Hawaii CDL knowledge test. The HI 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 Hawaii CDL Manual. Take this HI CDL practice test now to prepare for the actual air brakes test!
1.
You are driving on a steep downgrade. If your safe speed is 35 mph, you should apply the brakes when your speed reaches:
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25 mph
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35 mph
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30 mph
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2.
When the air pressure is built up to governor cutoff, the air leakage rate for combination vehicles with the engine off and the foot brake fully applied should be less than_____ in one minute.
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4 psi
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2 psi
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3 psi
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3.
Brake drums or discs must not have cracks longer than ____ the width of the friction area.
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1/2
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1/4
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1/3
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4.
To check the slack adjusters:
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Park on level ground and chock the wheels, release the parking brakes and pull hard on each slack adjuster. The slack adjuster shouldn't move more than one inch.
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park downhill and see if the vehicle rolls.
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check the air hoses connected to the brake chambers to make sure they aren't cut or worn.
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5.
While driving, you should use your mirrors to:
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check where the rear of your vehicle is while you make turns.
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know where other vehicles are around you.
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All of the above.
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