AIR BRAKES PRACTICE TEST - HAWAII
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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.
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 drained completely.
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should be added regularly.
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2.
How do you check that spring brakes come on automatically?
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Continue to step on and off the brake pedal until the air pressure falls to the manufacturer’s specification.
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On a tractor-trailer combination vehicle, continue to step on and off the brake pedal until the tractor protection valve and the parking brake valve close.
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All of the above.
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3.
What is a dual air brake system?
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2 separate air brake systems: one system for daytime driving, the other system for nighttime driving.
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2 separate air brake systems: one system operates the left brakes, the other system operates the right brakes.
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2 separate air brake systems: one system operates the front brakes, the other system operates the rear brakes.
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4.
When you pull hard on a slack adjuster and it moves more than about _____ where the push rod attaches to it, the slack adjuster probably needs adjustment.
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1/2 inch
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1 inch
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2 inches
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5.
The __________ keeps air from going out if the air compressor develops a leak.
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tractor protection valve
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emergency relay valve
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one-way check valve
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