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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. The tractor protection valve:
will close automatically if the air pressure drops to a certain level.
provides the air supply for the brake system.
All of the above.
2. In a dual-air system - with engine at operating RPM, the pressure should build from 85 to 100 psi within how many seconds?
3. The space under a heavily loaded vehicle can be very small. This can cause problems:
on dirt roads.
when crossing railroad tracks.
All of the above.
4. When driving in hot weather, drivers should inspect tires:
every 3 hours or every 75 miles.
every 4 hours or every 200 miles.
every 2 hours or every 100 miles.
5. The safety relief valve is located:
in the first tank the air compressor pumps air to.
in the front brake.
on each end of the vehicle's axles.
6. Front-end header boards:
protect drivers from spilled cargo.
protect drivers from cargo in case of an accident or emergency stop.
should never be used.
7. To test the low pressure warning signal, you should:
check the air hoses connected to the brake chambers to make sure they aren't cut.
shut the engine off when you have enough air pressure, turn the electrical power on and step on and off the brake pedal until the low air pressure warning signal comes on.
pump the brakes while your vehicle is running.
8. When backing, you should:
only use mirror on the driver's side.
use the mirrors on both sides.
back quickly.
9. Empty trucks have the best braking. True or False?
It depends on the cargo.
10. Your vehicle has air brakes. To stop, you should:
pull the parking brake control knob out.
release the accelerator, push in the clutch, and shift to Neutral at the same time.
push the brake pedal down.
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HI CDL Air Brakes Test

Number of questions: 25
Correct answers to pass:20
Passing score:80%
Number of questions: 25
Correct answers to pass:20
Passing score:80%
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