AIR BRAKES PRACTICE TEST - ALABAMA
6.
The tractor protection valve:
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will close automatically if the air pressure drops to a certain level.
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will close if you apply the parking brakes.
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provides the air supply for the brake system.
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All of the above.
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7.
Your vehicle has a dual air brake system. If one air system is very low on pressure, you should:
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reduce your speed and drive to the nearest garage for repairs.
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bring the vehicle to a safe stop, and have the air brakes system fixed.
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call your dispatcher or supervisor for instructions.
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reduce your speed and check the low air pressure warning signal for the other system regularly.
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8.
With the controlled braking method, you:
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apply the brakes all the way and release brakes when the wheels the lock up.
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push down on the brake pedal as hard as you can so that the wheels the lock up.
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apply the brakes as hard as you can without locking the wheels.
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None of the above.
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9.
Air tanks usually hold enough compressed air to allow the brakes to be used _________ even if the compressor stops working.
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for one stop
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for 3 days
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for one day
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several times
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10.
Before driving a vehicle with a dual air system, the air compressor should build up a minimum of _____ pressure in both the primary and secondary systems.
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50 psi
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75 psi
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100 psi
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10 psi
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