VERMONT CDL AIR BRAKES PRACTICE TEST
6.
If the air pressure gets too low:
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the brakes will lock up.
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the brakes will not work.
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ABS will help maintain vehicle control.
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7.
If you get stuck on railroad tracks, you should:
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have a helper push your vehicle.
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get out of the vehicle and away from the tracks.
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stay in the vehicle and call for help.
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8.
Before driving a vehicle with a dual air brake system, you should allow time for the air compressor to build up a minimum of ____ pressure in both the primary and secondary systems.
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50 psi
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100 psi
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150 psi
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9.
An Anti-lock Braking System (ABS):
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lets you drive faster.
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keeps your wheels from locking up when you brake hard.
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increases your normal braking capability.
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10.
To perform an applied leakage test, the vehicle’s air pressure should be built up to maximum pressure. Check the air gauge to see that the air pressure should drop no more than:
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3 psi for single vehicles and 4 psi for a combination of 2 vehicles.
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2 psi for single vehicles and 5 psi for a combination of 2 vehicles.
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1 psi for single vehicles and 3 psi for a combination of 2 vehicles.
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