CALIFORNIA CDL AIR BRAKES PRACTICE TEST
16.
ABS:
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is an addition to your normal brakes.
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should only be used on dry roads.
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allows you to brake harder.
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17.
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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2 psi for single vehicles and 5 psi for a combination of 2 vehicles.
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3 psi for single vehicles and 4 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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18.
Brake lag is:
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the time required for the air brakes to work after the brake pedal is pushed.
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the amount of air pressure required to stop the vehicle.
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the distance your vehicle will travel, in ideal conditions, while you are braking.
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19.
Before starting down a hill, you should:
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look for an escape route.
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slow down and shift to a lower gear.
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release the accelerator and shift to Neutral at the same time.
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20.
The trailer hand valve should:
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never be used to test the trailer brakes.
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be used in driving.
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never be used for parking.
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