AIR BRAKES CDL PRACTICE TEST - NORTH DAKOTA
21.
To test the service brake:
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push the brake pedal firmly while going about 5 mph.
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shift your transmission to a low gear, pump the brake pedal three times, then hold it down for five seconds.
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push the brake pedal firmly while slowly moving backward.
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gently try to pull forward with the trailer parking brake on, then release the brake.
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22.
When backing a trailer, you should:
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turn the steering wheel in the direction you want to go.
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never make pull-ups to reposition your vehicle.
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try to position your vehicle so you can back in a straight line.
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avoid correcting the drift.
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23.
How do you test hydraulic brakes for leaks?
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Pump the brake pedal three times, then apply firm pressure to the pedal and hold for five seconds. The pedal should not move.
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Pump the brake pedal ten times and see if it holds.
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Pull forward against parking brake to make sure the hydraulic brakes holds.
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None of the above.
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24.
The air storage tanks:
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are used to hold compressed air.
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protects the tank and the rest of the system from too much pressure.
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stop the compressor from pumping air.
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are connected to the engine through gears or a v-belt.
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25.
The emergency brake system:
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uses the parking brake to stop the vehicle in the event of a brake system failure.
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uses the service brake to stop the vehicle in the event of a parking brake system failure.
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uses parts of the service and parking brake systems to stop the vehicle in the event of a brake system failure.
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None of the above.
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