CDL AIR BRAKES PRACTICE TEST - NORTH DAKOTA
16.
The use of brakes on a steep downgrade is:
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the main braking factor.
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a supplement to the braking effect of the engine.
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dangerous, and should be avoided at all costs.
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much more effective than the engine braking effect.
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17.
On
a tractor-trailer equipped with a trailer brake hand
valve, the hand valve can be used to:
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reduce the chance of the front wheels skidding.
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keep from rolling back.
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hold compressed air.
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prevent movement of cargo.
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18.
If the ABS is not working:
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you still have normal brake functions.
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the vehicle will have no brakes.
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the vehicle will have weak brakes.
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None of the above.
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19.
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 3 days
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several times
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for one day
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for one stop
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20.
The service brake applies and releases:
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the brake when you use the brake pedal during normal driving.
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the brake in an emergency situation.
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the parking brake when you use the parking brake control.
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None of the above.
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