AIR BRAKES PRACTICE TEST - LOUISIANA
16.
If your ABS is not working:
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you still have normal brake functions, and should drive and brake as you always have.
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you should immediately bring your vehicle to a complete stop.
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it will slow your truck to a halt and force you to pull over.
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the drive wheels will begin to spin, and you should take your foot off the accelerator.
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17.
By pushing the trailer air supply control knob in, you:
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shut the air off and put on the trailer emergency brakes.
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keeps air in the tractor or truck brake system.
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supply the trailer with air.
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supply the tires with air.
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18.
The use of brakes on a steep downgrade is:
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much more effective than the engine braking effect.
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dangerous, and should be avoided at all costs.
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a supplement to the braking effect of the engine.
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the main braking factor.
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19.
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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20.
To check the slack adjusters:
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park downhill and see if the vehicle rolls.
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check the air hoses connected to the brake chambers to make sure they aren't cut or worn.
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Park on level ground and chock the wheels, release the parking brakes and pull hard on each slack adjuster. The slack adjuster shouldn't move more than one inch.
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None of the above.
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