MS CDL AIR BRAKES PRACTICE TEST
21.
The emergency brake system:
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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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uses the service brake to stop the vehicle in the event of a parking brake system failure.
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uses the parking brake to stop the vehicle in the event of a brake system failure.
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None of the above.
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22.
To make the brakes work, air brakes use:
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hydraulic air.
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nitrogen.
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compressed air.
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carbon monoxide.
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23.
A passive railroad crossing is one that:
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does not have any type of traffic control device.
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has at least two traffic control devices installed at the crossing to regulate traffic.
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has a traffic control device installed at the crossing to regulate traffic.
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requires you to stop and wait until the traffic control device installed at the crossing tells you to proceed.
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24.
Your vehicle has hydraulic brakes. When you press the brake pedal while driving and the pedal goes to the floor, remember that:
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pumping the brake pedal may generate enough hydraulic pressure to stop the vehicle.
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shifting into neutral may help slow the vehicle.
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the parking brake should never used to slow the vehicle.
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All of the above.
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25.
When driving a 60 foot truck at 35 mph in ideal conditions, you should keep at least _______ of space in front of you.
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5 seconds
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6 seconds
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12 seconds
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4 seconds
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