DC CDL HAZMAT PRACTICE TEST
21.
Empty trucks have the best braking. True or False?
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False.
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It depends on the cargo.
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It depends on the truck.
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True.
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22.
Placards identifying hazardous materials must be placed:
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on the outside of the vehicle.
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inside the trailer.
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inside the cab.
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All of the above.
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23.
A hazard class name or ID number may not be used to describe:
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a non-hazardous substance.
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a reportable quantity of a hazardous material.
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hazardous waste.
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None of the above.
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24.
The hazardous materials identification number must appear on the shipping paper, on the package and:
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on the license plate.
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on cargo tanks and other bulk packaging.
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on the steering wheel.
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on the back of the truck.
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25.
Move-over laws require drivers to _________ when approaching an emergency vehicle stopped on the roadside or a work zone.
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change direction
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slow down and change lanes
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sound their horn
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stop
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26.
If your vehicle thumps or vibrates heavily, it may be a sign that:
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one of the tires has gone flat.
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the engine belt is loose.
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the brakes have failed.
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you need to shift up.
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27.
Passive railroad crossings:
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do not have traffic control devices.
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usually have a person directing traffic.
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have at least one traffic control device.
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should never be crossed using a CMV.
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28.
If you get stuck on railroad tracks, you should:
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stay in the vehicle and call for help.
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check the engine compartment quickly.
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get out of the vehicle and away from the tracks.
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have a helper push your vehicle.
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29.
To know how much space you should keep in front of you:
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wait until the vehicle ahead of you passes a clear landmark, then count off the seconds until you reach the same spot.
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estimate how many vehicle lengths there are between you and the vehicle ahead.
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estimate how many seconds it would take you to reach the vehicle ahead.
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None of the above.
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30.
A vehicle contains 500 pounds each of explosives A and B. Federal rules require placarding with:
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Explosive A placards.
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Explosives B placards.
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"Dangerous" placards.
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None of the above.
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