CDL PRACTICE TEST - GENERAL KNOWLEDGE (DELAWARE)
21.
When checking your mirrors you should:
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use both mirrors.
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only use the passenger side mirror.
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not make regular checks.
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only use the driver side mirror.
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22.
Black ice is:
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wet ice.
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dirty snow.
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rain and snow mixed.
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a thin layer of ice clear enough that you can see the road underneath it.
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23.
The distance your vehicle travels, in ideal conditions, from the time you see a hazard until your brain recognizes it, is called:
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Stopping distance
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Braking distance
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Perception distance
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Reaction distance
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24.
Fully loaded rigs:
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are less likely to roll over than empty rigs.
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are much more likely to roll over than empty rigs.
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are just as likely to roll over as empty rigs.
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None of the above.
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25.
Brake lag is:
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the distance your vehicle will continue to travel, in ideal conditions, before you hit the brakes.
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the distance your vehicle will travel, in ideal conditions, while you are braking.
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the amount of air pressure required to stop the vehicle.
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the time required for the air brakes to work after the brake pedal is pushed.
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26.
When you discover a fire, if the trailer doors are hot you should not open them because:
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with air many fires do less damage.
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the temperature of the trailer should not be changed in any way.
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you should use the fire extinguisher on the door.
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opening the doors lets air in and may make the fire flare up.
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27.
If you swing wide to the left before turning right:
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another driver may try to pass you on the left.
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another driver may try to pass you on the right.
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you may damage the service brakes.
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None of the above.
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28.
If a tire fails while you are driving, you should:
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brake as hard as possible.
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stop on the roadway if possible.
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call your supervisor for instructions.
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stay off the brake
until your vehicle has slowed down.
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29.
When you push the brake pedal down, air brakes work:
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immediately.
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after about 15 seconds.
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after a short delay.
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only when ABS is working.
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30.
When driving in work zones you should:
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Observe the posted speed limits at all times.
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Drive slowly and carefully.
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Use your four-way flashers or brake lights to warn drivers behind you.
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All of the above.
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