NEBRASKA CDL PRACTICE TEST - GENERAL KNOWLEDGE
21.
When you use mirrors while driving on the road, you should:
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check quickly.
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only use one mirror.
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never look back and forth between the mirrors and the road ahead.
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focus on the mirrors for a long time.
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22.
Strong winds can make it difficult to stay in your lane, especially when:
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driving at speeds below 40 mph.
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driving alongside other vehicles.
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going into tunnels.
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coming out of tunnels.
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23.
If your truck has automatic transmission, you should downshift:
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when going down grades.
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when you need to accelerate.
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whenever road conditions allow.
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after entering a curve.
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24.
When using a fire extinguisher, you should:
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Aim at the flames.
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Keep as close to the fire as possible.
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Aim at the base of the fire.
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All of the above.
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25.
Skids caused by acceleration can usually be stopped by:
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taking your foot off the accelerator.
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swerving to the left.
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applying the brakes firmly.
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swerving to the right.
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26.
When the road is very slippery, you should:
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apply the brakes often to keep the linings dry.
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use the parking brake instead of the service brake.
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stop at the first safe place.
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downshift to stop.
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27.
The amount of liquid to load into a tank depends on:
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the amount the liquid will expand in transit.
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legal weight limits.
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the weight of the liquid.
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All of the above.
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28.
Which of the following could cause poisonous carbon monoxide to enter the cab?
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Lack of engine oil
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Exhaust system leaks
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Wrong type of fuel
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Lack of engine coolant
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29.
If your vehicle is equipped with a retarder, you should turn it off:
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when you are running late.
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when you are driving in heavy traffic.
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when you need to accelerate suddenly.
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whenever the road is wet, icy, or snow covered.
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30.
Which of the following statements about slippery roads is true?
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The road will freeze before bridges will.
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On a wet road you should reduce speed by a half or more.
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Shady parts of the road provide better traction than open areas.
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None of the above.
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