CDL GENERAL KNOWLEDGE TEST (IOWA) - PRACTICE TEST
21.
Do NOT use water on a _______ fire.
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paper
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gasoline
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cloth
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22.
When steering to avoid a crash, you should:
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not turn any more than needed to clear what is in your way.
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steer with one hand so that you can turn the wheel more quickly.
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apply the brakes while turning.
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23.
When starting your vehicle, the warning lights and buzzers:
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should stay on until you manually turn them off.
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should go out right away.
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should stay on for 15-20 seconds.
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24.
When driving in fog, drivers should:
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use high beams.
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use the windshield wipers.
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use low beams.
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25.
_________ can make vehicle handling unsafe.
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Poor weight balance
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Poor ventilation
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Dry roads
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26.
The liver can only process ______ of alcohol per hour, much ____ than the alcohol in a standard drink.
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1/3 an ounce; less
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one ounce; less
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1/8 an ounce; more
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27.
If a tire blows out, you should:
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fully apply the brakes while holding the steering wheel firmly.
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keep a firm grip on the steering wheel and stay off the brake until the vehicle has slowed down.
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keep driving until you reach the next service station.
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28.
The emergency equipment must include:
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Charged and rated fire extinguisher.
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Electrical fuses.
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All of the above.
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29.
The height of the vehicle's center of gravity:
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should only be a concern when driving a vehicle.
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is very important for safe handling.
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should only be a concern when loading a vehicle.
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30.
When you discover a fire, if the trailer doors are hot you should not open them because:
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the temperature of the trailer should not be changed in any way.
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with air many fires do less damage.
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opening the doors lets air in and may make the fire flare up.
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