DC CDL PRACTICE TEST - GENERAL KNOWLEDGE
21.
How does ABS help you?
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ABS helps you avoid wheel lock up and maintain control when you brake hard on slippery surfaces.
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ABS replaces your normal brakes and helps you to stop faster.
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ABS always shortens your stopping distance.
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ABS makes stab braking more effective.
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22.
Most heavy trucks with manual transmissions require ____ to change gears.
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double clutching
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single clutching
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triple clutching
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None of the above.
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23.
How should you brake if your vehicle loses ABS?
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Pump the brake repeatedly
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Stay off the Brake
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Brake as you always have.
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Step on and off the brake pedal several times
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24.
Confused drivers can be very hazardous. Clues to confusion include:
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changing direction suddenly.
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stopping in the middle of an intersection.
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driving very slowly.
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All of the above.
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25.
With low beams, drivers can see ahead about:
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15 feet
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250 feet
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100 feet
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150 feet
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26.
The first thing to do at an accident scene is to:
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care for the injured.
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notify authorities.
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keep another accident from happening.
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gather information.
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27.
If you get stuck on the railroad tracks, the first thing you should do is:
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try to move your vehicle until you see the train.
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stay in your vehicle and call 911.
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immediately get out of the cab and move away from the tracks.
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scream for help.
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28.
Which of the following statements about drinking alcohol is true?
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Only time will sober you up.
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Alcohol first affects judgment and self-control, which are necessary for safe driving.
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The BAC measures the amount of alcohol in your body.
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All of the above.
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29.
When backing a trailer, you should:
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avoid using the brakes.
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try to position your vehicle so you can back on a curved path.
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turn the steering wheel in the opposite direction of the turn.
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turn the steering wheel toward the direction you want to go.
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30.
To keep your vehicle from rolling back when you start, you should:
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pump the brakes.
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turn the engine off before you take your foot off the brake.
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apply the emergency brake whenever necessary.
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partly engage the clutch before you take your foot off the brake.
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