CDL PRACTICE TEST - GENERAL KNOWLEDGE (MISSISSIPPI)
31.
When your drive wheels have poor traction, you should:
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only use the retarder on the rear wheels.
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turn the retarder on.
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only use the retarder on the front wheels.
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turn the retarder off.
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32.
When driving in foggy conditions you should:
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speed up.
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drive on the shoulder.
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slow down.
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flash your brake lights.
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33.
If you double your speed, your braking distance will be:
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2 times longer.
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4 times longer.
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8 times longer.
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3 times longer.
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34.
Which of these is NOT something you should check during the pre-trip inspection of the engine compartment?
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Coolant level in radiator
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Worn electrical wiring insulation
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Engine oil level
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Brake controls
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35.
Convex mirrors:
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make objects appear larger than they really are.
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show a wider area than flat mirrors.
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make things appear closer than they really are.
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All of the above.
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36.
Vehicles must be equipped with emergency equipment, including:
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spare electrical fuses.
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a safety valve.
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horn.
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2 battery-operated flashlights.
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37.
When driving on wet roads, you should reduce your speed by about:
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one-third.
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one-fifth.
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one-quarter.
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one-half.
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38.
Which of the following statements about over-the-counter drugs is true?
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They can be used while on duty, as long as you drink coffee to stay awake.
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They are not considered drugs.
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They are perfectly safe and legal.
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They may affect safe driving ability.
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39.
To prevent drowsiness before a trip, you should:
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drink 2 cups of coffee.
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drive with the windows rolled down.
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avoid medications that cause drowsiness.
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avoid driving with a passenger.
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40.
Most heavy duty vehicles use ___ air brake systems for safety.
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single
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triple
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dual
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reduced
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