SC CDL GENERAL KNOWLEDGE TEST - CDL PRACTICE TEST
31.
When you drive a tractor-trailer combination with ABS, you should:
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brake as you always have.
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apply the trailer hand brake whe braking.
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pump the brakes.
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always apply the brakes hard.
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32.
If you cannot see well enough while driving in cold weather, you should:
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stop safely and fix the problem.
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turn your defroster on and slow down until you can see again.
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reduce your speed and make sure
the windshield washer works.
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keep driving and check that the wiper blades press against the window hard enough to wipe the windshield clean.
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33.
Objects that have fallen on the road:
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can be a danger to your tires and wheel rims.
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can be hazards.
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can damage electrical and brake lines.
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All of the above.
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34.
Before each trip, you must make sure:
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the cargo has a high center of gravity.
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your cargo obscures your view to the sides.
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the truck is overloaded.
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the cargo is balanced and secured.
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35.
Traction is:
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friction between the front and rear tires.
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friction between the tires and the road.
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the distance your vehicle will travel while you
are braking.
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the maximum safe weight a tire can carry at a specified pressure.
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36.
The posted speed limit:
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may only be exceeded when driving in rural areas.
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should never be exceeded.
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should only be exceeded when passing other vehicles.
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is only a suggestion.
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37.
Empty trucks:
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have less traction.
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are higher than loaded trucks.
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require greater stopping distances.
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All of the above.
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38.
To prevent fire, you should:
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inspect the electrical, fuel, and exhaust systems.
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inspect tires and cargo.
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check that the fire extinguisher is charged.
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All of the above.
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39.
Combination vehicles usually require _________ single commercial vehicles.
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less driving skill than
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more driving skill than
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the same level of skill as
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None of the above.
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40.
Your safety equipment must include:
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an inter-axle differential lock.
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a properly charged and rated fire extinguisher.
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a dimmer switch.
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spare electrical fuses (only if your vehicle is equipped with circuit breakers).
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