SC CDL PRACTICE TEST - GENERAL KNOWLEDGE
21.
Retarders:
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increase fuel efficiency.
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improve traction.
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help to increase brake pressure.
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can be noisy and may not be permitted everywhere.
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22.
ABS malfunction lamps are located:
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on the instrument panel.
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on the driver'door.
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under the hood.
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None of the above.
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23.
Water in the brakes:
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can cause the brakes to apply unevenly.
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reduces wheel lockups.
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can increase braking power.
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All of the above.
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24.
In mountain driving, to select a safe speed you should:
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go slightly faster than the speed limit.
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go 5 mph slower than the vehicle ahead.
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follow the vehicle in front of you.
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select a speed that's not too fast for the weight of your vehicle and cargo, the length and steepness of the grade, and road and weather conditions.
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25.
When checking the condition of the steering system, you must:
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Test what happens under braking conditions.
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grab the steering mechanism to test for looseness.
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Visually inspect the steering mechanism.
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Check the windshield wiper arms.
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26.
When backing, as soon as you see the trailer getting off the proper path, you should:
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turn the top of the steering wheel in the opposite direction of the drift.
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to keep a firm grip on the steering wheel and continue backing.
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turn the top of the steering wheel in the direction of the drift.
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None of the above.
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27.
If you must stop on or by a one-way or divided highway, you must place warning devices ___ feet, ___ feet, and ___ feet toward the approaching traffic.
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10; 100; 200
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5; 50; 100
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20; 200; 400
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15; 150; 300
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28.
Your mirrors should be adjusted so that:
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more than half of the mirror shows the vehicle.
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the rear of the vehicle is visible in the mirror.
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a part of the vehicle is visible in the mirror.
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no part of the vehicle is visible in the mirror.
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29.
If your brakes fail on a steep mountain downgrade, you should:
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slow down until your vehicle comes to a complete stop.
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stay on the road and keep looking for the next available escape ramp.
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set the parking brake and park in an open area.
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decide what to do as soon as you know your brakes do not work.
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30.
What three things add up to total stopping distance?
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Reaction distance + viewing distance + braking distance
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Perception distance, reaction distance and braking distance
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Reaction distance + braking distance
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Braking distance + stopping distance
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