CDL PRACTICE TEST (SC) - GENERAL KNOWLEDGE TEST
21.
when you apply the service brake at 5 mph, which of the following might indicate a problem?
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The vehicle stops when the brake is applied.
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The vehicle pulls to one side or the other.
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The tongue/draw-bar is not bent.
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All the other answers are correct.
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22.
An alcohol evaporator is important during:
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windy weather.
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dry weather.
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cold weather.
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hot weather.
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23.
Which of the following statements about overhead clearance is true?
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You should assume the heights posted at bridges and overpasses are correct.
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If the road causes your vehicle to tilt, you should drive a little closer to the side of the road.
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The weight of a cargo van changes its height.
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All of the above.
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24.
Which of the the following statements about fatigued or drowsy driving is true?
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Most people are less alert between 12 pm and 3 pm.
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Fatigued drivers may be slower in making critical decisions.
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Fatigued drivers are usually more alert because they are aware risk of being involved in an accident is higher.
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All of the above.
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25.
Which of the following statements about brake shoes is true?
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brakes can fade or fail from excessive heat caused by relying too much on the engine braking effect.
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Brake drums must have cracks longer than half the width of the friction area.
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Brake shoes should be thinner than ¼ inch.
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None of the above.
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26.
Serious traffic violations include:
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erratic lane changes.
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excessive speeding.
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driving a CMV without obtaining a CDL.
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All of the above.
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27.
Federal, state, and local regulations for commercial vehicles:
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only apply to CMV's operated in interstate commerce.
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only apply to US residents.
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vary from place to place.
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do not apply to CMV's operated in intrastate commerce.
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28.
After starting the engine, oil pressure should rise to a normal level:
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within 6 minutes.
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within 2 minutes.
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within seconds.
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within 3 miles.
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29.
Which of the following is a common cause of fire?
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Short circuits due to loose connections.
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Under-inflated tires and duals that touch.
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Improperly sealed cargo.
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All of the above.
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30.
What is countersteering?
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Driving too fast for conditions.
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Staying off the brake while steering to the right to avoid an accident.
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Locking your wheels while turning in an emergency situation.
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Turning the steering wheel quickly the other way after steering in an emergency situation.
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