纽约州，加州以及其它州商业车驾照拖挂组合理论模拟题复习

驾驶拖挂组合车辆可以成为您商业驾驶生涯中不可或缺的一部分。 不过，在达到这一点之前，您需要通过美国DMV的考试，证明您已经掌握了安全驾驶这些车辆所需的专业知识。 以下30个问题来自官方2026年美国商业车驾照手册，仅涵盖拖挂组合车辆，以帮助您准备此特定的DMV测试。 祝你在练习考试和真正考试的时候好运！

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免费在线商业车驾照拖挂组合理论模拟考试

If the service line comes apart while you are driving a combination vehicle but the emergency line stays together, What will happen right away?

  1. Nothing is likely to happen until you try to apply the brakes - 正确答案
  2. None of these answers are correct
  3. The trailer's tank will exhaust through the open line
  4. The emergency trailer brakes will come on

如果您在驾驶一部组合卡车时服务刹车管道脱落，但紧急刹车管道还保持在一起，那么除非你尝试踩刹车，否则一般情况下什么都不会发生

You have a major leak in the service line and you put on the brakes. Service air will escape and cause the:

  1. Tractor spring brake to lock up
  2. Trailer emergency brakes to come on - 正确答案
  3. Trailer tank pressure to be lost
  4. None of these answer are correct

当你踩刹车时，卡车的服务刹车系统出现严重的漏气，这时服务刹车系统的气将逸出并导致挂车的紧急刹车系统开启 ( 紧急刹车按钮会弹出 )

What will happen if the air lines are crossed when you hook up to an old trailer

  1. none of these answers are correct
  2. The hand valve will apply the tractor brakes instead of the trailer brakes
  3. The brake lights will come on when the brake pedal is pressed
  4. If the trailer has no spring brakes, you could drive away but you wouldn't have trailer brakes - 正确答案

连接旧的拖斗时，如果服务刹车气管与拖斗刹车气管弄混了。 如果拖斗没有弹簧刹车器，你可以开车离开，但拖斗将没有刹车

After you supply air to the trailer. make sure the air lines are not crossed and the trailer brakes are working. This is done by:

  1. Applying and releasing the trailer brakes and listening for the sound of the brake - 正确答案
  2. Lifting the brake pedal
  3. None of these answers are correct
  4. Watching your mirrors to see if the trailer lights come on

向拖斗供气后，为确保服务刹车管和拖斗刹车管没有弄混了，且拖车刹车正在工作，可以通过踩放刹车然后听拖斗刹车的声音。

There are two things that a driver can do to prevent a rollover. They are: (1) keep the cargo as close to the ground as possible, and (2):

  1. none of these answers are correct
  2. Go slow around turns - 正确答案
  3. Keep both hands firmly on the steering wheel
  4. Make sure that the brakes are properly adjusted

驾驶员可以做两件事来防止拖斗在行驶途中翻了。 它们是：（1）保持货物尽可能靠近地面，（2）转弯时要慢一些

商业车驾照拖挂组合理论模拟考试