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


After the trailer has been coupled to the tractor. the tractor protection control valve should be placed in what position?

  1. Up
  2. Down
  3. Left
  4. Normal - 正确答案

将卡车车头连接到卡车拖车之后。 卡车车头的保护控制阀应置于正常位置。

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. Watching your mirrors to see if the trailer lights come on
  3. None of these answers are correct
  4. Lifting the brake pedal

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。

When driving a set of doubles. it is necessary to close which shut-off valve in the last trailer

  1. Middle section
  2. None of these answer are correct
  3. Front
  4. Back - 正确答案

当你要驾驶一辆拉着双拖斗的卡车,在行驶前,必须确定关闭最后一个拖斗中的后向截止阀。

You have coupled with a semitrailer. Where should you put the iron trailer supports before driving away

  1. Raised 1/2 way with the crank handle secured in its bracket
  2. Fully raised with the crank handle secured in its bracket - 正确答案
  3. 3 turns off the top with the crank handle secured in its bracket
  4. Raised 1/4 way with the crank handle secured in its bracket

当车头已经与拖斗连接上,准备开车离开之前,应完全的将拖车支架收起,并将曲柄固定在支架上的收放处。

Why should you lock the tractor glad hands to each other ( or dummy couplers ) when you are not towing a trailer

  1. They will be leaking air
  2. Tractor's emergency brake control knob will come on
  3. It will keep dirt and water out of the lines - 正确答案
  4. The connected brake circuit becomes a back up air tank

不拖曳拖斗时,应将卡车后方的刹车气管相互锁定(或锁定在虚拟耦合器上), 以防止污垢或水进入刹车气管中。

商业车驾照拖挂组合理论模拟考试