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2025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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The fifth wheel locking lever is not locked after the jaws close around the kingpin. This means that:

  1. The trailer will not swivel on the fifth wheel.
  2. The parking lock is off and you may drive away
  3. The coupling is not right and should be fixed before driving the coupled unit - 正确答案
  4. All these answers are true

如果当卡车车头连接到拖斗后,车头的牵引座锁定杆未关闭,这意味着车头连接拖斗不正确,切勿在此情况未解决前上路。

You are coupling a tractor to a semi-trailer and have backed up but are not under it. What should you hook up before backing under?

  1. None of these answers are correct
  2. The electrical service cable
  3. The emergency and service air lines. - 正确答案
  4. Nothing, Back up and lock the fifth wheel

当你要将车头连接到半挂拖斗,你应该先连接好紧急刹车管线和服务刹车管线,然后再倒到拖斗下方

When you get ready to back under semitrailer you should line up:

  1. Directly in front of the trailer - 正确答案
  2. None of these answer are correct
  3. The kingpin to engage the driver's side locking jaw first
  4. The left rear outer dual wheel with the kingpin

当你准备好将车头倒车连接半挂车时,你应该尽量将车头与挂车直线对其

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 brake lights will come on when the brake pedal is pressed
  3. If the trailer has no spring brakes, you could drive away but you wouldn't have trailer brakes - 正确答案
  4. The hand valve will apply the tractor brakes instead of the trailer brakes

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

The semitrailer made before 1975 that are equipped with the air brakes:

  1. Often do not have spring brakes - 正确答案
  2. Have only a service air line
  3. Usually need a glad hand converter
  4. Have only a emergency air line

1975年之前生产的装有气刹的半挂车通常没有弹簧刹车系统

商业车驾照拖挂组合理论模拟考试