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!
拖挂组合理论模拟考试排行榜
The tractor protection valve will close and the trailer emergency brakes will come on when there is a major leak in the __ brake line
- Emergency - 正确答案
- Hydraulic
- Service
- Parking
当紧急刹车管道中发生重大泄漏时,车头的保护阀将关闭,拖斗的紧急刹车将开启
You have coupled with a semitrailer. Where should you put the iron trailer supports before driving away
- Raised 1/4 way with the crank handle secured in its bracket
- Raised 1/2 way with the crank handle secured in its bracket
- Fully raised with the crank handle secured in its bracket - 正确答案
- 3 turns off the top 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。
The fifth wheel locking lever is not locked after the jaws close around the kingpin. This means that:
- All these answers are true
- The parking lock is off and you may drive away
- The coupling is not right and should be fixed before driving the coupled unit - 正确答案
- The trailer will not swivel on the fifth wheel.
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。
To unlock the fifth wheel the locking lever should be placed in the ___ position
- Neutral
- Open - 正确答案
- Closed
- Left
要解锁牵引座(又称第五轮)与挂车脱离,锁定杆应该处于打开位置
The safety catch for the fifth wheel locking lever must be __ for coupling to be complete
- Over the locking lever - 正确答案
- Straight up
- Under the locking lever
- None of these answers are correct
以确保车头与拖斗正常连接,牵引座(第五轮)锁定杆的安全锁必须在锁定杆上方


