Combination(2) 复合
1. You have pushed in the trailer supply valve. You should not move the tractor until the whole air system is:
( ) Empty
(x) At normal pressure
( ) Between 60 and 80 psi
1. 你已经插入拖箱供给阀门。你不应该移动牵引器直到整个空气系统:
(2)在正常压力值
2. Which statement is true?
( ) The brake and suspension systems of combination vehicles work best with a light load
( ) Light vehicles need more braking power to stop than heavy ones
(x) “Bobtail” tractors can take longer to stop than a combination vehicle load to maximum gross weight
2. 下列哪个称述是正确的?
(3)“缩减”的车头比满载货物的车辆更难停下来
3. To stop a trailer skid you should:
( ) Use the trailer hand brake
(x) Release the brakes
( ) Counter steer
3. 制止拖箱打滑你应该:
(2)放开刹车
4. A tractor with a(n) ______ trailer requires the shortest stopping distance
( ) Empty
( ) Lightly loaded
(x) Fully loaded
4. 一个车头拖着一个( )拖箱需要最短的制动距离
(3)装满的
5. Under good driving conditions, you should leave at least one second od space between your vehicle and the vehicle ahead for every ____feet of your vehicle’s length.
(x) 10
( ) 20
( ) 30
5. 在良好的驾驶情况下,你车长的总长每( )FT就应该增加至少一秒的空间
(1)10
6. In general, the higher your truck’s “center of gravity” the:
( ) Easier it is to turn around corners
( ) More stable it is when turning
(x) Easier it is to turn over
6. 通常情况,货车重心越高:
(3)越容易翻车
7. If you cannot make a turn without entering another traffic lane, you should:
( ) Turn wide before you start your turn
(x) Turn wide as you complete your turn
( ) Not make that turn
7. 如果你转弯一定要借其他的车道:
(2)转大点直到完成转弯
8. You are coupling a tractor to a semi-trailer. You have backed up but are not under it. What should you hook up before backing under the semi-trailer?
(x) The emergency and service air lines
( ) The electrical service cable
( ) Nothing. Back up and lock the fifth wheel
8. 你在钩一辆半拖车但是那个钩子没有到钩口下面。你需要勾住什么在钩子回到下面之前?
(1)紧急和服务空气通道
9. For a coupling to be completed, the safety catch for the fifth wheel locking lever must be:
(x) Over the locking lever
( ) Straight up
( ) Through the locking lever
9. 挂钩完成了,第五轮锁定杠杆的安全钩必须:
(1)超过锁定杠杆
10. Before you back under a track trailer, make sure the:
(x) Trailer brakes are locked
( ) Air supply knob is in
( ) Air brakes are off
10. 在倒车钩拖箱之前,必须确认:
(1)拖箱刹车锁定着
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