EXERCISE 1  

1. T     2. F     3. F     4. T     5. T     6. F

1. The steering system is usually used to control the direction of a vehicle's mouon.

2. When the driver turns the steering wheel , the pinion gear turns , causing the linkage to mo、rs.

3. We are completely sure that it takes three complete revolutions of the steering wheel lo make the wheels turn from far left to far right on most cars.

4. Recirculating-ball steering is widely used on many trucks and SUVS , which provides a good mechanical advantage for a heavy vehicle.

5. The purpose of seals  ls to prevent the entry of dirt or the loss of lubncant

6. When the steering wheel is turned to the left , the ball bearings circulate i the opposs eltry of dirt or the loss of lubncant. the opposite dtrection .

EXERCISE 2  

1. rack-and-pinion steering   齿轮齿条转向 

2. steering shaft            转向轴  

3. recirculating-ball steering  循环球转向      

4. steering wheel           转向盘

5. inner tie rod end         横拉杆内接头

6. steering arm            转向臂    

7. outer tie rod end         横拉杆外接头   

8. steering gear             转向机

9. mechanical advantage     机械效益       

10. steering system           转向系   

EXERCISE 3    

1. The steering system is one of those having the most significant influence upon      vehicle performance and reliability.

2. The steering gear converts the rotary motion of the steering wheel into straight-line motion.

3. The steering wheel is mounted on the upper end of the steering shaft,

4. The manual steering system consists of steering wheel and column: a manual gearbox, and pitman arm, etc.

5. The balls must roll in the grooves inside the ball nut.

6. As the worm rotates the balls cause the nut to move up and down along the worm

7. The rack-and-pinion steering gear is used mostly on smaller car.

8. The movement is carried through the rods to the steering arms at the front wheels.

EXERCISE 4  

1.steering : a wheel that controls steering, as in a vehicle  

2.worm gear : the toothed wheel of this gear a worm wheel  

3.roller bearing : a bearing to reduce friction between machine parts.

4.steering gear : Dispositions of a vehicle are transferred to the part that interacts with the external medium

5.pinion : a small cogwheel that is engaged by a, rack  

6.linkage : a system of interconnected machine elements , such as rods , springs , and pivots     

EXERCISE 5  

1. Steering system mainly includes steering wheel, steering gears, linkages, and other components（转向盘、转向机、杠杆机构和其他学部仵) .     

2. In the pitman arm system , the movement inside the steering box causes the pitman shaft and arm to rotate(使转向摇臂轴及转向摇臂旋转)

3. The steering linkage is so designed as to prevent side-slip of all automobile wheels in cornering (防止汽车转弯时车轮侧)

4. For the personal safety of the driver and passengers of the car , steering gear plays a important role (转向机起起着重要的作用).

5. Two types of steering system are usually used on cars: manual steering system and power steering system(手动转向系统和动力转向系统).