机电英语试卷.doc

注意事项:闭卷
班级________姓名__________学号_________
密封线
1. 本试题全部为笔答题,共4页,满分100分,考试时间90分钟。
2. 答卷前将密封线内的项目填写清楚,密封线内禁止答题。
3. 用钢笔或圆珠笔直接答答题纸上。
题号
一
二
三
四
五
总分
分数
Part I Matching
Directions: This part is to test your ability to know words. (10, 1*10)
1. 二极管 A triode
2. 接触器 B transformer
3. 开关 C switch
4. 变压器 D contactor
5. 三级管 E diode
6. 电流表 F hardness
7. 从动件 G generator
8. 电动机 H motor
9. 发电机 I follower
10. 硬度 J ammeter
Part Ⅱ Multiple Choice
Directions: This part is to test your ability to use words. (10, 1*10)
11. If the carbon content is lower than %, it is called _______.
A. low-carbon steel B. medium-carbon steel
C. high-carbon steel D. alloy steel
12. Heat treatment is the operation of heating and ____ a metal to change its properties.
A. warm B. cold C. cooling D. warming
13. Tapered thrust bearing can bear large radial load and ____ load.
A. large B. small C. medium D. thrust.
14. A cam is a ponent that is used to transmit motion to ____.
A. element B. follower C. frame D. plane
15. Conductor’s impediment to current is called the ____ of the conductor.
A. capacitor B. resistance C. capacitance D. inductance
16. Spring can change mechanical energy into ________ energy.
A. electric B. deformation C. solar D. nuclear
17. The current whose size and direction don’t change over time is ____.
A. DC B. alternating C. AC D. direct
18. ___