下载APP
【单选题】
韶山6B型电力机车电机大齿轮齿圈所用材质为（）。
A.
20CrMnMoA
B.
15CrNi6
C.
ZG230-450
D.
35CrMoA
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Passage 3 Questions 11 to 15 are based on the following passage: Scientists in India have invented a new way to produce electricity. Their invention does not get its power from oil, coal or other fuel...
A.
Because bullocks have long been used by Indian people
B.
Because bullocks walk slowly and are easy to control.
C.
Because there are few non-working bullocks in India
D.
Because there is not enough oil in India.
相关题目：
【单选题】Passage 3 Questions 11 to 15 are based on the following passage: Scientists in India have invented a new way to produce electricity. Their invention does not get its power from oil, coal or other fuel...
A.
Because bullocks have long been used by Indian people
B.
Because bullocks walk slowly and are easy to control.
C.
Because there are few non-working bullocks in India
D.
Because there is not enough oil in India.
【单选题】齿轮的润滑主要靠（）
A.
边界油膜
B.
刚性油膜
C.
弹性油膜
【判断题】为了便于装配，通常取小齿轮的宽度比大齿轮的宽度宽5mm～10mm。
A.
正确
B.
错误
【单选题】当齿数一定时，齿轮的模数越大，齿轮各部分的尺寸______。
A.
越小
B.
不变
C.
越大
D.
有的变大有的变小
【判断题】大齿轮带动小齿轮转动是属于减速运动。()
A.
正确
B.
错误
【多选题】开式齿轮的主要失效形式是__。
A.
轮齿折断
B.
齿面磨损
C.
齿面胶合
D.
齿面点蚀
【单选题】若主动齿轮是小齿轮，从动齿轮是大齿轮，则输出的转速（），转矩（）.
A.
降低 减小
B.
升高 增大
C.
降低 增大
D.
升高 减小
【判断题】飞轮的损伤主要是齿圈的损伤。（ ）
A.
正确
B.
错误
【单选题】齿轮的渐开线形状取决于它的（）直径。
A.
齿顶圆
B.
分度圆
C.
基圆
D.
齿根圆
【判断题】自动变速器中的齿轮都是行星齿轮。()
A.
正确
B.
错误
【判断题】齿距越大,轮齿越大,齿轮能承受的载荷就越大。
A.
正确
B.
错误
【单选题】只要（）的齿轮就能互相啮合。
A.
齿数和模数相同
B.
模数和压力角相同
【单选题】韶山6B型电力机车电机大齿轮齿圈所用材质为（）。
A.
20CrMnMoA
B.
15CrNi6
C.
ZG230-450
D.
35CrMoA