问题 问答题 论述题

试述对机车车钩的技术要求。答:机车段修时,车钩组装后应达到下列要求:

答案

参考答案:

(1)车钩开、闭状态良好,作用灵活。

(2)测量车钩的开度(从最小处测量):满开位为220~245mm锁闭位为110~127mm。(3)车钩锁闭位时,钩舌在推拉状态下,钩舌销能取出和安装。

(4)车钩高度应为845~880mm。

(5)钩舌与钩锁铁的侧面间隙为1~3mm(允许堆焊)。

(6)钩锁铁与钩舌接触面须平直,接触面积不小于40%。

(7)钩体防跳台和连接杆或钩锁铁的作用须良好。

(8)钩舌与钩体的下承力面应接触良好。

(9)车钩在锁闭位,钩锁铁向上的活动量为5~15mm。

(10)钩舌销与钩耳间隙不得大于1mm。

(11)钩舌内侧与钩锁铁接触面磨耗不得大于7mm。

(12)钩尾销与销孔的间隙不得大于1.5mm,套与销子的椭圆度不得大于1mm。

(13)钩体下磨耗板磨耗量不得大于1mm。检查钩尾框的磨耗状态。

阅读理解

Are you cooperative? Are you a good team member? If so, the future may hold more for you than you think.

   小题1:  That' s happening in those areas of business and data processing where one person and a computer can replace a team of workers.

But, elsewhere, teamwork is very much alive. High technology has led to a new type of teamwork in a number of fields, including advertising, scientific research, engineering design, architecture and ocean exploration.

Through computer networking, scientists, engineers and technicians at different locations —often thousands of miles apart —can work on the same project at once. 小题2:  

Examples— An engineering team can now design and try out a robot system ?a new manufacturing process or an entire factory —before it is built. 小题3:  A medical team can simulate (模拟) a dangerous operation before performing it on a patient.

Of course, computer-assisted team effort doesn't end with investigation and simulation. 小题4:  "CAD-CAM —computer-aided design and manufacture—is breaking down barriers between traditional design and manufacturing functions," explains Dr. Prakash Rao, an engineering manager at General Electric." Interdisciplinary (跨学科的) teams and engineers follow a product from concept to production. Everything is interconnected like a network. "

Sometimes, a computer-aided effort can extend beyond production. A team that produces robots may use them to explore space and ocean depths. 小题5:  

A.They can exchange ideas, try out different designs and test their results.

B.In the future, teamwork will be highlighted by the introduction of new technology.

C.An architectural team can do the same with a building or a bridge.

D.It ends in the products which are extensions of the traditional design.E. It now usually continues into actual design, manufacturing and testing.

F. High technology, some predicted, would make teamwork a thing of the past.

G. For high-technology teamwork, the future seems limitless.

问答题 简答题