Basic Mechanical Engineering Material & machining -1

•What is automation advantages?

自动化的优点是什么?

• A.Greater productivity and enhanced quality output.

  A.更高的生产率和更高的质量输出

• B.Lower operation cost

  B.降低运营成本

• C.Higher information accuracy

  C.更高的信息准确性

• D.High maintenance and costly.

  D.高维护和高成本

• E.Replace hazardous and monotonous work

  E.取代危险单调的工作

•What are the components of a complete automation equipment?

一台完整的自动化设备由哪些部分组成？

• A. Machining parts 机械零件

• B. Actuators 执行元件

• C. Transmission system 传动元件

• D. Electrical control system 电气控制

•Which of the following materials are Low carbon steel？

以下哪些材料属于低碳钢?

• A.45#

• B.Reinforcing bars

  B.钢筋

• C.I-beams

  C.工字钢

• D.Q235

•Which of the following materials are medium carbon steel？

以下哪些材料属于中碳钢?

• A.45#

• B.50Mn

• C.T8

• D.W18Cr4V

•What is the carbon content of medium carbon steel？

中碳钢的碳含量是多少？

• A.0.2%<0.6%

• B.0.4%--0.8%

• C.0.25%--0.6%

• D.>0.6%

•Stainless steel contains high amounts of ？

不锈钢中含有大量的？

• A.Mn

• B.Cr

• C.Si

• D. Zn

•Brass is an alloy of what? 黄铜是什么的合金？。

• A Copper and zinc

  A.铜和锌

• B Copper and mg

  B.铜和镁

• C Copper and Cr

  C.铜和铬

• D Copper and Si

  D.铜和硅

•The steel used to make carburized parts is called ( )

用于制造渗碳零件的钢称为( )

• A Structural steel

  A.结构钢

• B Alloy steel

  B.合金钢

• C Carburized steel

  C.渗碳钢

• D Tool steel

  D.工具钢

Tempering treatment is:

调质处理就是（ ）的热处理。

• A.Quenching + High temperature tempering

  A.淬火+高温回火

• B.Quenching + Medium temperature tempering

  B.淬火+中温回火

• C.Quenching + low temperature tempering

  C.淬火+低温回火

• D.Quenching +Low temperature annealing

  D.淬火+低温退火

•The most widely used electrochemical methods are( ) and anodize.

电化学方法中应用最广的有（ ）法和阳极氧化法

• A.Electroless plating

  A.化学镀

• B.Chemical vapor deposition

  B.化学气相沉积

• C.chrome plating

  C.电镀

• D.Electrophoretic coating

  D. 电泳涂装