2024知到答案 Weldability of Metals and Alloys金属焊接性 最新知到智慧树满分章节测试答案
第一章 单元测试
1、 问题:With carbon equivalent ( ), the steel has a low tendency to harden and cold cracking?
选项：
A:less than 0.40%
B:less than 0.50%
C:less than 0.60%
D:less than 0.80%
答案: 【
less than 0.40%
】
2、 问题:( ) is not a factor that affects weldability.
选项：
A:chemical composition
B:Welding process
C:joint type
D:operation skill
答案: 【
operation skill
】
3、 问题:The calculation formula of carbon equivalent of the IWS considers the influence of () on weldability.
选项：
A:diffusion hydrogen
B:welding process
C:welding structure 
D:chemical composition
答案: 【
diffusion hydrogen
welding process
welding structure 
】
4、 问题:Maximum crack distance has been used to allow more accurate determination of the cracking ( ) range.
选项：
A:size
B:temperature
C:toughness
D:strength
答案: 【
temperature
】
5、 问题:
Weldability is not easily quantified, and can depend on a variety of factors, including ( ).
选项：
A:welding method
B:physical specifics of the joint
C:welded structure
D:operator and welder
答案: 【
welding method
physical specifics of the joint
welded structure
】
第二章 单元测试
1、 问题:The weldability of high-carbon steel is worse than that of low-carbon steel because high-carbon steel is with ( ).
选项：
A:higher carbon content
B:higher toughness
C:higher sulphur content
D:lower melting point
答案: 【
higher carbon content
】
2、 问题:Normally, because of auto-tempering, the postweld microstructure of QTLA steel is ( ).
选项：
A:tempered martensite
B:upper bainite
C:high carbon martensite
D:ledeburite
答案: 【
tempered martensite
】
3、 问题:QTLA steel is not susceptible to solidification cracking because it is with ( ).
选项：
A:low carbon content
B:low impurity content
C:low manganese content
D:low nickel content
答案: 【
low carbon content
low impurity content
】
4、 问题:For HTLA steels, chromium is able to ( ).
选项：
A:increase hardeness of HTLA steels
B:decrease toughness of HTLA steels
C:decrease hardeness of HTLA steels
D:increase toughness of HTLA steels
答案: 【
increase hardeness of HTLA steels
decrease toughness of HTLA steels
】
5、 问题:When you weld HTLA steels, you’d better to take advantage of auto-tempering.
选项：
A:对
B:错
答案: 【
错
】
6、 问题:Auto-tempering occurs after welding when ( ).
选项：
A:carbon content of weld is low
B:cooling rate is slow
C:peak temperature is high
D:Ms is high
答案: 【
carbon content of weld is low
cooling rate is slow
】
7、 问题:Before designing welding procedure, we’d better to analyze the weldability of the workpiece.
选项：
A:对
B:错
答案: 【
对
】
8、 问题:To remedy the underbead cracking, we need to reduce cooling rate when we weld oil engine connecting rod.
选项：
A:对
B:错
答案: 【
对
】
9、 问题:If the carbon content of a type of steel is 0.1%, this steel is a kind of ( ).
选项：
A:low-carbon steel
B:medium-carbon steel
C:high-carbon steel
D:HTLA steel
答案: 【
low-carbon steel
】
第三章 单元测试
1、 问题:Weld metal of austenitic stainless steels is susceptible to weld decay.
选项：
A:对
B:错
答案: 【
错
】
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本文章不含期末不含主观题！！
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