【判断题】【消耗次数:1】
建筑钢材分为普通碳素钢、普通低合金钢和热处理低合金钢三类。大量使用的以普通低 合金钢为主。
正确
错误
参考答案:
复制
纠错
相关题目
【单选题】 钢材按照( )分为合金钢、低合金钢和非合金钢。
①  化学成分
②  质量等级
③  使用性能
④  脱氧程度
【判断题】 对普通低合金钢件进行淬火强化效果不显著。
①  正确
②  错误
【判断题】 低合金钢的塑性和韧性较差。
①  正确
②  错误
【多选题】 采用低合金钢的主要目的是:( )
①  提高强度
②  减轻结构重量
③  节约钢材
④  延长使用寿命
【判断题】 对低碳低合金钢进行正火处理可提高其硬度。
①  正确
②  错误
【判断题】 耐候钢是在碳素钢和低合金钢中加入少量铜、铬、镍、钼等合金元素而制成。
①  正确
②  错误
【判断题】 Mn,是为了使焊缝成分变成低合金钢。
①  正确
②  错误
【判断题】 低合金钢比碳素结构钢更适合于高层及大跨度结构。
①  正确
②  错误
【判断题】 低合金钢比碳素结构钢更适合于高层及大跨度结构.
①  正确
②  错误
【单选题】 用于焊接结构压力容器主要受压元件的碳素钢和低合金钢,其含碳量不应大于( )。
①  0.30%
②  0.25%
③  0.20%
随机题目
【判断题】 Ever since he arrived, he has been complaining constantly about the weather.
①  正确
②  错误
【判断题】 He as well as I agree with you on that point.
①  正确
②  错误
【判断题】 Without the radar receiver, the large antenna would be of no use.
①  正确
②  错误
【判断题】 He had his leg break when he slipped on a piece of ice.
①  正确
②  错误
【判断题】 I dont swim now, but I used to do when I was a kid.
①  正确
②  错误
【判断题】 His government insisited that he stay until he finished his degree.
①  正确
②  错误
【判断题】 The girl is made to do her homework right after she comes from school.
①  正确
②  错误
【判断题】 This kind of trousers is washed very well.
①  正确
②  错误
【单选题】 Never before ___ in greater need of modern public transport than it is today.
①  ?has this city been
②  ?this city has been
③  ?was this city
④  this city was
【单选题】 Little ___ that we were watching his every move, so he seemed to be going his own way in this business.
①  he realized
②  ?he didn’t realize
③  ?didn’t he realize
④  ?did he realize