电焊工考试试题.docx
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电焊工考试试题.docx
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电焊工考试试题
电焊工考试试题
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一.填充题;(每空0.5分,共20分)
1.不同厚度钢板对接,进行环缝焊接时,应对厚板进行处___理。
2.焊接接头的基本形式可分对接接头、、——————————————————
、搭接接头。
————
3.焊接时常见的焊缝内部缺陷有气孔、、、—————————————————
、未焊透、加钨等。
—————————
4.焊接电缆的常用长度不超过米。
——————
5.厚度较大的焊接件应选用较大的焊条。
————————
6.焊条直径的选择应考虑、、焊接—————————————————————————位置、焊接层数。
7.一般电弧焊接过程包括、、————————————————————————————
。
——————————
8.有限空间场所焊接作业的主要危险是缺氧窒息、——————————、、易于触电。
————————————————
9.在易燃易爆、有毒、窒息等环境中焊接作业前,必须进行——
和作业。
————————————
10.焊条受潮后为焊接工艺性能变差,而且水分中的氢容易产生
、等缺陷。
——————————————————
feelfreetolistentotheirvoicesandhelpthemassessolveproblems,wewereofficiallyopenedonMay10"12345"Mayorcalls,formulatedrulesandregulations,equippedwithafull-timestaff,a24-houron-dutysystem,peopletocalltoreceive,reply,action,reminders,feedbackandsoon.Byyearend,handledthecrowdcalls1076,94.7%feedbackrate.ByMayorcallsactivecoordinationtosolvealargenumberofbearsontheimmediateinterestsofthepeopleandissuesofgreatlives,butalsoforleadershipresearchanddecisiontocollectalotofgoodideasandsuggestions,byallsectorsofthecommunityalike.Second,startMunicipalGovernmentAffairsHallbuilt.OnMay11,webuiltandlaunchedthecity-governmentlobby,weresettledin12departments,strictimplementationoffirstaskingdutysystem,servicesystem,systemofgratuitous,"receiving,internalcoordination,headofthewindowhandle,limitedtimeconcluded"one-stopservice.Bytheendoftodaytoacceptvarioustypesof3,273,originallyofupto100%.RunningGovernmentAffairsHall,theconvenienceofthemasses,promotingopenGovernment,improvetheinvestmentenvironmentandsolvetheirpracticalproblems,andsodidalotofwork,masses,servethecommunityfortheGovernmenttoplayaverygood"window,link,model".Third,createacitygovernmentpublicaffairsnetwork.WerelyontheGovernmentWebsite,wascompletedonMay24,theprovince'sfirstpublicaffairsnetwork.Over
11.常用钢材中的五大元素,影响焊接性能的主要元素是—————、、磷。
———————
12.气体保护焊可以分成气体保护焊、气———————————————————体保护焊两大类。
13.下列操作应在切断电源后进行、、—————————————————————
、检修焊机、更换保险丝。
———————————
14.自动埋弧焊的主要焊接工艺参数为、———————————————————
、。
——————————————
15.焊接残余变形的矫正法有和——————————————————————————两大类。
16.焊接接头中以的疲劳强度最高。
——————————————
17.能降低焊件焊后的冷却速度。
————————
18.消除或减小焊接残余应力的方法有整体高温回火、———————
、、温差拉伸法、机械震动法。
—————————————————————
19.焊接残余变形可分为角变形、、波浪变形、—————————————
、横向缩短。
———————————
20.防止或减少焊接变形的工艺措施有选择合理的、——————————选择合理的和、反变形法、刚性固定法、————————————————————
散热法。
二.选择题:
(每题1分,共20分)
1.焊接时,使焊条药皮发红的热量是()
A.电阻热B.电弧热C.化学热
feelfreetolistentotheirvoicesandhelpthemassessolveproblems,wewereofficiallyopenedonMay10"12345"Mayorcalls,formulatedrulesandregulations,equippedwithafull-timestaff,a24-houron-dutysystem,peopletocalltoreceive,reply,action,reminders,feedbackandsoon.Byyearend,handledthecrowdcalls1076,94.7%feedbackrate.ByMayorcallsactivecoordinationtosolvealargenumberofbearsontheimmediateinterestsofthepeopleandissuesofgreatlives,butalsoforleadershipresearchanddecisiontocollectalotofgoodideasandsuggestions,byallsectorsofthecommunityalike.Second,startMunicipalGovernmentAffairsHallbuilt.OnMay11,webuiltandlaunchedthecity-governmentlobby,weresettledin12departments,strictimplementationoffirstaskingdutysystem,servicesystem,systemofgratuitous,"receiving,internalcoordination,headofthewindowhandle,limitedtimeconcluded"one-stopservice.Bytheendoftodaytoacceptvarioustypesof3,273,originallyofupto100%.RunningGovernmentAffairsHall,theconvenienceofthemasses,promotingopenGovernment,improvetheinvestmentenvironmentandsolvetheirpracticalproblems,andsodidalotofwork,masses,servethecommunityfortheGovernmenttoplayaverygood"window,link,model".Third,createacitygovernmentpublicaffairsnetwork.WerelyontheGovernmentWebsite,wascompletedonMay24,theprovince'sfirstpublicaffairsnetwork.Over
2.焊前预热的主要目的是()。
A.防止产生偏折B.防止夹渣C.减少淬硬倾向,防止产生裂纹
3.熔渣的熔点应比被焊金属的熔点()A.高B.低C相等
4.()的焊缝极易形成热裂纹。
A窄而浅B窄而深C宽而浅
5.焊条电弧焊时,焊接区内氮的主要来源是()A药皮B母材C焊接区周围的空气6焊接电弧是气体的()现象。
A燃烧B导电C对流
7薄板焊接时宜采用()运条法。
A直线往复B锯齿形C月牙形
8为防止平板对接接头的角变形,可采用()。
A增加板厚B反变形法C增加根部间隙
9焊接电流主要影响焊缝的()
A熔宽B熔深C余高
10()位置焊接可选较大的焊接电流。
A.平焊B.横焊C.立焊D.仰焊
11()是指在焊接工程中,熔池中的气泡在凝固时未能逸出而残留下来所形成的空穴。
A气孔B.裂纹C咬边D夹渣
feelfreetolistentotheirvoicesandhelpthemassessolveproblems,wewereofficiallyopenedonMay10"12345"Mayorcalls,formulatedrulesandregulations,equippedwithafull-timestaff,a24-houron-dutysystem,peopletocalltoreceive,reply,action,reminders,feedbackandsoon.Byyearend,handledthecrowdcalls1076,94.7%feedbackrate.ByMayorcallsactivecoordinationtosolvealargenumberofbearsontheimmediateinterestsofthepeopleandissuesofgreatlives,butalsoforleadershipresearchanddecisiontocollectalotofgoodideasandsuggestions,byallsectorsofthecommunityalike.Second,startMunicipalGovernmentAffairsHallbuilt.OnMay11,webuiltandlaunchedthecity-governmentlobby,weresettledin12departments,strictimplementationoffirstaskingdutysystem,servicesystem,systemofgratuitous,"receiving,internalcoordination,headofthewindowhandle,limitedtimeconcluded"one-stopservice.Bytheendoftodaytoacceptvarioustypesof3,273,originallyofupto100%.RunningGovernmentAffairsHall,theconvenienceofthemasses,promotingopenGovernment,improvetheinvestmentenvironmentandsolvetheirpracticalproblems,andsodidalotofwork,masses,servethecommunityfortheGovernmenttoplayaverygood"window,link,model".Third,createacitygovernmentpublicaffairsnetwork.WerelyontheGovernmentWebsite,wascompletedonMay24,theprovince'sfirstpublicaffairsnetwork.Over
12在焊接一些厚度较大,焊接接头冷却较快和母材金属淬硬倾向较大的焊件时,焊缝中容易产生()
A气孔B夹渣C咬边D冷裂纹
13焊接的坡口钝边如太大,在焊接时容易产生()A焊瘤B夹渣C咬边D.未焊透
14当焊条的药皮中含有较多的()时会降低电弧燃烧的稳定性。
A钾B钠C钙D氟化物
15弧长缩短时,焊接电弧静特性曲线将()
A上升B下降C不变
16.提高弧焊电源的空载电压,则电弧稳定性将()A提高B不变C下降
17要求焊缝有良好的塑性、韧性和抗裂性能时,应选用()焊条。
A.酸性焊条B.铁粉高效焊条C.碱性焊条
18焊接碳素钢熔渣的主要成分是()。
A碳化物B氟化物C氧化物D硫化物19()坡口加工最容易。
A(V形B.X形C.U形
20焊接电缆时采用多股细()制成。
A钢丝B铝丝C铜丝D不锈钢丝
三.判断题(每题1分,共20分)
1电弧是各种熔焊方法的热源。
()feelfreetolistentotheirvoicesandhelpthemassessolveproblems,wewereofficiallyopenedonMay10"12345"Mayorcalls,formulatedrulesandregulations,equippedwithafull-timestaff,a24-houron-dutysystem,peopletocalltoreceive,reply,action,reminders,feedbackandsoon.Byyearend,handledthecrowdcalls1076,94.7%feedbackrate.ByMayorcallsactivecoordinationtosolvealargenumberofbearsontheimmediateinterestsofthepeopleandissuesofgreatlives,butalsoforleadershipresearchanddecisiontocollectalotofgoodideasandsuggestions,byallsectorsofthecommunityalike.Second,startMunicipalGovernmentAffairsHallbuilt.OnMay11,webuiltandlaunchedthecity-governmentlobby,weresettledin12departments,strictimplementationoffirstaskingdutysystem,servicesystem,systemofgratuitous,"receiving,internalcoordination,headofthewindowhandle,limitedtimeconcluded"one-stopservice.Bytheendoftodaytoacceptvarioustypesof3,273,originallyofupto100%.RunningGovernmentAffairsHall,theconvenienceofthemasses,promotingopenGovernment,improvetheinvestmentenvironmentandsolvetheirpracticalproblems,andsodidalotofwork,masses,servethecommunityfortheGovernmenttoplayaverygood"window,link,model".Third,createacitygovernmentpublicaffairsnetwork.WerelyontheGovernmentWebsite,wascompletedonMay24,theprovince'sfirstpublicaffairsnetwork.Over
2焊芯的作用只是传递电流。
()
3焊剂使用前必须进行烘干。
()
4E4303是典型的碱性焊条。
()
5搭接接头的强度没有对接接头高。
()
6钝边的作用是防止接头根部焊穿。
()
7焊接电压增加时,焊缝厚度和余高将略有减小。
()8焊缝的形成系数越小越好。
()9药皮焊条与光焊条相比,容易产生焊缝加渣。
()10碱性焊条的烘干温度应该比酸性焊条好。
()11焊丝上镀铜的目的是,防止产生焊接裂纹。
()12气体保护焊很易于实现全位置焊接。
()13搭接接头的焊缝形式是属于角焊缝。
()14焊接长焊缝时,连续焊变形最大。
()15采用碱性焊条时,应该用短弧焊接。
()
16为了减小应力,应该先焊接结构中收缩量最小的焊缝。
()
17常采用的断续角焊缝应该是交错的。
()
18在同样厚度和焊接条件下,X型坡口的变形比V型大。
()
feelfreetolistentotheirvoicesandhelpthemassessolveproblems,wewereofficiallyopenedonMay10"12345"Mayorcalls,formulatedrulesandregulations,equippedwithafull-timestaff,a24-houron-dutysystem,peopletocalltoreceive,reply,action,reminders,feedbackandsoon.Byyearend,handledthecrowdcalls1076,94.7%feedbackrate.ByMayorcallsactivecoordinationtosolvealargenumberofbearsontheimmediateinterestsofthepeopleandissuesofgreatlives,butalsoforleadershipresearchanddecisiontocollectalotofgoodideasandsuggestions,byallsectorsofthecommunityalike.Second,startMunicipalGovernmentAffairsHallbuilt.OnMay11,webuiltandlaunchedthecity-governmentlobby,weresettledin12departments,strictimplementationoffirstaskingdutysystem,servicesystem,systemofgratuitous,"receiving,internalcoordination,headofthewindowhandle,limitedtimeconcluded"one-stopservice.Bytheendoftodaytoacceptvarioustypesof3,273,originallyofupto100%.RunningGovernmentAffairsHall,theconvenienceofthemasses,promotingopenGovernment,improvetheinvestmentenvironmentandsolvetheirpracticalproblems,andsodidalotofwork,masses,servethecommunityfortheGovernmenttoplayaverygood"window,link,model".Third,createacitygovernmentpublicaffairsnetwork.WerelyontheGovernmentWebsite,wascompletedonMay24,theprovince'sfirstpublicaffairsnetwork.Over
19焊件的装配间隙越大,横向收缩量越大。
()
20焊机空载电压一般不超过100V,否则将对焊工产生危险。
(
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