[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$foKW8bSe30_eSunoOpWC82_BqZJmUExhPgGtDtSNkVpM":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-05-13 00:52:56",143161618,[8,9,10,11],"increased fuel consumption","increased feed water consumption","fuel pump failure","combustion control system failure",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},62,"169722bbe4a4a0c2c6612f3604dceae4","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbbb489a99a52ca1b15fec20f6cb36f3b.jpg","轮机英语","e33b98aec4e149a68abc8c037318fa57","","Improper maintenance of the fuel oil burners in an automatically fired auxiliary boiler, could result in ____",[21,32,41,50,53,62,68,77,86,95],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],143161615,[25,26,27,28],"at high loads to prevent overheating","at low loads to prevent corrosion in the boiler","during periods of high steam demand","when the turbocharger is in operation","When a waste heat boiler is installed in the exhaust of a main propulsion diesel engine, the exhaust gas bypass would be used______","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],143161616,[36,37,38,39],"prevent soot fires in the exhaust system","prevent exhaust gas erosion of the tubes","increase the velocity of exhaust gas flow","increase the rate of heat transfer","Fins are installed on the generating tube surfaces in waste heat boilers to______",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],143161617,[45,46,47,48],"remove suspended and precipitated solids from the boiler water","completely drain the boiler in an emergency situation","prevent hardened scale deposits in the water drum","remove floating impurities from the oily water surface","Bottom blow valves are installed on auxiliary water-tube boilers to _____",{"answer":51,"createTime":5,"id":6,"options":52,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":30,"type":31},[],143161619,[57,58,59,60],"reduce engine exhaust noise","reduce engine back pressure","recover heat which otherwise would be lost","increase turbocharger efficiency","The primary function of a waste heat boiler is to_____",{"answer":63,"createTime":5,"id":64,"options":65,"question":67,"source":30,"type":31},[],143161620,[57,58,66,60],"increase engine cycle efficiency","A secondary function of a waste heat boiler is to_____",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":30,"type":31},[],143161621,[72,73,74,75],"provide steam for emergency propulsion","provide steam for the turbo-generator","heat the waste water tanks","steam for warming engines","A waste heat boiler is installed on some diesel propelled vessels to____",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":30,"type":31},[],143161622,[81,82,83,84],"gas composition","gas temperature","pressure","timing","The maximum pressure developed by a waste heat boiler is determined by the main engine exhaust________",{"answer":87,"createTime":5,"id":88,"options":89,"question":94,"source":30,"type":31},[],143161623,[90,91,92,93],"Combustion gases flow through the tubes","Flames impinge on the tubes","Combustion occurs in the tubes","Water flows through the tubes","Which of the following statements concerning fire-tube boilers is correct",{"answer":96,"createTime":5,"id":97,"options":98,"question":103,"source":30,"type":31},[],143161624,[99,100,101,102],"relieve excess fuel oil pressure during the "off" fire cycle","admit water to the dry pipe","throttle the forced draft fan output for proper combustion","reduce excess steam pressure in the boiler","The purpose of the safety relief valves installed on an auxiliary boiler is to________"]