[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fTKisG4qM2S5RpygsX16g7ukE6v8bfxTiR5E7eEmrVwg":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2023-11-18 07:32:03",106549180,[8,9,10,11],"oil","sea water","air","fresh water",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},30,"c2c195fcb270d2bc7ccde8b6cc8ceebc","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F379e6c44d7c70f694af30e49df9d5a9d.jpg","船舶柴油机操作与维修","abf98b5b5e854c2eb119e9d6bf2e01f2","主机冷却水系统测试","In a general oil cooler circulated by sea water, the oil is at a higher pressure, the result being that any leak in the cooler will mean a loss of _____",[21,33,42,51,60,69,72,81,90,99],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2023-11-18 07:32:02",106549161,[26,27,28,29],"loss of suction in the circulating pump","leak in the primary cooling system","broken raw water pump shaft","burned or cracked piston in one cylinder","If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a ____","v1",0,{"answer":34,"createTime":23,"id":35,"options":36,"question":41,"source":31,"type":32},[],106549166,[37,38,39,40],"6.0 to7.5","8.0 to 9.5","10.0 to 11.5","12.0 to 13.5","The pH value of water in a diesel engine closed cooling water system should be maintained between _____",{"answer":43,"createTime":5,"id":44,"options":45,"question":50,"source":31,"type":32},[],106549170,[46,47,48,49],"cooling water is alkalescence","cooling water has acidity","cooling water has salinity","cooling water has impurity","The cooling water of diesel engine should be treated because the ___",{"answer":52,"createTime":5,"id":53,"options":54,"question":59,"source":31,"type":32},[],106549175,[55,56,57,58],"no equipment in contact with sea water","less equipment in contact with fresh water","more equipment in contact with sea water","less equipment in contact with sea water","With _____, the corrosion problems are much reduced in a central cooling system",{"answer":61,"createTime":5,"id":62,"options":63,"question":68,"source":31,"type":32},[],106549178,[64,65,66,67],"open, the minimum components","open, the high cooling efficiency","central, there are more coolers and a extra set of pumps","central, there is only one component contacts seawater","The ___________ cooling system needs least maintenance work for _____________________ in this kind of system",{"answer":70,"createTime":5,"id":6,"options":71,"question":19,"source":31,"type":32},[],[8,9,10,11],{"answer":73,"createTime":5,"id":74,"options":75,"question":80,"source":31,"type":32},[],106549181,[76,77,78,79],"larger","safety","lower","bursting","In a common oil cooler circulated by sea water, the oil is at a ____ pressure than the sea water",{"answer":82,"createTime":5,"id":83,"options":84,"question":89,"source":31,"type":32},[],106549182,[85,86,87,88],"excessive crankcase pressure","excessive lube oil temperature","contamination of the lube oil by water","contamination of the cooling water by lube oil","Telescopic pipes to the piston of a large slow-speed main propulsion diesel engine are designed to prevent _____",{"answer":91,"createTime":5,"id":92,"options":93,"question":98,"source":31,"type":32},[],106549183,[94,95,96,97],"a sump tank","a feed well","a double bottom tank","a drain tank","The piston cooling system may employ similar components, except that _____ is used instead of a head tank",{"answer":100,"createTime":5,"id":101,"options":102,"question":107,"source":31,"type":32},[],106549184,[103,104,105,106],"discharge side of the centrifugal pump","suction side of the centrifugal pump","the lowest point of the cooling water system","inlet of the main engine","Where is the cooling water from the compensating tank in the cooling water system of main engine lead to"]