[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f7ncmzMyJ1xkEfmtjsSQzroWpcr9EM7c9SNpUMouIUHo":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2025-12-27 08:44:33",288807666,[8,9,10,11],"rotate; rotates","are stationary; is stationary","rotate; is stationary","are stationary; rotates",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},35,"1ee0524c41359babf33f794b5cc60b3f","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F25b30343053994e8940089572d36015b.jpg","船舶电子电气专业英语2","exam_167429627","","The field coils ___ and the armature ______. This is in fact the arrangement adopted for large, heavy duty alternators",[21,32,41,50,59,68,77,86,95,104],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],288807653,[25,26,27,28],"proportional to","changed to","equal to","proper to","The frequency of the induced voltages is ______ the rotational speed and the number of poles in the synchronous machine","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],288807655,[36,37,38,39],"governor","rheostat","capacitor","exciter","The frequency of an AC generator is controlled by the ______",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],288807657,[45,46,47,48],"wasted energy","efficient operation","a short in the exciter field windings","an excessive number of minor system grounds","In an alternating current electrical system, a low system power factor is a direct sign of _______",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],288807659,[54,55,56,57],"an automatic voltage regulator","a transformer","the reactive power","a governor","The excitation of the generator is controlled by______",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],288807661,[63,64,65,66],"reverse power relays","field rheostats","voltage regulators","prime mover governors","The division of the kilowatt load between two AC generators operating in parallel is controlled by the settings and characteristics of the______",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":30,"type":31},[],288807662,[72,73,74,75],"strength of the magnets used","number of magnetic poles","number of turns of wire in the armature coil","output voltage","The frequency of an alternator at a given RPM is determined by the ______",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":30,"type":31},[],288807663,[81,82,83,84],"insulating","dustproof","insulated","waterproof","Rotor and stator of the alternator were cleaned by special cleaner, dried and painted with one coat of ______ paint",{"answer":87,"createTime":5,"id":88,"options":89,"question":94,"source":30,"type":31},[],288807664,[90,91,92,93],"power factor","load","full excitation","number of poles","The frequency of the alternating current generated by a synchronous generator is governed by the speed and the______",{"answer":96,"createTime":5,"id":97,"options":98,"question":103,"source":30,"type":31},[],288807665,[99,100,101,102],"three-wire DC generator","saturable core reactor","ship's service alternator","magnetic amplifier","An electrical device which employs a stationary armature and a rotating electromagnetic field may be used aboard as a _________",{"answer":105,"createTime":5,"id":6,"options":106,"question":19,"source":30,"type":31},[],[8,9,10,11]]