[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f72AaO1l6JebrDmE18XMuySxqBqiR-cdf2PAQBYqWhM8":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",288807655,[8,9,10,11],"governor","rheostat","capacitor","exciter",{"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 frequency of an AC generator is controlled by the ______",[21,32,35,44,53,62,71,80,89,98],{"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":6,"options":34,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":36,"createTime":5,"id":37,"options":38,"question":43,"source":30,"type":31},[],288807657,[39,40,41,42],"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":45,"createTime":5,"id":46,"options":47,"question":52,"source":30,"type":31},[],288807659,[48,49,50,51],"an automatic voltage regulator","a transformer","the reactive power","a governor","The excitation of the generator is controlled by______",{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":30,"type":31},[],288807661,[57,58,59,60],"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":63,"createTime":5,"id":64,"options":65,"question":70,"source":30,"type":31},[],288807662,[66,67,68,69],"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":72,"createTime":5,"id":73,"options":74,"question":79,"source":30,"type":31},[],288807663,[75,76,77,78],"insulating","dustproof","insulated","waterproof","Rotor and stator of the alternator were cleaned by special cleaner, dried and painted with one coat of ______ paint",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":30,"type":31},[],288807664,[84,85,86,87],"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":90,"createTime":5,"id":91,"options":92,"question":97,"source":30,"type":31},[],288807665,[93,94,95,96],"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":99,"createTime":5,"id":100,"options":101,"question":106,"source":30,"type":31},[],288807666,[102,103,104,105],"rotate; rotates","are stationary; is stationary","rotate; is stationary","are stationary; rotates","The field coils ___ and the armature ______. This is in fact the arrangement adopted for large, heavy duty alternators"]