The frequency of an AC generator is controlled by the ___.

A．rheostat

B．governor

C．exciter

D．capacitor

[单选题]The frequency of an AC generator is controlled by theA．rheostatB．governorC．exciterD．capacitor

[单选题]The power factor of an AC generator operating singularly is determined by the_______ .A．connected loadB．prime mover speedC．field excitationD．generator's rated voltage

[单选题]The governor of a generator engine is to （）.A . make the engine stopB . regulate the timing of camshaftsC . make the rpm stabilize at any required valueD . make the engine run at nearly constant speed

[单选题]F．or most diesel propulsion and generator engines, the over-speed trip device will stop the engine byA．moving the governor control to stopB．shutting off the lubricating oil supplyC．tripping the governor emergency stop leverD．shutting off the fuel sup

[单选题]The emergency generator or emergency battery is connected to _______on most large ships.A．distribution boardsB．section boardsC．emergency switch boardsD．main switch boards

[名词解释] 英译汉：generator

[单选题]To communicate __________, both the content and the form. of the message mustbe clear.A． ordinarilyB． pleasantlyC． relevantlyD． effectively

[主观题]Theship’sgeneratorbrokedown,andthepumpshadtobeoperated___insteadofmechanically.A．)artificiallyB)automaticallyC)manuallyD)synthetically

[单选题]Theship’sgeneratorbrokedown,andthepumpshadtobeoperated___insteadofmechanically.A)artificiallyB)automaticallyC)manuallyD)synthetically

[单选题]The frequency of an alternator at a given r/min is determined by the _______ .A．number of turns of wire in the armature coilB．number of magnetic polesC．strength of the magnets usedD．output voltage