Online TestFlux and MMF Phasors in Synchronous Machines Electrical Machines Questions and Answers – Synchronous Machines Flux and MMF Phasors in Synchronous Machines 0% The brushless excitation and conventional DC excitation systems are comparable but one significant change is _______ a three phase rectifier is fed by main exciter pilot exciter is brushless permanent magnet motor no direct rectification is provided to the pilot exciter three phase rectifier feeds directly to main exciter Correct! Wrong! - Continue >> The static excitations mainly comprises of _______ thyrister based excitation system brushless excitation system synchronous motor excitation system brushless and thyristor based excitation system Correct! Wrong! - Continue >> A 3 phase synchronous machine is _________ excited machine. feedback based single doubly two stage Correct! Wrong! - Continue >> The main exciter used in DC excitation is ______ field on stator field on rotor field on poles armature on stator Correct! Wrong! - Continue >> The excitation system and speed of alternator has ______ circular response exponential response rectangular hyperbola response linear response Correct! Wrong! - Continue >> Field winding of a dc machine always absorbs power always delivers power delivers power while behaving as generator absorbs real power at lagging load Correct! Wrong! - Continue >> The main problems faced by conventional DC exciters are/is __ cooling and maintainance wear and tear additional parasitic losses all of the mentioned Correct! Wrong! - Continue >> If the DC excitation is suddenly dropped to 0 ,the three phase alternator ________ runs as motor stops to zero speed in few seconds no change in the operating conditions continues to run as motor but at lower speed Correct! Wrong! - Continue >> The pilot exciter in dc exciters is ______ universal motor any of the mentioned dc shunt generator feeding field winding of mains stepper motor feeding the field winding of mains Correct! Wrong! - Continue >> In large synchronous machine, field winding is placed on ______ and ac supply on _____ rotor, stator pole shoes, stator armature, slots stator, rotor Correct! Wrong! - Continue >> Share the quiz to show your results ! Facebook Facebook Just tell us who you are to view your results ! Show my results >> Flux and MMF Phasors in Synchronous Machines I got %%score%% of %%total%% right ↺ PLAY AGAIN ! Share With Your Friends Facebook Twitter LinkedIn Pinterest Email WhatsApp
