Electrical Machines To avoid formation of grooves in the commutator brush position has no effect on the commutator grooving. the brushes of same polarity should track each other. the brushes of opposite polarity should track each other. None of these brush position has no effect on the commutator grooving. the brushes of same polarity should track each other. the brushes of opposite polarity should track each other. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A belt-driven cumulatively-compound dc generator is delivering power to the dc mains. If the Belt snaps then the machine will run as a differentially compounded motor in the opposite direction cumulative compounded motor in the same direction differentially compounded motor in the same direction cumulative compounded motor in opposite direction differentially compounded motor in the opposite direction cumulative compounded motor in the same direction differentially compounded motor in the same direction cumulative compounded motor in opposite direction ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 ,V 15 , kW 100 rpm shunt motor with armature resistance of 0.25 , W has a rated line current of 68 A and a rated field current of 2.2 A. The change in field flux required to obtain a speed of 1600 rpm while drawing a line current of 52.8 A and a field current of 1.8 A is 18.18% increase 36.36% increase 36.36% decrease 36.36% increase 18.18% increase 36.36% increase 36.36% decrease 36.36% increase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following DC generator will be in a position to build up without any residual magnetism in the field? Series. Separately excited. Compound. Shunt. Series. Separately excited. Compound. Shunt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 230 volt dc motor has an armature winding resistance of 0.5 ohm. Calculate the emf induced by the motor if the full load armature current is 23 ampere. None of these. 218.5 volt. 220.4 volt. 120 volt. None of these. 218.5 volt. 220.4 volt. 120 volt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What are slot wedges in a DC machine made of? Silicon steel. Fibre. Mild steel. Cast iron. Silicon steel. Fibre. Mild steel. Cast iron. ANSWER DOWNLOAD EXAMIANS APP
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