Electrical Machines The material used for commutator brushes is mostly mica. copper. cast iron. carbon. mica. copper. cast iron. carbon. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following voltage regulation method is accurate ? MMf method Synchronous impedance method ZPF method American standard association method MMf method Synchronous impedance method ZPF method American standard association method ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V dc machine has an armature resistance of 1Ω.If the full-load current is 20 A, the differenc in the induced voltages when the machine is running as a motor and as a generator is 20 V 40 V zero 50 V 20 V 40 V zero 50 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following generators are used in arc welding? differential compound generators series generators cumulative compound generators shunt generators differential compound generators series generators cumulative compound generators shunt generators ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following DC generators has rising V-I characteristics? None of them. Shunt. Series. Compound. None of them. Shunt. Series. Compound. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is/are the necessary conditions for voltage build up in self excited generator? Poles should contain residual flux. All of these Field winding should be properly connected to armature winding. Field winding resistance should be less than critical resistance. Poles should contain residual flux. All of these Field winding should be properly connected to armature winding. Field winding resistance should be less than critical resistance. ANSWER DOWNLOAD EXAMIANS APP
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