Electrical Machines Autotransformer makes effective saving on copper and copper losses, when its transformation ratio is equal to greater than one. approx to one. less than one. very low greater than one. approx to one. less than one. very low ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In travelling cranes for crane travel, trolley and boom hoist which motor is preferred? Slip ring induction motor. Stepper motor. Synchronous motor. DC differential compound motor. Slip ring induction motor. Stepper motor. Synchronous motor. DC differential compound motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which transformer, the tertiary winding is used? Delta - star Star - star Delta - delta Star - delta Delta - star Star - star Delta - delta Star - delta ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single phase, 2 KV alternator has an armature resistance of 0.8 ohms and 4.94 ohms respectively. The voltage regulation of the alternator at 100 a load 0.8 loading power factor is 8.9%. 14%. 0%. 7%. 8.9%. 14%. 0%. 7%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is/are the necessary conditions for voltage build up in self excited generator? 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. Poles should contain residual flux. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For pure resistive load what is the armature reaction? All of these demagnetization magnetization cross magnetization All of these demagnetization magnetization cross magnetization ANSWER DOWNLOAD EXAMIANS APP
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