Electrical Machines A generator may loose residual magnetism due to vibrations. any of these. heating. over excitation. vibrations. any of these. heating. over excitation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is/are the necessary conditions for voltage build up in self excited generator? All of these Poles should contain residual flux. Field winding should be properly connected to armature winding. Field winding resistance should be less than critical resistance. All of these Poles should contain residual flux. Field winding should be properly connected to armature winding. Field winding resistance should be less than critical resistance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A three phase induction motor has a synchronous speed of 1500 rpm the machine runs at 1460 rpm at a particular load. The slip at this load is ___________. 1.5 %. 30 %. 2.67 %. 5 %. 1.5 %. 30 %. 2.67 %. 5 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor of a three phase induction motor has an impedance of 0.4 + j4 ohm per phase at standstill the maximum torque occurs at a slip of _____________. 50 %. 15 %. 10 %. 25 %. 50 %. 15 %. 10 %. 25 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In the 3-phase induction motor, the resultant flux is of a constant nature and is 3 times maximum value of flux due to any phase equal to φm, where φm is the maximum flux due to any phase 1/2 times maximum value of flux due to any phase 3/2 times maximum value of flux due to any phase 3 times maximum value of flux due to any phase equal to φm, where φm is the maximum flux due to any phase 1/2 times maximum value of flux due to any phase 3/2 times maximum value of flux due to any phase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor is not suitable for frequent starting and stopping? All of these Resistance split phase motor Capacitor split phase motor Capacitor run motor All of these Resistance split phase motor Capacitor split phase motor Capacitor run motor ANSWER DOWNLOAD EXAMIANS APP
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