Electrical Machines No load test of 3-phase induction motor gives which of the following? both A and B None of these variable loss constant loss both A and B None of these variable loss constant loss 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 1/2 times maximum value of flux due to any phase 3/2 times maximum value of flux due to any phase equal to φm, where φm is the maximum flux due to any phase 3 times maximum value of 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 equal to φm, where φm is the maximum flux due to any phase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft of induction motor may be unbalanced due to overheating of winding. overload. poor lubrication. uneven air gap. overheating of winding. overload. poor lubrication. uneven air gap. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Addition of 0.3 % to 4.5 % silicon to iron increases the electrical resistivity of iron. None of these increases the hysteresis loss. reduces the saturation magnetization. increases the electrical resistivity of iron. None of these increases the hysteresis loss. reduces the saturation magnetization. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature resistance control method is also called as-----------? constant power control constant voltage control constant current control constant torque control constant power control constant voltage control constant current control constant torque control ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A three phase 400 V, 6 pole, 50 Hz, squirrel cage induction motor is running at a slip of 5%. The speed of stator magnetic field with respect to rotor magnetic field and speed of rotor w.r.t stator magnetic field are 1000 rpm, 950 rpm. 1000 rpm, - 50 rpm. zero, 950 rpm. zero , - 50 rpm. 1000 rpm, 950 rpm. 1000 rpm, - 50 rpm. zero, 950 rpm. zero , - 50 rpm. ANSWER DOWNLOAD EXAMIANS APP