Electrical Machines Capacitor start capacitor run provides none. high staring torque only. high power factor only. high staring torque and high power factor. none. high staring torque only. high power factor only. high staring torque and high power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm. Find the rotor efficiency? 96% 95% 94% 92% 96% 95% 94% 92% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the excitation is increased, the power factor is lagging power factor None of these unity power factor leading power factor lagging power factor None of these unity power factor leading power factor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature mmf of a DC machine has triangular space distribution and is stationary in space. triangular space distribution and rotates at the speed of armature. trapezoidal space distribution and is stationary in space. stepped distribution and rotates at the speed of armature. triangular space distribution and is stationary in space. triangular space distribution and rotates at the speed of armature. trapezoidal space distribution and is stationary in space. stepped distribution and rotates at the speed of armature. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines High inrush of current during a starting of DC motor can efficiently be restricted to a safer value by increasing the _________________ resistance. both A and B shunt field none of above armature circuit both A and B shunt field none of above armature circuit ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase, alternator has generated emf per phase of 230 V with 10% 3rd harmonic and 6% 5th harmonic content. Calculate rms line voltage for star connection. 100 V. 399 V. 50 V. 230.2 V. 100 V. 399 V. 50 V. 230.2 V. ANSWER DOWNLOAD EXAMIANS APP
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