Electrical Machines Two transformers with identical rating, are designed with flux densities of 1.2 and 1.4 Wb / m2 respectively. The weight of first transformer per kVA is equal to that of second transformer. more than that of second transformer. less than that of second transformer. none of these. equal to that of second transformer. more than that of second transformer. less than that of second transformer. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous motor when the rotor speed exceeds the synchronous speed during hunting the damper bars develop induction generator torque. the damper bars develop induction motor torque. negative sequence currents are generated. the damper bars develop synchronous motor torque. the damper bars develop induction generator torque. the damper bars develop induction motor torque. negative sequence currents are generated. the damper bars develop synchronous motor torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the excitation of normally operating unloaded, salient pole synchronous motor suddenly gets disconnected, it continues to run as a DC motor. variable reluctance motor. induction motor. switched reluctance motor. DC motor. variable reluctance motor. induction motor. switched reluctance motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - φ induction motor can also be referred to as a repulsion motor. shunt motor. asynchronous motor. transformer. repulsion motor. shunt motor. asynchronous motor. transformer. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of 3 - Φ IM, plugging means pulling the motor directly on line without a rotor. interchanging two supply phases for quick stopping. locking of rotor due to harmonics. starting the motor on load which is more than the rated load. pulling the motor directly on line without a rotor. interchanging two supply phases for quick stopping. locking of rotor due to harmonics. starting the motor on load which is more than the rated load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Unbalance 3 - Φ stator currents cause double frequency currents in the rotor. All of these vibrations. heating of rotor. double frequency currents in the rotor. All of these vibrations. heating of rotor. ANSWER DOWNLOAD EXAMIANS APP
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