Electrical Machines Which motor cannot be started on no load? series motors shunt motors cumulative compound motors both B and C series motors shunt motors cumulative compound motors both B and C ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two of supply terminals to a 3 - Φ induction motor get interchanged during re-connection after normal maintenance. When switched on the supply, the motor will get heated and damaged. not start at all. rotate in the same direction as before maintenance. rotate in direction opposite to that before maintenance. get heated and damaged. not start at all. rotate in the same direction as before maintenance. rotate in direction opposite to that before maintenance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole 50 Hz induction motor is running at 1470 rpm. Find the speed of stator magnetic field with respect to rotor? 1470 rpm 30 rpm 1500 rpm zero 1470 rpm 30 rpm 1500 rpm zero ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If we increase the rotor reactance value, the maximum torque will increase None of these not changed decrease increase None of these not changed decrease ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of 3 - Φ IM, plugging means pulling the motor directly on line without a rotor. locking of rotor due to harmonics. starting the motor on load which is more than the rated load. interchanging two supply phases for quick stopping. pulling the motor directly on line without a rotor. locking of rotor due to harmonics. starting the motor on load which is more than the rated load. interchanging two supply phases for quick stopping. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Unbalance 3 - Φ stator currents cause All of these vibrations. heating of rotor. double frequency currents in the rotor. All of these vibrations. heating of rotor. double frequency currents in the rotor. ANSWER DOWNLOAD EXAMIANS APP
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