Three Phase Induction Motors The approximate efficiency of a 3-phase , 50 Hz, 4 pole induction motor running at 1350 rpm is ______ 65% 90% None of the listed here 40% 65% 90% None of the listed here 40% ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors When the rotor of a 3-phase induction motor is blocked, the slip is _____ 0.1 0.5 0 1 0.1 0.5 0 1 ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In an induction motor the relationship between stator slots and rotor slots is that None of the listed here Stator slots are exact multiple of rotor slots Stator slots are not exact multiple of rotor slots Stator slots are equal to rotor slots None of the listed here Stator slots are exact multiple of rotor slots Stator slots are not exact multiple of rotor slots Stator slots are equal to rotor slots ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors A wound rotor motor is mainly used in applications where ______ High rotor resistance is required during running High starting torque is required Less costly motor is not required Speed control is required High rotor resistance is required during running High starting torque is required Less costly motor is not required Speed control is required ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Slip of an induction motor is negative when Rotor speed is more than the synchronous speed of the field and are in the same direction Magnetic field and rotor rotate in opposite direction Rotor speed is less than the synchronous speed of the field and are in the same direction None of these Rotor speed is more than the synchronous speed of the field and are in the same direction Magnetic field and rotor rotate in opposite direction Rotor speed is less than the synchronous speed of the field and are in the same direction None of these ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The torque developed by a 3 phase induction motor least depends on Rotor current Rotor power factor Shaft diameter Rotor emf Rotor current Rotor power factor Shaft diameter Rotor emf ANSWER DOWNLOAD EXAMIANS APP
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