Three Phase Induction Motors The efficiency of an induction motor can be expected to be nearly 60 to 90% 80 to 90% 99% 95 to 98 % 60 to 90% 80 to 90% 99% 95 to 98 % ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Insertion of resistance in the rotor of an induction motor to develop a given torque Rotor current remains same Decreases the rotor current Rotor current becomes zero Increases the rotor current Rotor current remains same Decreases the rotor current Rotor current becomes zero Increases the rotor current ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In a squirrel cage induction motor, the number of stator slots is _______ rotor slots. Always eqaul to the number of Always greater than the number of Either more or less than the number of Always less than the number of Always eqaul to the number of Always greater than the number of Either more or less than the number of Always less than the number of ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The direction of rotation of field in a 3 phase induction motor depends upon _____ Phase sequence of supply voltage Supply frequency Magnitude of supply voltage Number of poles Phase sequence of supply voltage Supply frequency Magnitude of supply voltage Number of poles ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The reactance of the rotor circuit of a 3-phase induction motor is maximum at No load Full load Starting Half full load No load Full load Starting Half full load ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The speed of a squirrel-cage induction motor can be controlled by all of the following except Reducing supply voltage Changing supply frequency Changing number of poles Changing winding resistance Reducing supply voltage Changing supply frequency Changing number of poles Changing winding resistance ANSWER DOWNLOAD EXAMIANS APP
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