Three Phase Induction Motors The direction of rotation of field in a 3 phase induction motor depends upon _____ Number of poles Magnitude of supply voltage Phase sequence of supply voltage Supply frequency Number of poles Magnitude of supply voltage Phase sequence of supply voltage Supply frequency ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The injected e.m.f. in the rotor of induction motor must have High value for the satisfactory speed control Zero frequency The same phase as the rotor e.m.f. The same frequency as the slip frequency High value for the satisfactory speed control Zero frequency The same phase as the rotor e.m.f. The same frequency as the slip frequency ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The frame of an induction motor is usually made of Silicon steel Cast iron Bronze Aluminium Silicon steel Cast iron Bronze Aluminium ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The cogging of an induction motor can be avoided by Proper ventilation Having number of rotor slots more or less than the number of stator slots Auto transformer starter Using DOL starter Proper ventilation Having number of rotor slots more or less than the number of stator slots Auto transformer starter Using DOL starter ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The condition of induction motor at stand still resemble those of a transformer whose secondady is _______ Supplying a variable resistive load None of the listed here Open circuited Short circuited Supplying a variable resistive load None of the listed here Open circuited Short circuited ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors A 3 phase induction motor is running at 2% slip. If the input to rotor is 1000 W, then mechanical power developed by the motor is _______ 980 W 200 W 20 W 500 W 980 W 200 W 20 W 500 W ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS