Three Phase Induction Motors The frequency of rotor current in a 6-pole , 50 Hz, 3-phase induction motor running at 950 rpm is 0.05 Hz 1.5 Hz 2.5 Hz 5 Hz 0.05 Hz 1.5 Hz 2.5 Hz 5 Hz ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In an induction motor, no load the slip is generally 2% 1.5 % Less than 1% 4% 2% 1.5 % Less than 1% 4% ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In an induction motor if air gap increased Windage losses will be more The power factor will be low Bearing friction will reduce Copper loss will reduce Windage losses will be more The power factor will be low Bearing friction will reduce Copper loss will reduce ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors A wound rotor motor is mainly used in applications where ______ Less costly motor is not required High rotor resistance is required during running Speed control is required High starting torque is required Less costly motor is not required High rotor resistance is required during running Speed control is required High starting torque is required ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The advantage of wound rotor motor is that _______ It requires less maintenance None of the listed here It is inexpensive External resistance can be inserted in the rotor circuit It requires less maintenance None of the listed here It is inexpensive External resistance can be inserted in the rotor circuit 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 Open circuited None of the listed here Short circuited Supplying a variable resistive load Open circuited None of the listed here Short circuited ANSWER DOWNLOAD EXAMIANS APP
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