Three Phase Induction Motors A wound rotor motor is mainly used in applications where ______ High starting torque is required High rotor resistance is required during running Less costly motor is not required Speed control is required High starting torque is required High rotor resistance is required during running Less costly motor is not required Speed control is required ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The 3- phase induction motor is so designed that the rotor should have ______ under running conditions. High reactance high resistance Large slip Low resistance High reactance high resistance Large slip Low resistance ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors If a 4 pole induction motor has a synchronous speed of 1500 rpm, then supply frequency is _____ 50 Hz None of the listed here 25 Hz 60 Hz 50 Hz None of the listed here 25 Hz 60 Hz ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The cogging of an induction motor can be avoided by Auto transformer starter Proper ventilation Using DOL starter Having number of rotor slots more or less than the number of stator slots Auto transformer starter Proper ventilation Using DOL starter Having number of rotor slots more or less than the number of stator slots ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The condition of induction motor at stand still resemble those of a transformer whose secondady is _______ Short circuited 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 ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Very large 3-phase induction motors (greater than 25 HP) are started _____ Direct on line Star-delta starting None of the listed here By auto transformer starting Direct on line Star-delta starting None of the listed here By auto transformer starting ANSWER DOWNLOAD EXAMIANS APP
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