Three Phase Induction Motors The maximum torque of a 3-phase induction motor under running conditions is None of the listed here Inveresly proportional to supply voltage Directly proportional to rotor resistance inversely proportional to rotor reactance at standstill None of the listed here Inveresly proportional to supply voltage Directly proportional to rotor resistance inversely proportional to rotor reactance at standstill ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The cogging of an induction motor can be avoided by Using DOL starter Auto transformer starter Proper ventilation Having number of rotor slots more or less than the number of stator slots Using DOL starter Auto transformer starter Proper ventilation Having number of rotor slots more or less than the number of stator slots ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Very large 3-phase induction motors (greater than 25 HP) are started _____ None of the listed here By auto transformer starting Direct on line Star-delta starting None of the listed here By auto transformer starting Direct on line Star-delta starting ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The shape of the torque/slip curve of induction motor is Rectangular parabola Parabola Straight line Hyperbola Rectangular parabola Parabola Straight line Hyperbola ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The approximate efficiency of a 3-phase , 50 Hz, 4 pole induction motor running at 1350 rpm is ______ 40% 90% 65% None of the listed here 40% 90% 65% None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The crawling in an induction motor is caused by Low voltage supply High loads Improper design of machine Harmonics developed in the rotor Low voltage supply High loads Improper design of machine Harmonics developed in the rotor ANSWER DOWNLOAD EXAMIANS APP
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