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 winding resistance Changing number of poles Reducing supply voltage Changing supply frequency Changing winding resistance Changing number of poles ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In a squirrel cage induction motor, the number of rotor bars is generally ________ Equal to stator poles Even number Prime number None of the listed here Equal to stator poles Even number Prime number None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors If the rotor slots are made deeper, rotor resistance is ______ Decreased at starting Increased at starting Increased under running conditions None of the listed here Decreased at starting Increased at starting Increased under running conditions None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The maximum torque of a 3-phase induction motor under running conditions is inversely proportional to rotor reactance at standstill None of the listed here Directly proportional to rotor resistance Inveresly proportional to supply voltage inversely proportional to rotor reactance at standstill None of the listed here Directly proportional to rotor resistance Inveresly proportional to supply voltage 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% 65% None of the listed here 90% 40% 65% None of the listed here 90% ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Less maintenance troubles are experienced in case of Both (A) and (B) Squirrel cage induction motor None of these Slip ring induction motor Both (A) and (B) Squirrel cage induction motor None of these Slip ring induction motor ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS