Three Phase Induction Motors If the supply voltage of a 3-phase induction motor is increased two times, then torque is _______ Increased four times Increased two times Decreased four times Decreased two times Increased four times Increased two times Decreased four times Decreased two times ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors When a 3-phase induction motor is at no load, the slip is ______ Practically zero 0.2 0.5 1 Practically zero 0.2 0.5 1 ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors 3-phase wound rotor morors are also called _____ motors. Synchronous Slip ring Series Commutator Synchronous Slip ring Series Commutator 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 ______ 65% None of the listed here 90% 40% 65% None of the listed here 90% 40% ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The number of slip rings on a squirrel cage induction motor is usually One None Two Three One None Two Three ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The magnetising current drawn by a 3 phase induction motor is about _______ of full load stator current. 30 to 50% 5% 10 to 15% 15 to 20 % 30 to 50% 5% 10 to 15% 15 to 20 % ANSWER DOWNLOAD EXAMIANS APP
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