Three Phase Induction Motors The synchronous speed of a 3-phase induction motor having 20 poles and connected to a 50 Hz source is _____ 600 rpm 300 rpm 1000 rpm 1200 rpm 600 rpm 300 rpm 1000 rpm 1200 rpm ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors For higher efficiency of 3-phase induction motor, the slip should be Large 1 Very large As small as possible Large 1 Very large As small as possible ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The shaft of an induction motor is made of Cast iron Stainless steel Carbon steel High speed steel Cast iron Stainless steel Carbon steel High speed steel ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The efficiency of an induction motor can be expected to be nearly 95 to 98 % 99% 60 to 90% 80 to 90% 95 to 98 % 99% 60 to 90% 80 to 90% ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors 3-phase wound rotor morors are also called _____ motors. Series Slip ring Synchronous Commutator Series Slip ring Synchronous Commutator ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors If the supply voltage of a 3-phase induction motor is increased two times, then torque is _______ Increased two times Increased four times Decreased two times Decreased four times Increased two times Increased four times Decreased two times Decreased four times ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS