Three Phase Induction Motors The synchronous speed of a 3-phase induction motor having 20 poles and connected to a 50 Hz source is _____ 1000 rpm 300 rpm 600 rpm 1200 rpm 1000 rpm 300 rpm 600 rpm 1200 rpm ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors If any two phases for an induction motor are interchanged The motor will not run The motor will burn The motor will run at reduced speed The motor will run in reverse direction The motor will not run The motor will burn The motor will run at reduced speed The motor will run in reverse direction ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The condition of induction motor at no load resemble those of a transformer whose secondady is _______ Open circuited Short-circuited None of the listed here Supplying a variable resistive load Open circuited Short-circuited None of the listed here Supplying a variable resistive load ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The advantage of wound rotor motor is that _______ None of the listed here External resistance can be inserted in the rotor circuit It is inexpensive It requires less maintenance None of the listed here External resistance can be inserted in the rotor circuit It is inexpensive It requires less maintenance ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The injected e.m.f. in the rotor of induction motor must have The same frequency as the slip frequency High value for the satisfactory speed control Zero frequency The same phase as the rotor e.m.f. The same frequency as the slip frequency High value for the satisfactory speed control Zero frequency The same phase as the rotor e.m.f. ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The reactance of the rotor circuit of a 3-phase induction motor is maximum at Half full load Starting Full load No load Half full load Starting Full load No load ANSWER DOWNLOAD EXAMIANS APP
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