Three Phase Induction Motors The direction of rotation of field in a 3 phase induction motor depends upon _____ Phase sequence of supply voltage Supply frequency Number of poles Magnitude of supply voltage Phase sequence of supply voltage Supply frequency Number of poles Magnitude of supply voltage ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The starting torque of an induction motor is maximum when rotor resistance per phase is _____ rotor reactance / phase. Four times None of the listed here Two times Equal to Four times None of the listed here Two times Equal to ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors As load on an induction motor goes on increasing Its power factor goes on decreasing Its power factor goes on increasing up to full load and then it falls again Its power factor remains constant Its power factor goes on increasing even after full load Its power factor goes on decreasing Its power factor goes on increasing up to full load and then it falls again Its power factor remains constant Its power factor goes on increasing even after full load 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 Zero frequency High value for the satisfactory speed control The same phase as the rotor e.m.f. The same frequency as the slip frequency Zero frequency High value for the satisfactory speed control The same phase as the rotor e.m.f. ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors 5 H.P., 50Hz, 3-phase, 440 V, induction motors are available for the following r.p.m. Which motor will be the costliest? 730 rpm 1440 rpm 1000 rpm 2880 rpm 730 rpm 1440 rpm 1000 rpm 2880 rpm ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In a squirrel cage induction motor, the number of stator slots is _______ rotor slots. Either more or less than the number of Always greater than the number of Always less than the number of Always eqaul to the number of Either more or less than the number of Always greater than the number of Always less than the number of Always eqaul to the number of ANSWER DOWNLOAD EXAMIANS APP
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