Three Phase Induction Motors The term cogging is associated with Three phase transformer Induction motors Compound generators Dc series motors Three phase transformer Induction motors Compound generators Dc series motors ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The shape of the torque/slip curve of induction motor is Hyperbola Straight line Rectangular parabola Parabola Hyperbola Straight line Rectangular parabola Parabola ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The injected e.m.f. in the rotor of induction motor must have Zero frequency The same frequency as the slip frequency High value for the satisfactory speed control The same phase as the rotor e.m.f. Zero frequency The same frequency as the slip 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 Very large 3-phase induction motors (greater than 25 HP) are started _____ None of the listed here By auto transformer starting Direct on line Star-delta starting None of the listed here By auto transformer starting Direct on line Star-delta starting ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The crawling in an induction motor is caused by Low voltage supply Improper design of machine Harmonics developed in the rotor High loads Low voltage supply Improper design of machine Harmonics developed in the rotor High loads ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors One of the speeds of a 2 speed squirrel cage induction motor is 800 rpm. The other speed will be _____ 400 rpm 1600 rpm 2400 rpm 1200 rpm 400 rpm 1600 rpm 2400 rpm 1200 rpm ANSWER DOWNLOAD EXAMIANS APP
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