Electrical Machines To avoid formation of grooves in the commutator the brushes of opposite polarity should track each other. the brushes of same polarity should track each other. brush position has no effect on the commutator grooving. None of these the brushes of opposite polarity should track each other. the brushes of same polarity should track each other. brush position has no effect on the commutator grooving. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The working principle of transformer depends on Faradays law of electromagnetic induction. Newtons law. Amperes law. Coulombs law. Faradays law of electromagnetic induction. Newtons law. Amperes law. Coulombs law. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator, the ripples in the direct emf generated are reduced by employing equalizer rings. commutator with large number of segments. carbon brushes. graphite brushes. equalizer rings. commutator with large number of segments. carbon brushes. graphite brushes. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a transformer to be tested at full load conditions but consuming only losses from the main, we do OC and SC tests None of these back to back test load test OC and SC tests None of these back to back test load test ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Scott connections are used for three phase to two phase transformation. single phase to three phase transformation. three phase to single phase transformation. any of the above. three phase to two phase transformation. single phase to three phase transformation. three phase to single phase transformation. any of the above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following methods of speed control is not affected through stator side? Change of rotor resistance. Change of supply voltage. Change of supply frequency. Change of number of pole. Change of rotor resistance. Change of supply voltage. Change of supply frequency. Change of number of pole. ANSWER DOWNLOAD EXAMIANS APP
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