Electrical Machines In synchronous generator a synchronous dead load (lamp, furnaces etc) has no ____________ hence it has no natural frequency of oscillation. damping torque. restoring torque. synchronizing power co efficient. mechanical rotatory system. damping torque. restoring torque. synchronizing power co efficient. mechanical rotatory system. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ward Leonard control provides speed control below rated speed. in both direction. above rated speed. in one direction only. below rated speed. in both direction. above rated speed. in one direction only. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Use of fractional pitch winding results in reduced leakage reactance. make it stiffer. results in reduced axial length of the machine. All of these results in reduced leakage reactance. make it stiffer. results in reduced axial length of the machine. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Stray losses in transformer occurs in transformer insulating oil. paper insulation in transformers. steel core. winding conductors and steel structures of transformer. transformer insulating oil. paper insulation in transformers. steel core. winding conductors and steel structures of transformer. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the armature electric current is increased to double its previous value, and the time of commutation is halved, how will the reactance voltage vary? It will remain the same. It will becomes four times. It will be halved. It will be doubled. It will remain the same. It will becomes four times. It will be halved. It will be doubled. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines No load test of 3-phase induction motor gives which of the following? variable loss None of these both A and B constant loss variable loss None of these both A and B constant loss ANSWER DOWNLOAD EXAMIANS APP
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