Electrical Machines The shaft of induction motor may be unbalanced due to poor lubrication. overheating of winding. uneven air gap. overload. poor lubrication. overheating of winding. uneven air gap. overload. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The synchronous speed of an induction motor will be increased by increasing of frequency. increasing number of poles. speed can not be increased. decreasing of frequency. increasing of frequency. increasing number of poles. speed can not be increased. decreasing of frequency. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is power factor of a 3 - φ induction motor at no load? Same as full load. High. Low. Equal to 1. Same as full load. High. Low. Equal to 1. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature voltage control is considered suitable for a DC motor driven at constant power. torque. speed. current. power. torque. speed. current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When operating, two or more transformers in parallel, % impedance of these transformers should be same. such that actual impedance of all transformers would be same. inversely proportional to MVA rating of transformers. proportionate to MVA rating of transformers. same. such that actual impedance of all transformers would be same. inversely proportional to MVA rating of transformers. proportionate to MVA rating of transformers. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Conservator tank is used None of these to act as an oil storage. to take up the expansion of oil due to temperature rise. for better cooling of transformer. None of these to act as an oil storage. to take up the expansion of oil due to temperature rise. for better cooling of transformer. ANSWER DOWNLOAD EXAMIANS APP
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