Electrical Machines Oil is provided in an oil filled transformer for both cooling and insulation. lubrication. insulating. cooling. both cooling and insulation. lubrication. insulating. cooling. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A commutator in dc machine provide ----------------- rectification? full wave controlled half wave controlled full wave half wave full wave controlled half wave controlled full wave half wave ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The mechanical power is developed by a DC motor is maximum when back emf is equal to half of applied voltage. back emf is equal to twice of applied voltage. none of above. back emf is equal to applied voltage. back emf is equal to half of applied voltage. back emf is equal to twice of applied voltage. none of above. back emf is equal to applied voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When operating, two or more transformers in parallel, % impedance of these transformers should be proportionate to MVA rating of transformers. inversely proportional to MVA rating of transformers. such that actual impedance of all transformers would be same. same. proportionate to MVA rating of transformers. inversely proportional to MVA rating of transformers. such that actual impedance of all transformers would be same. same. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 2 pole synchronous machine is operating at 3000 rpm. Find the relation between electrical angular momentum (ωe) and mechanical angular momentum (ωm) ? ωe = 4*ωm ωe = 2*ωm ωe = 1/2*ωm ωe = ωm ωe = 4*ωm ωe = 2*ωm ωe = 1/2*ωm ωe = ωm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Capacitor in split phase induction motor is used to improve the power factor. reduce the harmonics. start the motor. improve the starting torque. improve the power factor. reduce the harmonics. start the motor. improve the starting torque. ANSWER DOWNLOAD EXAMIANS APP
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