Electrical Machines The material used for commutator brushes is mostly cast iron. mica. carbon. copper. cast iron. mica. carbon. copper. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The mechanical power is developed by a DC motor is maximum when 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. back emf is equal to half of applied voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Dissolve gas analysis of transformer oil is carried out to determine condition of bushings. condition of bushing stud. condition of transformer. condition of transformer oil. condition of bushings. condition of bushing stud. condition of transformer. condition of transformer oil. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For very sensitive and wide speed control, the preferable control method is Field control. Armature control. Ward-Leonard control. Multiple voltage control. Field control. Armature control. Ward-Leonard control. Multiple voltage control. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machine armature windings are placed on rotor because of the necessity for development of torque. commutation. generation of voltage. electromechanical energy conversion. development of torque. commutation. generation of voltage. electromechanical energy conversion. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Reactive power generated or delivered significantly depends on both 1 and 2. excitation. frequency. load angle. both 1 and 2. excitation. frequency. load angle. ANSWER DOWNLOAD EXAMIANS APP
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