Electrical Machines Which of the following is not a necessary condition to be satisfied for synchronising an incoming alternator to an already operating alternator? same prime mover speed same phase sequence same frequency same voltage magnitude same prime mover speed same phase sequence same frequency same voltage magnitude ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous motor electromagnetic power varies None of these inversely as applied voltage directly as applied voltage directly as square of applied voltage None of these inversely as applied voltage directly as applied voltage directly as square of applied voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Fifth harmonic component of the induced voltage in three phase AC generator can be eliminated by using a winding pitch of 4 / 5. 6 / 7. 2 / 3. 5 / 6. 4 / 5. 6 / 7. 2 / 3. 5 / 6. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a given torque, reducing divertor resistance of a DC series motor Increase in speed demanding more armature current. Increase in speed but armature currnet remains the same. Decrease in speed but armature current remains the same. Decrease in speed demanding less armature current. Increase in speed demanding more armature current. Increase in speed but armature currnet remains the same. Decrease in speed but armature current remains the same. Decrease in speed demanding less armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What does happen if tripled harmonics given to induction motor? Will results in short circuit. Fail to start. Will results in open circuit. Nothing will happen. Will results in short circuit. Fail to start. Will results in open circuit. Nothing will happen. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC motors are stopped by opening line switches and not by forcing the handle of the motor starter back to OFF position. This is due to occurance of Both of above. None of these. Heavy sparking at the first stud of starting resistance steps. Heavy sparking at brushes. Both of above. None of these. Heavy sparking at the first stud of starting resistance steps. Heavy sparking at brushes. ANSWER DOWNLOAD EXAMIANS APP
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